Add expect.it shorthands

Author: papandreou

lib/createTopLevelExpect.js

@@ -707,6 +707,17 @@ expectPrototype.addAssertion = function (
     // Make sure that all flags are defined.
     handler.flags = extend({}, defaultValueByFlag, handler.flags);
 
+    this[
+      handler.testDescriptionString.replace(/ [a-z]/g, ($0) =>
+        $0.charAt(1).toUpperCase()
+      )
+    ] = (...args) =>
+      createExpectIt(
+        this._topLevelExpect,
+        [[testDescriptionString, ...args]],
+        this.flags
+      );
+
     const assertionHandlers = assertions[handler.testDescriptionString];
     handler.specificity = calculateAssertionSpecificity(handler);
     if (!assertionHandlers) {
@@ -1579,6 +1590,11 @@ expectPrototype.clone = function () {
   const clonedAssertions = {};
   Object.keys(this.assertions).forEach(function (assertion) {
     clonedAssertions[assertion] = [].concat(this.assertions[assertion]);
+    // FIXME: We would get this for free if the assertions were recreated in the clone with addAssertion:
+    this[assertion.replace(/ [a-z]/g, ($0) => $0.charAt(1).toUpperCase())] = (
+      ...args
+    ) =>
+      createExpectIt(this._topLevelExpect, [[assertion, ...args]], this.flags);
   }, this);
   const expect = createTopLevelExpect({
     assertions: clonedAssertions,