diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 0f7e9d5b..7429c1fb 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -18,6 +18,7 @@ with the contributing guidelines (found in the CONTRIBUTING.md file).
 
 - [ ] Unit tests
 - [ ] Documentation is up to date
+- [ ] Regenerate README if a new matcher has been added to `/docs/README.template.md` (`yarn generate-readme`)
 - [ ] No additional lint warnings
 - [ ] Add yourself to contributors list (`yarn contributor`)
 - [ ] [Typescript definitions](https://github.com/jest-community/jest-extended/blob/master/types/index.d.ts) are added/updated where relevant
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index feccb964..1a629ed3 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -34,7 +34,12 @@ Head over to [here](https://hacktoberfest.digitalocean.com/sign_up/register) to
    * See the Jest docs for an [example usage](https://facebook.github.io/jest/docs/en/expect.html#thisutils)
  - Jest's [`expect`](https://github.com/facebook/jest/tree/master/packages/expect) package is being used to access their deep `equals` function.
    * `import { equals } from 'expect/build/jasmine_utils';`
- - Docs for the new matcher should be updated in the API section of the `README.md` to no longer say `Unimplemented`.
+ - Docs for new matchers should be added to `/docs/sandbox/matchers/[matcher.test.js]`, with a comment explaining the matcher and a code example of how to use the matcher.
+ - To add the matcher to the README you will need to link the docs in `docs/README.template.md` with the following syntax:
+ ```
+ {{/sandbox/matchers/myNewMatcherName.test.js}}
+ ```
+ - Once you have linked it in the template you can regenerate the README by running `yarn generate-readme`.
  - Type definitions for the new matchers should be added to `types/index.d.ts`.
 
 ## Committing and Pushing changes
diff --git a/README.md b/README.md
index 1fca507c..dd8822c9 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ If you've come here to help contribute - Thanks! Take a look at the [contributin
 - [Contributing](#contributing)
 - [Installation](#installation)
 - [Setup](#setup)
+- [jest-extended REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2FtoBeEmpty.test.js)
 - [API](#api)
     - [.pass(message)](#passmessage)
     - [.fail(message)](#failmessage)
@@ -188,6 +189,8 @@ test('passes when given an empty object', () => {
 });
 ```
 
+[Open toBeEmpty in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2FtoBeEmpty.test.js)
+
 #### .toBeOneOf([members])
 
 Use `.toBeOneOf` when checking if a value is a member of a given `Array`.
@@ -199,6 +202,8 @@ test('passes when value is in given array', () => {
 });
 ```
 
+[Open toBeOneOf in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2FtoBeOneOf.test.js)
+
 #### .toBeNil()
 
 Use `.toBeNil` when checking a value is `null` or `undefined`.
@@ -211,6 +216,8 @@ test('passes when value is null or undefined', () => {
 });
 ```
 
+[Open toBeNil in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2FtoBeNil.test.js)
+
 #### .toSatisfy(predicate)
 
 Use `.toSatisfy` when you want to use a custom matcher by supplying a predicate function that returns a `Boolean`.
@@ -224,6 +231,8 @@ test('passes when value passes given predicate', () => {
 });
 ```
 
+[Open toSatisfy in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2FtoSatisfy.test.js)
+
 ### Array
 
 #### .toBeArray()
@@ -238,6 +247,8 @@ test('passes when value is an array', () => {
 });
 ```
 
+[Open toBeArray in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Farray%2FtoBeArray.test.js)
+
 #### .toBeArrayOfSize()
 
 Use `.toBeArrayOfSize` when checking if a value is an `Array` of size x.
@@ -250,6 +261,8 @@ test('passes when value is an array', () => {
 });
 ```
 
+[Open toBeArrayOfSize in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Farray%2FtoBeArrayOfSize.test.js)
+
 #### .toIncludeAllMembers([members])
 
 Use `.toIncludeAllMembers` when checking if an `Array` contains all of the same members of a given set.
@@ -261,6 +274,8 @@ test('passes when given array values match the members of the set', () => {
 });
 ```
 
+[Open toIncludeAllMembers in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Farray%2FtoIncludeAllMembers.test.js)
+
 #### .toIncludeAnyMembers([members])
 
 Use `.toIncludeAnyMembers` when checking if an `Array` contains any of the members of a given set.
@@ -273,6 +288,8 @@ test('passes when given array values match any of the members in the set', () =>
 });
 ```
 
+[Open toIncludeAnyMembers in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Farray%2FtoIncludeAnyMembers.test.js)
+
 #### .toIncludeSameMembers([members])
 
 Use `.toIncludeSameMembers` when checking if two arrays contain equal values, in any order.
@@ -284,6 +301,7 @@ test('passes when arrays match in a different order', () => {
 });
 ```
 
+[Open toIncludeSameMembers in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Farray%2FtoIncludeSameMembers.test.js)
 
 #### .toSatisfyAll(predicate)
 
@@ -292,11 +310,13 @@ Use `.toSatisfyAll` when you want to use a custom matcher by supplying a predica
 ```js
 test('passes when all values in array pass given predicate', () => {
   const isOdd = el => el % 2 === 1;
-  expect([1,3,5,7]).toSatisfyAll(isOdd);
-  expect([1,3,4,5,7]).not.toSatisfyAll(isOdd);
+  expect([1, 3, 5, 7]).toSatisfyAll(isOdd);
+  expect([1, 3, 4, 5, 7]).not.toSatisfyAll(isOdd);
 });
 ```
 
+[Open toSatisfyAll in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Farray%2FtoSatisfyAll.test.js)
+
 ### Boolean
 
 #### .toBeBoolean()
@@ -312,33 +332,40 @@ test('passes when value is a boolean', () => {
 });
 ```
 
+[Open toBeBoolean in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fboolean%2FtoBeBoolean.test.js)
+
 #### .toBeTrue()
 
 Use `.toBeTrue` when checking a value is equal (===) to `true`.
 
 ```js
 test('is jest cool', () => {
+  const isJestCool = () => true;
   expect(isJestCool()).toBeTrue();
   expect(false).not.toBeTrue();
 });
 ```
 
+[Open toBeTrue in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fboolean%2FtoBeTrue.test.js)
+
 #### .toBeFalse()
 
 Use `.toBeFalse` when checking a value is equal (===) to `false`.
 
 ```js
 test('returns false', () => {
-  expect(areWeThereYet()).toBeFalse();
+  expect(false).toBeFalse();
   expect(true).not.toBeFalse();
 });
 ```
 
+[Open toBeFalse in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fboolean%2FtoBeFalse.test.js)
+
 ### ~~Date~~
 
 Proposal in #117 (*under development*)
 
-### .toBeDate()
+#### .toBeDate()
 
 Use `.toBeDate` when checking if a value is a `Date`.
 
@@ -346,42 +373,55 @@ Use `.toBeDate` when checking if a value is a `Date`.
 test('passes when value is a date', () => {
   expect(new Date()).toBeDate();
   expect('01/01/2018').not.toBeDate();
-  expect(new Date('01/01/2018').toBeDate();
+  expect(new Date('01/01/2018')).toBeDate();
   expect(undefined).not.toBeDate();
 });
 ```
 
-### .toBeValidDate()
+[Open toBeDate in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fdate%2FtoBeDate.test.js)
+
+#### .toBeValidDate()
 
 Use `.toBeValidDate` when checking if a given `Date` object is valid.
 
-```
+```js
 test('passes when Date is valid', () => {
   expect(new Date()).toBeValidDate();
   expect('01/01/2018').not.toBeValidDate();
-  expect(new Date('01/01/2018').toBeValidDate();
-  expect(new Date('01/90/2018').not.toBeValidDate();
+  expect(new Date('01/01/2018')).toBeValidDate();
+  expect(new Date('01/90/2018')).not.toBeValidDate();
   expect(undefined).not.toBeValidDate();
 });
 ```
 
-### .toBeAfter(date)
- Use `.toBeAfter` when checking if a date occurs after `date`.
- ```js
+[Open toBeValidDate in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fdate%2FtoBeValidDate.test.js)
+
+#### .toBeAfter(date)
+
+Use `.toBeAfter` when checking if a date occurs after `date`.
+
+```js
 test('passes when input is after date', () => {
   expect(new Date('01/01/2019')).toBeAfter(new Date('01/01/2018'));
   expect('01/01/2018').not.toBeAfter(new Date('01/01/2019'));
 });
 ```
- ### .toBeBefore(date)
- Use `.toBeBefore` when checking if a date occurs before `date`.
- ```js
+
+[Open toBeAfter in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fdate%2FtoBeAfter.test.js)
+
+#### .toBeBefore(date)
+
+Use `.toBeBefore` when checking if a date occurs before `date`.
+
+```js
 test('passes when input is before date', () => {
   expect(new Date('01/01/2018')).toBeBefore(new Date('01/01/2019'));
   expect('01/01/2019').not.toBeBefore(new Date('01/01/2018'));
 });
 ```
 
+[Open toBeBefore in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fdate%2FtoBeBefore.test.js)
+
 ### Function
 
 #### .toBeFunction()
@@ -390,14 +430,15 @@ Use `.toBeFunction` when checking if a value is a `Function`.
 
 ```js
 test('passes when value is a function', () => {
-  function noop = () {};
+  function noop() {}
   expect(() => {}).toBeFunction();
-  expect(function() {}).not.toBeFunction();
   expect(noop).toBeFunction();
   expect(true).not.toBeFunction();
 });
 ```
 
+[Open toBeFunction in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Ffunction%2FtoBeFunction.test.js)
+
 ### Mock
 
