chore(coverage): Add code coverage support

So I can use code coverage checking in the githooks to demonstrate --no-verify

Author: Kent C. Dodds

.gitignore

@@ -1,2 +1,4 @@
 dist
 node_modules
+.nyc_output/
+coverage/

.travis.yml

@@ -15,7 +15,8 @@ before_install:
 before_script:
   - npm prune
 script:
-  - npm t
+  - npm run cover
   - npm run build
 after_success:
   - npm run semantic-release
+  - npm run report-coverage

CONTRIBUTING.md

@@ -40,7 +40,7 @@ that I'll accept it before you spend time working on it.
 5. Run `npm t && npm run build`. If everything works, then you're ready to make changes.
 6. Run `npm run test:watch`. See that it's watching your file system for changes.
 7. Make your changes and try to make the tests pass. If you can't or need help then commit what you have with `--no-verify` and make a PR
-8. If you get things working, add your changed files with `git add` and run `npm run commit` to get an interactive prompt for creating a commit message that follows [our standards](https://github.com/ajoslin/conventional-changelog/blob/master/conventions/angular.md)
+8. If you get things working, add your changed files with `git add` and run `npm run commit` to get an interactive prompt for creating a commit message that follows [our standards](https://github.com/ajoslin/conventional-changelog/blob/master/conventions/angular.md). You'll notice that there are git hooks in place which will run testing, linting, etc. (unless you commit with `--no-verify`).
 9. Push your changes to your fork with `git push`
 10. Create a pull request.
 11. Iterate on the solution.

README.md

@@ -1,6 +1,7 @@
 # stack-overflow-copy-paste
 
 [![travis build](https://img.shields.io/travis/eggheadio-github/stack-overflow-copy-paste.svg?style=flat-square)](https://travis-ci.org/eggheadio-github/stack-overflow-copy-paste)
+[![codecov coverage](https://img.shields.io/codecov/c/github/eggheadio-github/stack-overflow-copy-paste.svg?style=flat-square)](https://codecov.io/github/eggheadio-github/stack-overflow-copy-paste)
 [![version](https://img.shields.io/npm/v/stack-overflow-copy-paste.svg?style=flat-square)](http://npm.im/stack-overflow-copy-paste)
 [![downloads](https://img.shields.io/npm/dm/stack-overflow-copy-paste.svg?style=flat-square)](http://npm-stat.com/charts.html?package=stack-overflow-copy-paste&from=2015-08-01)
 [![MIT License](https://img.shields.io/npm/l/stack-overflow-copy-paste.svg?style=flat-square)](http://opensource.org/licenses/MIT)

package.json

@@ -7,8 +7,12 @@
     "commit": "git-cz",
     "prebuild": "npm run lint && npm run clean",
     "clean": "rimraf dist && mkdir dist",
+    "cover": "nyc --reporter lcov --reporter text npm t",
+    "check-coverage": "nyc check-coverage --statements 100 --branches 100 --functions 100 --lines 100",
+    "report-coverage": "cat ./coverage/lcov.info | codecov",
     "build": "babel src/ -d dist/",
     "test": "ava --require babel-register",
+    "test:watch": "nodemon --exec npm t",
     "lint": "eslint src/",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
@@ -38,14 +42,15 @@
     "eslint-config-kentcdodds": "5.0.1",
     "ghooks": "1.0.3",
     "nodemon": "1.8.1",
+    "nyc": "5.3.0",
     "rimraf": "2.5.0",
-    "validate-commit-msg": "1.1.1",
-    "semantic-release": "4.3.5"
+    "semantic-release": "4.3.5",
+    "validate-commit-msg": "1.1.1"
   },
   "config": {
     "ghooks": {
       "commit-msg": "validate-commit-msg",
-      "pre-commit": "npm t && npm run build"
+      "pre-commit": "npm run cover && npm run check-coverage && npm run build"
     },
     "commitizen": {
       "path": "node_modules/cz-conventional-changelog"

src/flatten.js

@@ -5,3 +5,4 @@ function flatten(arr) {
     return flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten)
   }, [])
 }
+