feat(regexps): add toBeRegExp matcher

closes #25, #64

package.json

@@ -19,7 +19,8 @@
     "Marcin Wosinek (https://github.com/marcin-wosinek)",
     "Mathieu Robin (https://github.com/MathRobin)",
     "Sam L'ecuyer (https://github.com/samlecuyer)",
-    "Vilmos Ioo (https://github.com/vilmosioo)"
+    "Vilmos Ioo (https://github.com/vilmosioo)",
+    "Jacob Ward (https://github.com/jacobwarduk"
   ],
   "dependencies": {
     "jasmine-matchers-loader": "0.1.0"

src/api.js

@@ -112,6 +112,7 @@ module.exports = {
     toBeNumber: require('./toBeNumber'),
     toBeObject: require('./toBeObject'),
     toBeOddNumber: require('./toBeOddNumber'),
+    toBeRegExp: require('./toBeRegExp'),
     toBeSameLengthAs: require('./toBeSameLengthAs'),
     toBeShorterThan: require('./toBeShorterThan'),
     toBeString: require('./toBeString'),

src/toBeRegExp.js

@@ -0,0 +1,4 @@
+// public
+module.exports = function toBeRegExp(actual) {
+  return actual instanceof RegExp;
+};

test/index.js

@@ -53,6 +53,7 @@ module.exports = {
   toBeNumber: require('./toBeNumber.spec'),
   toBeObject: require('./toBeObject.spec'),
   toBeOddNumber: require('./toBeOddNumber.spec'),
+  toBeRegExp: require('./toBeRegExp.spec'),
   toBeSameLengthAs: require('./toBeSameLengthAs.spec'),
   toBeShorterThan: require('./toBeShorterThan.spec'),
   toBeString: require('./toBeString.spec'),

test/toBeRegExp.spec.js

@@ -0,0 +1,18 @@
+// spec
+describe('toBeRegExp', function () {
+  describe('when invoked', function () {
+    describe('when value is an instance of RegExp', function () {
+      it('should confirm', function () {
+        expect(new RegExp()).toBeRegExp();
+        expect(/abc/).toBeRegExp();
+      });
+    });
+    describe('when value is not an instance of RegExp', function () {
+      it('should deny', function () {
+        expect(null).not.toBeRegExp();
+        expect(function () {}).not.toBeRegExp();
+        expect('abc').not.toBeRegExp();
+      });
+    });
+  });
+});