 #### .toHaveBeenCalledBefore()
@@ -406,9 +447,7 @@ Use `.toHaveBeenCalledBefore` when checking if a `Mock` was called before anothe
 
 _Note: Required Jest version >=23_
 
-
 ```js
-
 it('calls mock1 before mock2', () => {
   const mock1 = jest.fn();
   const mock2 = jest.fn();
@@ -427,9 +466,7 @@ Use `.toHaveBeenCalledAfter` when checking if a `Mock` was called after another
 
 _Note: Required Jest version >=23_
 
-
 ```js
-
 it('calls mock1 after mock2', () => {
   const mock1 = jest.fn();
   const mock2 = jest.fn();
@@ -457,6 +494,8 @@ test('passes when value is a number', () => {
 });
 ```
 
+[Open toBeNumber in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeNumber.test.js)
+
 #### .toBeNaN()
 
 Use `.toBeNaN` when checking a value is `NaN`.
@@ -468,6 +507,8 @@ test('passes when value is NaN', () => {
 });
 ```
 
+[Open toBeNaN in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeNaN.test.js)
+
 #### .toBeFinite()
 
 Use `.toBeFinite` when checking if a value is a `Number`, not `NaN` or `Infinity`.
@@ -480,6 +521,8 @@ test('passes when value is a finite number', () => {
 });
 ```
 
+[Open toBeFinite in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeFinite.test.js)
+
 #### .toBePositive()
 
 Use `.toBePositive` when checking if a value is a positive `Number`.
@@ -493,6 +536,8 @@ test('passes when value is a positive number', () => {
 });
 ```
 
+[Open toBePositive in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBePositive.test.js)
+
 #### .toBeNegative()
 
 Use `.toBeNegative` when checking if a value is a negative `Number`.
@@ -506,8 +551,9 @@ test('passes when value is a negative number', () => {
 });
 ```
 
-#### .toBeEven()
+[Open toBeNegative in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeNegative.test.js)
 
+#### .toBeEven()
 
 Use `.toBeEven` when checking if a value is an even `Number`.
 
@@ -519,6 +565,8 @@ test('passes when value is an even number', () => {
 });
 ```
 
+[Open toBeEven in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeEven.test.js)
+
 #### .toBeOdd()
 
 Use `.toBeOdd` when checking if a value is an odd `Number`.
@@ -531,6 +579,8 @@ test('passes when value is an odd number', () => {
 });
 ```
 
+[Open toBeOdd in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeOdd.test.js)
+
 #### .toBeWithin(start, end)
 
 Use `.toBeWithin` when checking if a number is in between the given bounds of: start (inclusive) and end (exclusive).
@@ -543,6 +593,8 @@ test('passes when number is within given bounds', () => {
 });
 ```
 
+[Open toBeWithin in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fnumber%2FtoBeWithin.test.js)
+
 ### Object
 
 #### .toBeObject()
@@ -557,6 +609,8 @@ test('passes when value is an object', () => {
 });
 ```
 
+[Open toBeObject in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoBeObject.test.js)
+
 #### .toContainKey(key)
 
 Use `.toContainKey` when checking if an object contains the provided key.
@@ -571,6 +625,8 @@ test('passes when object contains the given key', () => {
 });
 ```
 
+[Open toContainKey in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainKey.test.js)
+
 #### .toContainKeys([keys])
 
 Use `.toContainKeys` when checking if an object has all of the provided keys.
@@ -584,6 +640,8 @@ test('passes when object contains all keys', () => {
 });
 ```
 
+[Open toContainKeys in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainKeys.test.js)
+
 #### .toContainAllKeys([keys])
 
 Use `.toContainAllKeys` when checking if an object only contains all of the provided keys.
@@ -597,6 +655,8 @@ test('passes when object only contains all keys', () => {
 });
 ```
 
+[Open toContainAllKeys in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainAllKeys.test.js)
+
 #### .toContainAnyKeys([keys])
 
 Use `.toContainAnyKeys` when checking if an object contains at least one of the provided keys.
@@ -611,6 +671,8 @@ test('passes when object contains at least one matching key', () => {
 });
 ```
 
+[Open toContainAnyKeys in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainAnyKeys.test.js)
+
 #### .toContainValue(value)
 
 Use `.toContainValue` when checking if an object contains the provided value.
@@ -624,6 +686,8 @@ test('passes when object contains given value', () => {
 });
 ```
 
+[Open toContainValue in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainValue.test.js)
+
 #### .toContainValues([values])
 
 Use `.toContainValues` when checking if an object contains all of the provided values.
@@ -637,6 +701,8 @@ test('passes when object contains all of the given values', () => {
 });
 ```
 
+[Open toContainValues in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainValues.test.js)
+
 #### .toContainAllValues([values])
 
 Use `.toContainAllValues` when checking if an object only contains all of the provided values.
@@ -650,6 +716,8 @@ test('passes when object only contains all of the given values', () => {
 });
 ```
 
+[Open toContainAllValues in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainAllValues.test.js)
+
 #### .toContainAnyValues([values])
 
 Use `.toContainAnyValues` when checking if an object contains at least one of the provided values.
@@ -664,6 +732,8 @@ test('passes when object contains at least one of the given values', () => {
 });
 ```
 
+[Open toContainAnyValues in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainAnyValues.test.js)
+
 #### .toContainEntry([key, value])
 
 Use `.toContainEntry` when checking if an object contains the provided entry.
@@ -678,6 +748,8 @@ test('passes when object contains given entry', () => {
 });
 ```
 
+[Open toContainEntry in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainEntry.test.js)
+
 #### .toContainEntries([[key, value]])
 
 Use `.toContainEntries` when checking if an object contains all of the provided entries.
@@ -691,6 +763,8 @@ test('passes when object contains all of the given entries', () => {
 });
 ```
 
+[Open toContainEntries in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainEntries.test.js)
+
 #### .toContainAllEntries([[key, value]])
 
 Use `.toContainAllEntries` when checking if an object only contains all of the provided entries.
@@ -703,6 +777,8 @@ test('passes when object only contains all of the given entries', () => {
 });
 ```
 
+[Open toContainAllEntries in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainAllEntries.test.js)
+
 #### .toContainAnyEntries([[key, value]])
 
 Use `.toContainAnyEntries` when checking if an object contains at least one of the provided entries.
@@ -717,17 +793,21 @@ test('passes when object contains at least one of the given entries', () => {
 });
 ```
 
+[Open toContainAnyEntries in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoContainAnyEntries.test.js)
+
 #### .toBeExtensible()
 
 Use `.toBeExtensible` when checking if an object is extensible.
 
 ```js
 test('passes when value is extensible', () => {
-  expect({a: 1}).toBeExtensible();
+  expect({ a: 1 }).toBeExtensible();
   expect(1).not.toBeExtensible();
 });
 ```
 
+[Open toBeExtensible in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fobject%2FtoBeExtensible.test.js)
+
 #### .toBeFrozen()
 
 Use `.toBeFrozen` when checking if an object is frozen.
@@ -771,6 +851,8 @@ test('passes when value is a string', () => {
 });
 ```
 
+[Open toBeString in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoBeString.test.js)
+
 #### .toBeHexadecimal(string)
 
 Use `.toBeHexadecimal` when checking if a value is a valid HTML hexadecimal color.
@@ -784,6 +866,8 @@ test('passes when value is a valid hexadecimal', () => {
 });
 ```
 
+[Open toBeHexadecimal in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoBeHexadecimal.test.js)
+
 #### .toEqualCaseInsensitive(string)
 
 Use `.toEqualCaseInsensitive` when checking if a string is equal (===) to another ignoring the casing of both strings.
@@ -798,6 +882,8 @@ test('passes when strings are equal ignoring case', () => {
 });
 ```
 
+[Open toEqualCaseInsensitive in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoEqualCaseInsensitive.test.js)
+
 #### .toStartWith(prefix)
 
 Use `.toStartWith` when checking if a `String` starts with a given `String` prefix.
@@ -809,6 +895,8 @@ test('passes when value is starts with given string', () => {
 });
 ```
 
+[Open toStartWith in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoStartWith.test.js)
+
 #### .toEndWith(suffix)
 
 Use `.toEndWith` when checking if a `String` ends with a given `String` suffix.
@@ -820,6 +908,8 @@ test('passes when value is ends with given string', () => {
 });
 ```
 
+[Open toEndWith in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoEndWith.test.js)
+
 #### .toInclude(substring)
 
 Use `.toInclude` when checking if a `String` includes the given `String` substring.
@@ -831,6 +921,8 @@ test('passes when value includes substring', () => {
 });
 ```
 
+[Open toInclude in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoInclude.test.js)
+
 #### .toIncludeRepeated(substring, times)
 
 Use `.toIncludeRepeated` when checking if a `String` includes the given `String` substring the correct number of times.
@@ -842,6 +934,8 @@ test('passes when value includes substring n times', () => {
 });
 ```
 
+[Open toIncludeRepeated in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoIncludeRepeated.test.js)
+
 #### .toIncludeMultiple([substring])
 
 Use `.toIncludeMultiple` when checking if a `String` includes all of the given substrings.
@@ -853,6 +947,8 @@ test('passes when value includes all substrings', () => {
 });
 ```
 
+[Open toIncludeMultiple in REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2Fstring%2FtoIncludeMultiple.test.js)
+
 ## Contributors
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
diff --git a/docs/EXAMPLES.md b/docs/EXAMPLES.md
deleted file mode 100644
index e8f6743f..00000000
--- a/docs/EXAMPLES.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Examples
-
-☹️ None created yet, fancy adding some? See [CONTRIBUTING](/CONTRIBUTING.md)
diff --git a/docs/README.template.md b/docs/README.template.md
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+<div align="center">
+  <h1>jest-extended</h1>
+
+  🃏💪
+
+  Additional Jest matchers
+</div>
+
+<hr />
+
+[![Build Status](https://img.shields.io/travis/jest-community/jest-extended.svg?style=flat-square)](https://travis-ci.org/jest-community/jest-extended)
+[![Code Coverage](https://img.shields.io/codecov/c/github/jest-community/jest-extended.svg?style=flat-square)](https://codecov.io/github/jest-community/jest-extended)
+[![version](https://img.shields.io/npm/v/jest-extended.svg?style=flat-square)](https://www.npmjs.com/package/jest-extended)
+[![downloads](https://img.shields.io/npm/dm/jest-extended.svg?style=flat-square)](http://npm-stat.com/charts.html?package=jest-extended&from=2017-09-14)
+[![MIT License](https://img.shields.io/npm/l/jest-extended.svg?style=flat-square)](https://github.com/jest-community/jest-extended/blob/master/LICENSE)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com)
+[![Roadmap](https://img.shields.io/badge/%F0%9F%93%94-roadmap-CD9523.svg?style=flat-square)](https://github.com/jest-community/jest-extended/blob/master/docs/ROADMAP.md)
+[![Examples](https://img.shields.io/badge/%F0%9F%92%A1-examples-ff615b.svg?style=flat-square)](https://github.com/jest-community/jest-extended/blob/master/docs/EXAMPLES.md)
+
+## Problem
+
+Jest is an amazing test runner and has some awesome assertion APIs built in by default. However there are times when
+having more specific matchers (assertions) would be far more convenient.
+
+## Solution
+
+jest-extended aims to add additional matchers to Jest's default ones making it easy to test everything 🙌
+
+## Contributing
+
+If you've come here to help contribute - Thanks! Take a look at the [contributing](/CONTRIBUTING.md) docs as a way of getting started.
+
+---
+
+- [Problem](#problem)
+- [Solution](#solution)
+- [Contributing](#contributing)
+- [Installation](#installation)
+- [Setup](#setup)
+- [jest-extended REPL](https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox?module=%2Fmatchers%2FtoBeEmpty.test.js)
+- [API](#api)
+    - [.pass(message)](#passmessage)
+    - [.fail(message)](#failmessage)
+    - [.toBeEmpty()](#tobeempty)
+    - [.toBeOneOf([members])](#tobeoneofmembers)
+    - [.toBeNil()](#tobenil)
+    - [.toSatisfy(predicate)](#tosatisfypredicate)
+  - [Array](#array)
+    - [.toBeArray()](#tobearray)
+    - [.toBeArrayOfSize()](#tobearrayofsize)
+    - [.toIncludeAllMembers([members])](#toincludeallmembersmembers)
+    - [.toIncludeAnyMembers([members])](#toincludeanymembersmembers)
+    - [.toIncludeSameMembers([members])](#toincludesamemembersmembers)
+    - [.toSatisfyAll(predicate)](#tosatisfyallpredicate)
+  - [Boolean](#boolean)
+    - [.toBeBoolean()](#tobeboolean)
+    - [.toBeTrue()](#tobetrue)
+    - [.toBeFalse()](#tobefalse)
+  - [Date](#date)
+    - [.toBeDate()](#tobedate)
+    - [.toBeValidDate()](#tobevaliddate)
+    - [.toBeAfter(date)](#tobeafterdate)
+    - [.toBeBefore(date)](#tobebeforedate)
+    - Further proposals in [#117](https://github.com/jest-community/jest-extended/issues/117) PRs welcome
+  - [Function](#function)
+    - [.toBeFunction()](#tobefunction)
+  - [Mock](#mock)
+    - [.toHaveBeenCalledBefore()](#tohavebeencalledbefore)
+    - [.toHaveBeenCalledAfter()](#tohavebeencalledafter)
+  - [Number](#number)
+    - [.toBeNumber()](#tobenumber)
+    - [.toBeNaN()](#tobenan)
+    - [.toBeFinite()](#tobefinite)
+    - [.toBePositive()](#tobepositive)
+    - [.toBeNegative()](#tobenegative)
+    - [.toBeEven()](#tobeeven)
+    - [.toBeOdd()](#tobeodd)
+    - [.toBeWithin(start, end)](#tobewithinstart--end)
+  - [Object](#object)
+    - [.toBeObject()](#tobeobject)
+    - [.toContainKey(key)](#tocontainkeykey)
+    - [.toContainKeys([keys])](#tocontainkeyskeys)
+    - [.toContainAllKeys([keys])](#tocontainallkeyskeys)
+    - [.toContainAnyKeys([keys])](#tocontainanykeyskeys)
+    - [.toContainValue(value)](#tocontainvaluevalue)
+    - [.toContainValues([values])](#tocontainvaluesvalues)
+    - [.toContainAllValues([values])](#tocontainallvaluesvalues)
+    - [.toContainAnyValues([values])](#tocontainanyvaluesvalues)
+    - [.toContainEntry([key, value])](#tocontainentrykey--value)
+    - [.toContainEntries([[key, value]])](#tocontainentrieskey--value)
+    - [.toContainAllEntries([[key, value]])](#tocontainallentrieskey--value)
+    - [.toContainAnyEntries([[key, value]])](#tocontainanyentrieskey--value)
+    - [.toBeExtensible()](#tobeextensible)
+    - [.toBeFrozen()](#tobefrozen)
+    - [.toBeSealed()](#tobesealed)
+  - [~~Promise~~](#promise)
+  - [String](#string)
+    - [.toBeString()](#tobestring)
+    - [.toBeHexadecimal(string)](#tobehexadecimal)
+    - [.toEqualCaseInsensitive(string)](#toequalcaseinsensitivestring)
+    - [.toStartWith(prefix)](#tostartwithprefix)
+    - [.toEndWith(suffix)](#toendwithsuffix)
+    - [.toInclude(substring)](#toincludesubstring)
+    - [.toIncludeRepeated(substring, times)](#toincluderepeatedsubstring--times)
+    - [.toIncludeMultiple([substring])](#toincludemultiplesubstring)
+- [Contributors](#contributors)
+- [LICENSE](#license)
+
+## Installation
+
+With npm:
+```sh
+npm install --save-dev jest-extended
+```
+
+With yarn:
+```sh
+yarn add -D jest-extended
+```
+
+## Setup
+
+Add jest-extended to your Jest setupTestFrameworkScriptFile configuration. [See for help](http://facebook.github.io/jest/docs/en/configuration.html#setuptestframeworkscriptfile-string)
+
+``` json
+"jest": {
+  "setupTestFrameworkScriptFile": "jest-extended"
+}
+```
+
+If you are already using another test framework, like [jest-chain](https://github.com/mattphillips/jest-chain), then you should create a test setup file and `require` each of the frameworks you are using.
+
+For example:
+
+```js
+// ./testSetup.js
+require('jest-extended');
+require('any other test framework libraries you are using');
+```
+
+Then in your Jest config:
+
+```json
+"jest": {
+  "setupTestFrameworkScriptFile": "./testSetup.js"
+}
+```
+
+## API
+
+#### .pass(message)
+
+_Note: Currently unimplemented_
+
+Passing assertion.
+
+```js
+expect().pass('should pass');
+```
+
+#### .fail(message)
+
+_Note: Currently unimplemented_
+
+Failing assertion.
+
+```js
+expect().fail('test should fail');
+```
+
+{{sandbox/matchers/toBeEmpty.test.js}}
+
+{{sandbox/matchers/toBeOneOf.test.js}}
+
+{{sandbox/matchers/toBeNil.test.js}}
+
+{{sandbox/matchers/toSatisfy.test.js}}
+
+### Array
+
+{{sandbox/matchers/array/toBeArray.test.js}}
+
+{{sandbox/matchers/array/toBeArrayOfSize.test.js}}
+
+{{sandbox/matchers/array/toIncludeAllMembers.test.js}}
+
+{{sandbox/matchers/array/toIncludeAnyMembers.test.js}}
+
+{{sandbox/matchers/array/toIncludeSameMembers.test.js}}
+
+{{sandbox/matchers/array/toSatisfyAll.test.js}}
+
+### Boolean
+
+{{sandbox/matchers/boolean/toBeBoolean.test.js}}
+
+{{sandbox/matchers/boolean/toBeTrue.test.js}}
+
+{{sandbox/matchers/boolean/toBeFalse.test.js}}
+
+### ~~Date~~
+
+Proposal in #117 (*under development*)
+
+{{sandbox/matchers/date/toBeDate.test.js}}
+
+{{sandbox/matchers/date/toBeValidDate.test.js}}
+
+{{sandbox/matchers/date/toBeAfter.test.js}}
+
+{{sandbox/matchers/date/toBeBefore.test.js}}
+
+### Function
+
+{{sandbox/matchers/function/toBeFunction.test.js}}
+
+### Mock
+
+#### .toHaveBeenCalledBefore()
+
+Use `.toHaveBeenCalledBefore` when checking if a `Mock` was called before another `Mock`.
+
+_Note: Required Jest version >=23_
+
+```js
+it('calls mock1 before mock2', () => {
+  const mock1 = jest.fn();
+  const mock2 = jest.fn();
+
+  mock1();
+  mock2();
+  mock1();
+
+  expect(mock1).toHaveBeenCalledBefore(mock2);
+});
+```
+
+#### .toHaveBeenCalledAfter()
+
+Use `.toHaveBeenCalledAfter` when checking if a `Mock` was called after another `Mock`.
+
+_Note: Required Jest version >=23_
+
+```js
+it('calls mock1 after mock2', () => {
+  const mock1 = jest.fn();
+  const mock2 = jest.fn();
+
+  mock2();
+  mock1();
+  mock2();
+
+  expect(mock1).toHaveBeenCalledAfter(mock2);
+});
+```
+
+### Number
+
+{{sandbox/matchers/number/toBeNumber.test.js}}
+
+{{sandbox/matchers/number/toBeNaN.test.js}}
+
+{{sandbox/matchers/number/toBeFinite.test.js}}
+
+{{sandbox/matchers/number/toBePositive.test.js}}
+
+{{sandbox/matchers/number/toBeNegative.test.js}}
+
+{{sandbox/matchers/number/toBeEven.test.js}}
+
+{{sandbox/matchers/number/toBeOdd.test.js}}
+
+{{sandbox/matchers/number/toBeWithin.test.js}}
+
+### Object
+
+{{sandbox/matchers/object/toBeObject.test.js}}
+
+{{sandbox/matchers/object/toContainKey.test.js}}
+
+{{sandbox/matchers/object/toContainKeys.test.js}}
+
+{{sandbox/matchers/object/toContainAllKeys.test.js}}
+
+{{sandbox/matchers/object/toContainAnyKeys.test.js}}
+
+{{sandbox/matchers/object/toContainValue.test.js}}
+
+{{sandbox/matchers/object/toContainValues.test.js}}
+
+{{sandbox/matchers/object/toContainAllValues.test.js}}
+
+{{sandbox/matchers/object/toContainAnyValues.test.js}}
+
+{{sandbox/matchers/object/toContainEntry.test.js}}
+
+{{sandbox/matchers/object/toContainEntries.test.js}}
+
+{{sandbox/matchers/object/toContainAllEntries.test.js}}
+
+{{sandbox/matchers/object/toContainAnyEntries.test.js}}
+
+{{sandbox/matchers/object/toBeExtensible.test.js}}
+
+#### .toBeFrozen()
+
+Use `.toBeFrozen` when checking if an object is frozen.
+
+```js
+test('passes when value is frozen', () => {
+  expect(Object.frozen({})).toBeFrozen();
+  expect({}).not.toBeFrozen();
+  expect(1).not.toBeFrozen();
+});
+```
+
+#### .toBeSealed()
+
+Use `.toBeSealed` when checking if an object is sealed.
+
+```js
+test('passes when value is sealed', () => {
+  expect(Object.seal({})).toBeSealed();
+  expect({}).not.toBeSealed();
+  expect(1).not.toBeSealed();
+});
+```
+
+### ~~Promise~~
+
+_No APIs proposed yet_
+
+### String
+
+{{sandbox/matchers/string/toBeString.test.js}}
+
+{{sandbox/matchers/string/toBeHexadecimal.test.js}}
+
+{{sandbox/matchers/string/toEqualCaseInsensitive.test.js}}
+
+{{sandbox/matchers/string/toStartWith.test.js}}
+
+{{sandbox/matchers/string/toEndWith.test.js}}
+
+{{sandbox/matchers/string/toInclude.test.js}}
+
+{{sandbox/matchers/string/toIncludeRepeated.test.js}}
+
+{{sandbox/matchers/string/toIncludeMultiple.test.js}}
+
+## Contributors
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+| [<img src="https://avatars0.githubusercontent.com/u/5610087?v=4" width="100px;"/><br /><sub>Matt Phillips</sub>](http://mattphillips.io)<br />[📝](#blog-mattphillips "Blogposts") [💻](https://github.com/mattphillips/jest-extended/commits?author=mattphillips "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=mattphillips "Documentation") [💡](#example-mattphillips "Examples") [🚇](#infra-mattphillips "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=mattphillips "Tests") | [<img src="https://avatars1.githubusercontent.com/u/611927?v=4" width="100px;"/><br /><sub>Stephen Bluck</sub>](https://github.com/stevebluck)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=stevebluck "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=stevebluck "Tests") | [<img src="https://avatars3.githubusercontent.com/u/5880416?v=4" width="100px;"/><br /><sub>Christoffer Hasselberg</sub>](https://github.com/stofolus)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=stofolus "Code") | [<img src="https://avatars1.githubusercontent.com/u/20847518?v=4" width="100px;"/><br /><sub>Brandon Newton</sub>](https://btnwtn.com)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=btnwtn "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=btnwtn "Documentation") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=btnwtn "Tests") | [<img src="https://avatars2.githubusercontent.com/u/4533277?v=4" width="100px;"/><br /><sub>Devan Patel</sub>](http://www.devanpatel.me)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=devanp92 "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=devanp92 "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/8472688?v=4" width="100px;"/><br /><sub>Gary Leutheuser</sub>](https://GaryLeutheuser.github.io)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=GaryLeutheuser "Code") | [<img src="https://avatars3.githubusercontent.com/u/24882614?v=4" width="100px;"/><br /><sub>Johan Lindgren</sub>](https://github.com/lindgr3n)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=lindgr3n "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=lindgr3n "Documentation") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=lindgr3n "Tests") |
+| :---: | :---: | :---: | :---: | :---: | :---: | :---: |
+| [<img src="https://avatars1.githubusercontent.com/u/159848?v=4" width="100px;"/><br /><sub>Andrew Hayward</sub>](http://andrewhayward.net)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=andrewhayward "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=andrewhayward "Tests") | [<img src="https://avatars3.githubusercontent.com/u/6209178?v=4" width="100px;"/><br /><sub>Oliver Schneider</sub>](https://ols.io)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=olsio "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=olsio "Tests") | [<img src="https://avatars1.githubusercontent.com/u/22359375?s=460&v=4" width="100px;"/><br /><sub>Tyle Whalen</sub>](https://github.com/tjwhalen16)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=tjwhalen16 "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=tjwhalen16 "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/17944339?v=4" width="100px;"/><br /><sub>Martius</sub>](https://github.com/martiuslim)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=martiuslim "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=martiuslim "Tests") | [<img src="https://avatars2.githubusercontent.com/u/10856932?v=4" width="100px;"/><br /><sub>Eli Collis</sub>](https://github.com/ecollis6)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=ecollis6 "Code") | [<img src="https://avatars0.githubusercontent.com/u/10706203?v=4" width="100px;"/><br /><sub>Marcin Lichwała</sub>](https://github.com/marcinlichwala)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=marcinlichwala "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=marcinlichwala "Tests") | [<img src="https://avatars3.githubusercontent.com/u/1984733?v=4" width="100px;"/><br /><sub>Massimo Prencipe</sub>](https://github.com/mprencipe)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=mprencipe "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=mprencipe "Tests") |
+| [<img src="https://avatars2.githubusercontent.com/u/33098064?v=4" width="100px;"/><br /><sub>mjmiles</sub>](https://github.com/mjmiles)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=mjmiles "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=mjmiles "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/13333582?v=4" width="100px;"/><br /><sub>Gary Meehan</sub>](https://github.com/garmeeh)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=garmeeh "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=garmeeh "Documentation") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=garmeeh "Tests") | [<img src="https://avatars2.githubusercontent.com/u/3191489?v=4" width="100px;"/><br /><sub>Fredrik Mäkilä</sub>](https://github.com/GitHug)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=GitHug "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=GitHug "Tests") | [<img src="https://avatars2.githubusercontent.com/u/9046616?v=4" width="100px;"/><br /><sub>Daniel Reinoso</sub>](http://kloc.io/)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=danielr18 "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=danielr18 "Tests") | [<img src="https://avatars1.githubusercontent.com/u/4359781?v=4" width="100px;"/><br /><sub>Chris Hut</sub>](https://github.com/tophernuts)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=tophernuts "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=tophernuts "Tests") | [<img src="https://avatars2.githubusercontent.com/u/1513183?v=4" width="100px;"/><br /><sub>Kelvin Ly</sub>](https://github.com/cactorium)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=cactorium "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=cactorium "Tests") | [<img src="https://avatars0.githubusercontent.com/u/11182826?v=4" width="100px;"/><br /><sub>Francis Ngo</sub>](https://github.com/francisngo)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=francisngo "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=francisngo "Tests") |
+| [<img src="https://avatars1.githubusercontent.com/u/10330923?v=4" width="100px;"/><br /><sub>Amish Shah</sub>](https://hydrabolt.me/)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=hydrabolt "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=hydrabolt "Tests") | [<img src="https://avatars3.githubusercontent.com/u/2045206?v=4" width="100px;"/><br /><sub>Dave Cooper</sub>](http://davecooper.org)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=grug "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=grug "Tests") | [<img src="https://avatars3.githubusercontent.com/u/3630495?v=4" width="100px;"/><br /><sub>Swann Polydor</sub>](https://github.com/soueuls)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=soueuls "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=soueuls "Tests") | [<img src="https://avatars1.githubusercontent.com/u/2027003?v=4" width="100px;"/><br /><sub>vikneshwar</sub>](https://github.com/vikneshwar)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=vikneshwar "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=vikneshwar "Tests") | [<img src="https://avatars1.githubusercontent.com/u/1243921?v=4" width="100px;"/><br /><sub>Budi Irawan</sub>](http://budiirawan.com)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=deerawan "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=deerawan "Tests") | [<img src="https://avatars2.githubusercontent.com/u/980783?v=4" width="100px;"/><br /><sub>Tejas Bubane</sub>](http://foss-geek.blogspot.com/)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=tejasbubane "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=tejasbubane "Tests") [📖](https://github.com/mattphillips/jest-extended/commits?author=tejasbubane "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/13134653?v=4" width="100px;"/><br /><sub>Subinoy Ghosh</sub>](https://github.com/subinoy7)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=subinoy7 "Code") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=subinoy7 "Tests") |
+| [<img src="https://avatars1.githubusercontent.com/u/1404810?v=4" width="100px;"/><br /><sub>Simen Bekkhus</sub>](https://github.com/SimenB)<br />[📖](https://github.com/mattphillips/jest-extended/commits?author=SimenB "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/49038?v=4" width="100px;"/><br /><sub>Orta</sub>](http://orta.io)<br />[📖](https://github.com/mattphillips/jest-extended/commits?author=orta "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/17221813?v=4" width="100px;"/><br /><sub>Tom</sub>](https://jsdevtom.com)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=jsdevtom "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=jsdevtom "Documentation") [💡](#example-jsdevtom "Examples") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=jsdevtom "Tests") | [<img src="https://avatars0.githubusercontent.com/u/15064535?v=4" width="100px;"/><br /><sub>Lucian Buzzo</sub>](https://github.com/LucianBuzzo)<br /> | [<img src="https://avatars3.githubusercontent.com/u/2997844?v=4" width="100px;"/><br /><sub>Thiago Delgado Pinto</sub>](https://github.com/thiagodp)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=thiagodp "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=thiagodp "Documentation") [💡](#example-thiagodp "Examples") [🤔](#ideas-thiagodp "Ideas, Planning, & Feedback") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=thiagodp "Tests") | [<img src="https://avatars0.githubusercontent.com/u/3042904?v=4" width="100px;"/><br /><sub>Ragnar Laud</sub>](https://github.com/xprn)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=xprn "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=xprn "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/3047126?v=4" width="100px;"/><br /><sub>Luiz Américo</sub>](https://github.com/blikblum)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=blikblum "Code") |
+| [<img src="https://avatars0.githubusercontent.com/u/615334?v=4" width="100px;"/><br /><sub>Frederick Fogerty</sub>](https://github.com/frederickfogerty)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=frederickfogerty "Code") [🤔](#ideas-frederickfogerty "Ideas, Planning, & Feedback") | [<img src="https://avatars1.githubusercontent.com/u/10714808?v=4" width="100px;"/><br /><sub>Benjamin Kay</sub>](https://github.com/benjaminkay93)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=benjaminkay93 "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=benjaminkay93 "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/868844?v=4" width="100px;"/><br /><sub>Gilles De Mey</sub>](https://demey.io)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=gillesdemey "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=gillesdemey "Documentation") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=gillesdemey "Tests") | [<img src="https://avatars0.githubusercontent.com/u/50928?v=4" width="100px;"/><br /><sub>Deniz Dogan</sub>](https://github.com/denizdogan)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=denizdogan "Code") | [<img src="https://avatars1.githubusercontent.com/u/13043635?v=4" width="100px;"/><br /><sub>Mikey Powers</sub>](https://github.com/mvpowers)<br />[💻](https://github.com/mattphillips/jest-extended/commits?author=mvpowers "Code") [📖](https://github.com/mattphillips/jest-extended/commits?author=mvpowers "Documentation") [⚠️](https://github.com/mattphillips/jest-extended/commits?author=mvpowers "Tests") |
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+## LICENSE
+
+[MIT](/LICENSE)
diff --git a/docs/ROADMAP.md b/docs/ROADMAP.md
deleted file mode 100644
index 7765c510..00000000
--- a/docs/ROADMAP.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Project Roadmap
-
-## Want something added? Feel free to open an issue :)
\ No newline at end of file
diff --git a/docs/sandbox/.prettierrc b/docs/sandbox/.prettierrc
new file mode 100644
index 00000000..d271427d
--- /dev/null
+++ b/docs/sandbox/.prettierrc
@@ -0,0 +1,11 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": true,
+  "jsxBracketSameLine": false,
+  "fluid": false
+}
\ No newline at end of file
diff --git a/docs/sandbox/matchers/array/toBeArray.test.js b/docs/sandbox/matchers/array/toBeArray.test.js
new file mode 100644
index 00000000..da3b41ca
--- /dev/null
+++ b/docs/sandbox/matchers/array/toBeArray.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeArray()
+
+Use `.toBeArray` when checking if a value is an `Array`.
+*/
+
+test('passes when value is an array', () => {
+  expect([]).toBeArray();
+  expect([1]).toBeArray();
+  expect(true).not.toBeArray();
+});
diff --git a/docs/sandbox/matchers/array/toBeArrayOfSize.test.js b/docs/sandbox/matchers/array/toBeArrayOfSize.test.js
new file mode 100644
index 00000000..aa60f62a
--- /dev/null
+++ b/docs/sandbox/matchers/array/toBeArrayOfSize.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeArrayOfSize()
+
+Use `.toBeArrayOfSize` when checking if a value is an `Array` of size x.
+*/
+
+test('passes when value is an array', () => {
+  expect([]).toBeArrayOfSize(0);
+  expect([1]).toBeArrayOfSize(1);
+  expect(true).not.toBeArrayOfSize(1);
+});
diff --git a/docs/sandbox/matchers/array/toIncludeAllMembers.test.js b/docs/sandbox/matchers/array/toIncludeAllMembers.test.js
new file mode 100644
index 00000000..e5a074ca
--- /dev/null
+++ b/docs/sandbox/matchers/array/toIncludeAllMembers.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toIncludeAllMembers([members])
+
+Use `.toIncludeAllMembers` when checking if an `Array` contains all of the same members of a given set.
+*/
+
+test('passes when given array values match the members of the set', () => {
+  expect([1, 2, 3]).toIncludeAllMembers([2, 1, 3]);
+  expect([1, 2, 2]).toIncludeAllMembers([2, 1]);
+});
diff --git a/docs/sandbox/matchers/array/toIncludeAnyMembers.test.js b/docs/sandbox/matchers/array/toIncludeAnyMembers.test.js
new file mode 100644
index 00000000..cd3a2c90
--- /dev/null
+++ b/docs/sandbox/matchers/array/toIncludeAnyMembers.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toIncludeAnyMembers([members])
+
+Use `.toIncludeAnyMembers` when checking if an `Array` contains any of the members of a given set.
+*/
+
+test('passes when given array values match any of the members in the set', () => {
+  expect([1, 2, 3]).toIncludeAnyMembers([2, 1, 3]);
+  expect([1, 2, 2]).toIncludeAnyMembers([2]);
+  expect([1, 2, 2]).not.toIncludeAnyMembers([3]);
+});
diff --git a/docs/sandbox/matchers/array/toIncludeSameMembers.test.js b/docs/sandbox/matchers/array/toIncludeSameMembers.test.js
new file mode 100644
index 00000000..d730d46d
--- /dev/null
+++ b/docs/sandbox/matchers/array/toIncludeSameMembers.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toIncludeSameMembers([members])
+
+Use `.toIncludeSameMembers` when checking if two arrays contain equal values, in any order.
+*/
+
+test('passes when arrays match in a different order', () => {
+  expect([1, 2, 3]).toIncludeSameMembers([3, 1, 2]);
+  expect([{ foo: 'bar' }, { baz: 'qux' }]).toIncludeSameMembers([{ baz: 'qux' }, { foo: 'bar' }]);
+});
diff --git a/docs/sandbox/matchers/array/toSatisfyAll.test.js b/docs/sandbox/matchers/array/toSatisfyAll.test.js
new file mode 100644
index 00000000..2298cbbd
--- /dev/null
+++ b/docs/sandbox/matchers/array/toSatisfyAll.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toSatisfyAll(predicate)
+
+Use `.toSatisfyAll` when you want to use a custom matcher by supplying a predicate function that returns a `Boolean` for all values in an array.
+*/
+
+test('passes when all values in array pass given predicate', () => {
+  const isOdd = el => el % 2 === 1;
+  expect([1, 3, 5, 7]).toSatisfyAll(isOdd);
+  expect([1, 3, 4, 5, 7]).not.toSatisfyAll(isOdd);
+});
diff --git a/docs/sandbox/matchers/boolean/toBeBoolean.test.js b/docs/sandbox/matchers/boolean/toBeBoolean.test.js
new file mode 100644
index 00000000..3543ca61
--- /dev/null
+++ b/docs/sandbox/matchers/boolean/toBeBoolean.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeBoolean()
+
+Use `.toBeBoolean` when checking if a value is a `Boolean`.
+*/
+
+test('passes when value is a boolean', () => {
+  expect(false).toBeBoolean();
+  expect(true).toBeBoolean();
+  expect(1 === 1).toBeBoolean();
+  expect(1).not.toBeBoolean();
+});
diff --git a/docs/sandbox/matchers/boolean/toBeFalse.test.js b/docs/sandbox/matchers/boolean/toBeFalse.test.js
new file mode 100644
index 00000000..5b752476
--- /dev/null
+++ b/docs/sandbox/matchers/boolean/toBeFalse.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toBeFalse()
+
+Use `.toBeFalse` when checking a value is equal (===) to `false`.
+*/
+
+test('returns false', () => {
+  expect(false).toBeFalse();
+  expect(true).not.toBeFalse();
+});
diff --git a/docs/sandbox/matchers/boolean/toBeTrue.test.js b/docs/sandbox/matchers/boolean/toBeTrue.test.js
new file mode 100644
index 00000000..69ee3746
--- /dev/null
+++ b/docs/sandbox/matchers/boolean/toBeTrue.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeTrue()
+
+Use `.toBeTrue` when checking a value is equal (===) to `true`.
+*/
+
+test('is jest cool', () => {
+  const isJestCool = () => true;
+  expect(isJestCool()).toBeTrue();
+  expect(false).not.toBeTrue();
+});
diff --git a/docs/sandbox/matchers/date/toBeAfter.test.js b/docs/sandbox/matchers/date/toBeAfter.test.js
new file mode 100644
index 00000000..0b9ccd4f
--- /dev/null
+++ b/docs/sandbox/matchers/date/toBeAfter.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toBeAfter(date)
+
+Use `.toBeAfter` when checking if a date occurs after `date`.
+*/
+
+test('passes when input is after date', () => {
+  expect(new Date('01/01/2019')).toBeAfter(new Date('01/01/2018'));
+  expect('01/01/2018').not.toBeAfter(new Date('01/01/2019'));
+});
diff --git a/docs/sandbox/matchers/date/toBeBefore.test.js b/docs/sandbox/matchers/date/toBeBefore.test.js
new file mode 100644
index 00000000..b43dce65
--- /dev/null
+++ b/docs/sandbox/matchers/date/toBeBefore.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toBeBefore(date)
+
+Use `.toBeBefore` when checking if a date occurs before `date`.
+*/
+
+test('passes when input is before date', () => {
+  expect(new Date('01/01/2018')).toBeBefore(new Date('01/01/2019'));
+  expect('01/01/2019').not.toBeBefore(new Date('01/01/2018'));
+});
diff --git a/docs/sandbox/matchers/date/toBeDate.test.js b/docs/sandbox/matchers/date/toBeDate.test.js
new file mode 100644
index 00000000..9f432340
--- /dev/null
+++ b/docs/sandbox/matchers/date/toBeDate.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeDate()
+
+Use `.toBeDate` when checking if a value is a `Date`.
+*/
+
+test('passes when value is a date', () => {
+  expect(new Date()).toBeDate();
+  expect('01/01/2018').not.toBeDate();
+  expect(new Date('01/01/2018')).toBeDate();
+  expect(undefined).not.toBeDate();
+});
diff --git a/docs/sandbox/matchers/date/toBeValidDate.test.js b/docs/sandbox/matchers/date/toBeValidDate.test.js
new file mode 100644
index 00000000..0aa4b35f
--- /dev/null
+++ b/docs/sandbox/matchers/date/toBeValidDate.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toBeValidDate()
+
+Use `.toBeValidDate` when checking if a given `Date` object is valid.
+*/
+
+test('passes when Date is valid', () => {
+  expect(new Date()).toBeValidDate();
+  expect('01/01/2018').not.toBeValidDate();
+  expect(new Date('01/01/2018')).toBeValidDate();
+  expect(new Date('01/90/2018')).not.toBeValidDate();
+  expect(undefined).not.toBeValidDate();
+});
diff --git a/docs/sandbox/matchers/function/toBeFunction.test.js b/docs/sandbox/matchers/function/toBeFunction.test.js
new file mode 100644
index 00000000..0167a002
--- /dev/null
+++ b/docs/sandbox/matchers/function/toBeFunction.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeFunction()
+
+Use `.toBeFunction` when checking if a value is a `Function`.
+*/
+
+test('passes when value is a function', () => {
+  function noop() {}
+  expect(() => {}).toBeFunction();
+  expect(noop).toBeFunction();
+  expect(true).not.toBeFunction();
+});
diff --git a/docs/sandbox/matchers/number/toBeEven.test.js b/docs/sandbox/matchers/number/toBeEven.test.js
new file mode 100644
index 00000000..5a75d73b
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeEven.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeEven()
+
+Use `.toBeEven` when checking if a value is an even `Number`.
+*/
+
+test('passes when value is an even number', () => {
+  expect(2).toBeEven();
+  expect(1).not.toBeEven();
+  expect(NaN).not.toBeEven();
+});
diff --git a/docs/sandbox/matchers/number/toBeFinite.test.js b/docs/sandbox/matchers/number/toBeFinite.test.js
new file mode 100644
index 00000000..2fb8b373
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeFinite.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeFinite()
+
+Use `.toBeFinite` when checking if a value is a `Number`, not `NaN` or `Infinity`.
+*/
+
+test('passes when value is a finite number', () => {
+  expect(1).toBeFinite();
+  expect(Infinity).not.toBeFinite();
+  expect(NaN).not.toBeFinite();
+});
diff --git a/docs/sandbox/matchers/number/toBeNaN.test.js b/docs/sandbox/matchers/number/toBeNaN.test.js
new file mode 100644
index 00000000..7ffb218d
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeNaN.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toBeNaN()
+
+Use `.toBeNaN` when checking a value is `NaN`.
+*/
+
+test('passes when value is NaN', () => {
+  expect(NaN).toBeNaN();
+  expect(1).not.toBeNaN();
+});
diff --git a/docs/sandbox/matchers/number/toBeNegative.test.js b/docs/sandbox/matchers/number/toBeNegative.test.js
new file mode 100644
index 00000000..0acba5bb
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeNegative.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeNegative()
+
+Use `.toBeNegative` when checking if a value is a negative `Number`.
+*/
+
+test('passes when value is a negative number', () => {
+  expect(-1).toBeNegative();
+  expect(-Infinity).not.toBeNegative();
+  expect(1).not.toBeNegative();
+  expect(NaN).not.toBeNegative();
+});
diff --git a/docs/sandbox/matchers/number/toBeNumber.test.js b/docs/sandbox/matchers/number/toBeNumber.test.js
new file mode 100644
index 00000000..1efac018
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeNumber.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeNumber()
+
+Use `.toBeNumber` when checking if a value is a `Number`.
+*/
+
+test('passes when value is a number', () => {
+  expect(1).toBeNumber();
+  expect(NaN).toBeNumber();
+  expect(Infinity).toBeNumber();
+  expect(true).not.toBeNumber();
+});
diff --git a/docs/sandbox/matchers/number/toBeOdd.test.js b/docs/sandbox/matchers/number/toBeOdd.test.js
new file mode 100644
index 00000000..e7c2ed64
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeOdd.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeOdd()
+
+Use `.toBeOdd` when checking if a value is an odd `Number`.
+*/
+
+test('passes when value is an odd number', () => {
+  expect(1).toBeOdd();
+  expect(2).not.toBeOdd();
+  expect(NaN).not.toBeOdd();
+});
diff --git a/docs/sandbox/matchers/number/toBePositive.test.js b/docs/sandbox/matchers/number/toBePositive.test.js
new file mode 100644
index 00000000..2fc6bdb1
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBePositive.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBePositive()
+
+Use `.toBePositive` when checking if a value is a positive `Number`.
+*/
+
+test('passes when value is a positive number', () => {
+  expect(1).toBePositive();
+  expect(Infinity).not.toBePositive();
+  expect(-1).not.toBePositive();
+  expect(NaN).not.toBePositive();
+});
diff --git a/docs/sandbox/matchers/number/toBeWithin.test.js b/docs/sandbox/matchers/number/toBeWithin.test.js
new file mode 100644
index 00000000..4859fb33
--- /dev/null
+++ b/docs/sandbox/matchers/number/toBeWithin.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeWithin(start, end)
+
+Use `.toBeWithin` when checking if a number is in between the given bounds of: start (inclusive) and end (exclusive).
+*/
+
+test('passes when number is within given bounds', () => {
+  expect(1).toBeWithin(1, 3);
+  expect(2).toBeWithin(1, 3);
+  expect(3).not.toBeWithin(1, 3);
+});
diff --git a/docs/sandbox/matchers/object/toBeExtensible.test.js b/docs/sandbox/matchers/object/toBeExtensible.test.js
new file mode 100644
index 00000000..e75ddd98
--- /dev/null
+++ b/docs/sandbox/matchers/object/toBeExtensible.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toBeExtensible()
+
+Use `.toBeExtensible` when checking if an object is extensible.
+*/
+
+test('passes when value is extensible', () => {
+  expect({ a: 1 }).toBeExtensible();
+  expect(1).not.toBeExtensible();
+});
diff --git a/docs/sandbox/matchers/object/toBeObject.test.js b/docs/sandbox/matchers/object/toBeObject.test.js
new file mode 100644
index 00000000..e772de9d
--- /dev/null
+++ b/docs/sandbox/matchers/object/toBeObject.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeObject()
+
+Use `.toBeObject` when checking if a value is an `Object`.
+*/
+
+test('passes when value is an object', () => {
+  expect({}).toBeObject();
+  expect({ a: 'hello' }).toBeObject();
+  expect(true).not.toBeObject();
+});
diff --git a/docs/sandbox/matchers/object/toContainAllEntries.test.js b/docs/sandbox/matchers/object/toContainAllEntries.test.js
new file mode 100644
index 00000000..e6ae094a
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainAllEntries.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toContainAllEntries([[key, value]])
+
+Use `.toContainAllEntries` when checking if an object only contains all of the provided entries.
+*/
+
+test('passes when object only contains all of the given entries', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainAllEntries([['a', 'foo'], ['b', 'bar'], ['c', 'baz']]);
+  expect(o).not.toContainAllEntries([['a', 'foo'], ['b', 'bar']]);
+});
diff --git a/docs/sandbox/matchers/object/toContainAllKeys.test.js b/docs/sandbox/matchers/object/toContainAllKeys.test.js
new file mode 100644
index 00000000..ef897a32
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainAllKeys.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toContainAllKeys([keys])
+
+Use `.toContainAllKeys` when checking if an object only contains all of the provided keys.
+*/
+
+test('passes when object only contains all keys', () => {
+  const o = { a: 'hello', b: 'world' };
+  expect(o).toContainAllKeys(['a', 'b']);
+  expect(o).toContainAllKeys(['b', 'a']);
+  expect(o).not.toContainAllKeys(['b']);
+});
diff --git a/docs/sandbox/matchers/object/toContainAllValues.test.js b/docs/sandbox/matchers/object/toContainAllValues.test.js
new file mode 100644
index 00000000..2807becd
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainAllValues.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toContainAllValues([values])
+
+Use `.toContainAllValues` when checking if an object only contains all of the provided values.
+*/
+
+test('passes when object only contains all of the given values', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainAllValues(['foo', 'bar', 'baz']);
+  expect(o).toContainAllValues(['baz', 'bar', 'foo']);
+  expect(o).not.toContainAllValues(['bar', 'foo']);
+});
diff --git a/docs/sandbox/matchers/object/toContainAnyEntries.test.js b/docs/sandbox/matchers/object/toContainAnyEntries.test.js
new file mode 100644
index 00000000..04e51b1b
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainAnyEntries.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toContainAnyEntries([[key, value]])
+
+Use `.toContainAnyEntries` when checking if an object contains at least one of the provided entries.
+*/
+
+test('passes when object contains at least one of the given entries', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainAnyEntries([['a', 'qux'], ['a', 'foo']]);
+  expect(o).toContainAnyEntries([['a', 'qux'], ['b', 'bar']]);
+  expect(o).toContainAnyEntries([['a', 'qux'], ['c', 'baz']]);
+  expect(o).not.toContainAnyEntries([['d', 'qux']]);
+});
diff --git a/docs/sandbox/matchers/object/toContainAnyKeys.test.js b/docs/sandbox/matchers/object/toContainAnyKeys.test.js
new file mode 100644
index 00000000..25e64b73
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainAnyKeys.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toContainAnyKeys([keys])
+
+Use `.toContainAnyKeys` when checking if an object contains at least one of the provided keys.
+*/
+
+test('passes when object contains at least one matching key', () => {
+  const o = { a: 'hello', b: 'world' };
+  expect(o).toContainAnyKeys(['a']);
+  expect(o).toContainAnyKeys(['b']);
+  expect(o).toContainAnyKeys(['b', 'c']);
+  expect(o).not.toContainAnyKeys(['c']);
+});
diff --git a/docs/sandbox/matchers/object/toContainAnyValues.test.js b/docs/sandbox/matchers/object/toContainAnyValues.test.js
new file mode 100644
index 00000000..d8d04bd9
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainAnyValues.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toContainAnyValues([values])
+
+Use `.toContainAnyValues` when checking if an object contains at least one of the provided values.
+*/
+
+test('passes when object contains at least one of the given values', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainAnyValues(['qux', 'foo']);
+  expect(o).toContainAnyValues(['qux', 'bar']);
+  expect(o).toContainAnyValues(['qux', 'baz']);
+  expect(o).not.toContainAnyValues(['qux']);
+});
diff --git a/docs/sandbox/matchers/object/toContainEntries.test.js b/docs/sandbox/matchers/object/toContainEntries.test.js
new file mode 100644
index 00000000..8ee7c728
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainEntries.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toContainEntries([[key, value]])
+
+Use `.toContainEntries` when checking if an object contains all of the provided entries.
+*/
+
+test('passes when object contains all of the given entries', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainEntries([['a', 'foo']]);
+  expect(o).toContainEntries([['c', 'baz'], ['a', 'foo']]);
+  expect(o).not.toContainEntries([['b', 'qux'], ['a', 'foo']]);
+});
diff --git a/docs/sandbox/matchers/object/toContainEntry.test.js b/docs/sandbox/matchers/object/toContainEntry.test.js
new file mode 100644
index 00000000..e75df796
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainEntry.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toContainEntry([key, value])
+
+Use `.toContainEntry` when checking if an object contains the provided entry.
+*/
+
+test('passes when object contains given entry', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainEntry(['a', 'foo']);
+  expect(o).toContainEntry(['b', 'bar']);
+  expect(o).toContainEntry(['c', 'baz']);
+  expect(o).not.toContainEntry(['a', 'qux']);
+});
diff --git a/docs/sandbox/matchers/object/toContainKey.test.js b/docs/sandbox/matchers/object/toContainKey.test.js
new file mode 100644
index 00000000..b8bb5e7b
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainKey.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toContainKey(key)
+
+Use `.toContainKey` when checking if an object contains the provided key.
+*/
+
+test('passes when object contains the given key', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainKey('a');
+  expect(o).toContainKey('b');
+  expect(o).toContainKey('c');
+  expect(o).not.toContainKey('d');
+});
diff --git a/docs/sandbox/matchers/object/toContainKeys.test.js b/docs/sandbox/matchers/object/toContainKeys.test.js
new file mode 100644
index 00000000..3b2ddb01
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainKeys.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toContainKeys([keys])
+
+Use `.toContainKeys` when checking if an object has all of the provided keys.
+*/
+
+test('passes when object contains all keys', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainKeys(['a', 'b']);
+  expect(o).toContainKeys(['b', 'c']);
+  expect(o).not.toContainKeys(['d']);
+});
diff --git a/docs/sandbox/matchers/object/toContainValue.test.js b/docs/sandbox/matchers/object/toContainValue.test.js
new file mode 100644
index 00000000..400ad039
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainValue.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toContainValue(value)
+
+Use `.toContainValue` when checking if an object contains the provided value.
+*/
+
+test('passes when object contains given value', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainValue('foo');
+  expect(o).toContainValue('bar');
+  expect(o).not.toContainValue('qux');
+});
diff --git a/docs/sandbox/matchers/object/toContainValues.test.js b/docs/sandbox/matchers/object/toContainValues.test.js
new file mode 100644
index 00000000..5e92fdbc
--- /dev/null
+++ b/docs/sandbox/matchers/object/toContainValues.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toContainValues([values])
+
+Use `.toContainValues` when checking if an object contains all of the provided values.
+*/
+
+test('passes when object contains all of the given values', () => {
+  const o = { a: 'foo', b: 'bar', c: 'baz' };
+  expect(o).toContainValues(['foo']);
+  expect(o).toContainValues(['baz', 'bar']);
+  expect(o).not.toContainValues(['qux', 'foo']);
+});
diff --git a/docs/sandbox/matchers/string/toBeHexadecimal.test.js b/docs/sandbox/matchers/string/toBeHexadecimal.test.js
new file mode 100644
index 00000000..79633951
--- /dev/null
+++ b/docs/sandbox/matchers/string/toBeHexadecimal.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeHexadecimal(string)
+
+Use `.toBeHexadecimal` when checking if a value is a valid HTML hexadecimal color.
+*/
+
+test('passes when value is a valid hexadecimal', () => {
+  expect('#abc123').toBeHexadecimal();
+  expect('#FFF').toBeHexadecimal();
+  expect('#000000').toBeHexadecimal();
+  expect('#123ffg').not.toBeHexadecimal();
+});
diff --git a/docs/sandbox/matchers/string/toBeString.test.js b/docs/sandbox/matchers/string/toBeString.test.js
new file mode 100644
index 00000000..f01549cc
--- /dev/null
+++ b/docs/sandbox/matchers/string/toBeString.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toBeString()
+
+Use `.toBeString` when checking if a value is a `String`.
+*/
+
+test('passes when value is a string', () => {
+  expect('').toBeString();
+  expect('hello').toBeString();
+  expect(new String('hello')).toBeString();
+  expect(true).not.toBeString();
+});
diff --git a/docs/sandbox/matchers/string/toEndWith.test.js b/docs/sandbox/matchers/string/toEndWith.test.js
new file mode 100644
index 00000000..1da5df7f
--- /dev/null
+++ b/docs/sandbox/matchers/string/toEndWith.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toEndWith(suffix)
+
+Use `.toEndWith` when checking if a `String` ends with a given `String` suffix.
+*/
+
+test('passes when value is ends with given string', () => {
+  expect('hello world').toEndWith('world');
+  expect('hello world').not.toEndWith('hello');
+});
diff --git a/docs/sandbox/matchers/string/toEqualCaseInsensitive.test.js b/docs/sandbox/matchers/string/toEqualCaseInsensitive.test.js
new file mode 100644
index 00000000..194fd6ee
--- /dev/null
+++ b/docs/sandbox/matchers/string/toEqualCaseInsensitive.test.js
@@ -0,0 +1,13 @@
+/*
+#### .toEqualCaseInsensitive(string)
+
+Use `.toEqualCaseInsensitive` when checking if a string is equal (===) to another ignoring the casing of both strings.
+*/
+
+test('passes when strings are equal ignoring case', () => {
+  expect('hello world').toEqualCaseInsensitive('hello world');
+  expect('hello WORLD').toEqualCaseInsensitive('HELLO world');
+  expect('HELLO WORLD').toEqualCaseInsensitive('hello world');
+  expect('hello world').toEqualCaseInsensitive('HELLO WORLD');
+  expect('hello world').not.toEqualCaseInsensitive('hello');
+});
diff --git a/docs/sandbox/matchers/string/toInclude.test.js b/docs/sandbox/matchers/string/toInclude.test.js
new file mode 100644
index 00000000..bf484e7a
--- /dev/null
+++ b/docs/sandbox/matchers/string/toInclude.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toInclude(substring)
+
+Use `.toInclude` when checking if a `String` includes the given `String` substring.
+*/
+
+test('passes when value includes substring', () => {
+  expect('hello world').toInclude('ell');
+  expect('hello world').not.toInclude('bob');
+});
diff --git a/docs/sandbox/matchers/string/toIncludeMultiple.test.js b/docs/sandbox/matchers/string/toIncludeMultiple.test.js
new file mode 100644
index 00000000..7980e7e2
--- /dev/null
+++ b/docs/sandbox/matchers/string/toIncludeMultiple.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toIncludeMultiple([substring])
+
+Use `.toIncludeMultiple` when checking if a `String` includes all of the given substrings.
+*/
+
+test('passes when value includes all substrings', () => {
+  expect('hello world').toIncludeMultiple(['world', 'hello']);
+  expect('hello world').not.toIncludeMultiple(['world', 'hello', 'bob']);
+});
diff --git a/docs/sandbox/matchers/string/toIncludeRepeated.test.js b/docs/sandbox/matchers/string/toIncludeRepeated.test.js
new file mode 100644
index 00000000..6e3327d1
--- /dev/null
+++ b/docs/sandbox/matchers/string/toIncludeRepeated.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toIncludeRepeated(substring, times)
+
+Use `.toIncludeRepeated` when checking if a `String` includes the given `String` substring the correct number of times.
+*/
+
+test('passes when value includes substring n times', () => {
+  expect('hello hello world').toIncludeRepeated('hello', 2);
+  expect('hello hello world').not.toIncludeRepeated('hello', 1);
+});
diff --git a/docs/sandbox/matchers/string/toStartWith.test.js b/docs/sandbox/matchers/string/toStartWith.test.js
new file mode 100644
index 00000000..cb4a7542
--- /dev/null
+++ b/docs/sandbox/matchers/string/toStartWith.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toStartWith(prefix)
+
+Use `.toStartWith` when checking if a `String` starts with a given `String` prefix.
+*/
+
+test('passes when value is starts with given string', () => {
+  expect('hello world').toStartWith('hello');
+  expect('hello world').not.toStartWith('world');
+});
diff --git a/docs/sandbox/matchers/toBeEmpty.test.js b/docs/sandbox/matchers/toBeEmpty.test.js
new file mode 100644
index 00000000..5fb6d13b
--- /dev/null
+++ b/docs/sandbox/matchers/toBeEmpty.test.js
@@ -0,0 +1,20 @@
+/*
+#### .toBeEmpty()
+
+Use `.toBeEmpty` when checking if a `String` `''`, `Array` `[]` or `Object` `{}` is empty.
+*/
+
+test('passes when given an empty string', () => {
+  expect('').toBeEmpty();
+  expect('hello').not.toBeEmpty();
+});
+
+test('passes when given an empty array', () => {
+  expect([]).toBeEmpty();
+  expect(['hello']).not.toBeEmpty();
+});
+
+test('passes when given an empty object', () => {
+  expect({}).toBeEmpty();
+  expect({ hello: 'world' }).not.toBeEmpty();
+});
diff --git a/docs/sandbox/matchers/toBeNil.test.js b/docs/sandbox/matchers/toBeNil.test.js
new file mode 100644
index 00000000..829a040d
--- /dev/null
+++ b/docs/sandbox/matchers/toBeNil.test.js
@@ -0,0 +1,11 @@
+/*
+#### .toBeNil()
+
+Use `.toBeNil` when checking a value is `null` or `undefined`.
+*/
+
+test('passes when value is null or undefined', () => {
+  expect(null).toBeNil();
+  expect(undefined).toBeNil();
+  expect(true).not.toBeNil();
+});
diff --git a/docs/sandbox/matchers/toBeOneOf.test.js b/docs/sandbox/matchers/toBeOneOf.test.js
new file mode 100644
index 00000000..1f9a718a
--- /dev/null
+++ b/docs/sandbox/matchers/toBeOneOf.test.js
@@ -0,0 +1,10 @@
+/*
+#### .toBeOneOf([members])
+
+Use `.toBeOneOf` when checking if a value is a member of a given `Array`.
+*/
+
+test('passes when value is in given array', () => {
+  expect(1).toBeOneOf([1, 2, 3]);
+  expect(4).not.toBeOneOf([1, 2, 3]);
+});
diff --git a/docs/sandbox/matchers/toSatisfy.test.js b/docs/sandbox/matchers/toSatisfy.test.js
new file mode 100644
index 00000000..81228f2e
--- /dev/null
+++ b/docs/sandbox/matchers/toSatisfy.test.js
@@ -0,0 +1,12 @@
+/*
+#### .toSatisfy(predicate)
+
+Use `.toSatisfy` when you want to use a custom matcher by supplying a predicate function that returns a `Boolean`.
+*/
+
+test('passes when value passes given predicate', () => {
+  const greaterThanOneButNotThree = n => n > 1 && n !== 3;
+  expect(100).toSatisfy(greaterThanOneButNotThree);
+  expect(0).not.toSatisfy(greaterThanOneButNotThree);
+  expect(3).not.toSatisfy(greaterThanOneButNotThree);
+});
diff --git a/docs/sandbox/package.json b/docs/sandbox/package.json
new file mode 100644
index 00000000..d4428602
--- /dev/null
+++ b/docs/sandbox/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "jest-extended-sandbox",
+  "version": "1.0.0",
+  "homepage": "https://github.com/jest-community/jest-extended",
+  "main": "setup.js",
+  "dependencies": {
+    "babel-jest": "20.0.3",
+    "jest": "20.0.4",
+    "jest-extended": "0.9.0"
+  },
+  "keywords": [
+    "jest",
+    "jest-extended",
+    "repl",
+    "sandbox",
+    "codesandbox"
+  ],
+  "description": "A sandbox repl of available jest-extended matchers."
+}
\ No newline at end of file
diff --git a/docs/sandbox/sandbox.config.json b/docs/sandbox/sandbox.config.json
new file mode 100644
index 00000000..6f1a1aeb
--- /dev/null
+++ b/docs/sandbox/sandbox.config.json
@@ -0,0 +1,5 @@
+{
+  "infiniteLoopProtection": true,
+  "hardReloadOnChange": false,
+  "view": "tests"
+}
\ No newline at end of file
diff --git a/docs/sandbox/setup.js b/docs/sandbox/setup.js
new file mode 100644
index 00000000..3b7aff06
--- /dev/null
+++ b/docs/sandbox/setup.js
@@ -0,0 +1,2 @@
+import je from 'jest-extended/dist/matchers';
+expect.extend(je);
diff --git a/package.json b/package.json
index fa92ea6e..3b13d035 100644
--- a/package.json
+++ b/package.json
@@ -14,12 +14,13 @@
     "build": "babel src -d dist --ignore *.test.js",
     "contributor": "all-contributors add",
     "contributor:gen": "all-contributors generate",
+    "generate-readme": "node scripts/readme.js",
     "lint": "eslint src",
     "lint:fix": "yarn lint -- --fix",
     "prepublishOnly": "yarn build",
     "precommit": "lint-staged",
     "prettier": "prettier 'src/**/*.js' --write --single-quote=true --print-width=120",
-    "test": "jest",
+    "test": "jest src",
     "test:coverage": "yarn test -- --coverage",
     "test:report": "codecov",
     "test:watch": "yarn test -- --watch"
diff --git a/scripts/readme.js b/scripts/readme.js
new file mode 100644
index 00000000..8602b829
--- /dev/null
+++ b/scripts/readme.js
@@ -0,0 +1,45 @@
+const readline = require('readline');
+const fs = require('fs');
+const path = require('path');
+
+const ROOT = path.resolve(__dirname, '..');
+const DOCS = path.resolve(ROOT, 'docs');
+
+const TEMPLATE_PATH = `${DOCS}/README.template.md`;
+const README_PATH = `${ROOT}/README.md`;
+
+const IMPORT_PATTERN = new RegExp(/{{(\w|\/)+\.test.js}}/g);
+const IMPORT_START = /{/g;
+const IMPORT_END = /}/g;
+const COMMENT_START = '/*';
+const COMMENT_END = '*/';
+
+const SANDBOX_URL = 'https://codesandbox.io/s/github/jest-community/jest-extended/tree/master/docs/sandbox';
+const SANDBOX_DIR = 'sandbox';
+const ESCAPED_SLASH = '%2F';
+
+const rl = readline.createInterface({ input: fs.createReadStream(TEMPLATE_PATH) });
+
+let readme = '';
+
+rl
+  .on('line', line => {
+    if (IMPORT_PATTERN.test(line)) {
+      const file = line.replace(IMPORT_START, '').replace(IMPORT_END, '');
+      const slugs = file.split('/');
+      const matcher = slugs[slugs.length - 1].replace('.test.js', '');
+      const module = file.replace(SANDBOX_DIR, '').replace(/\//g, ESCAPED_SLASH);
+      const contents = fs.readFileSync(`${DOCS}/${file}`, 'utf-8');
+      const [comments, code] = contents.split(COMMENT_END);
+
+      readme += comments.split(COMMENT_START)[1].trim() + '\n';
+      readme += '\n```js\n' + `${code.trim()}\n` + '```\n';
+      readme += `\n[Open ${matcher} in REPL](${SANDBOX_URL}?module=${module})\n`;
+      return;
+    }
+
+    readme += `${line}\n`;
+  })
+  .on('close', () => {
+    fs.writeFileSync(README_PATH, readme);
+  });