chore(log): generic test log service with custom toEquals matcher

- any test that needs a logger can just inject provideLog
- logger has susict api that makes tests more readable
- custom toEquals matcher allows for pretty expectations

Author: IgorMinar

test/matchers.js

@@ -36,6 +36,15 @@ beforeEach(function() {
     toBeDirty: cssMatcher('ng-dirty', 'ng-pristine'),
     toBePristine: cssMatcher('ng-pristine', 'ng-dirty'),
 
+    toEqual: function(expected) {
+      if (this.actual && this.actual.$$log) {
+        this.actual = (typeof expected === 'string')
+            ? this.actual.toString()
+            : this.actual.toArray();
+      }
+      return jasmine.Matchers.prototype.toEqual.call(this, expected);
+    },
+
     toEqualData: function(expected) {
       return angular.equals(this.actual, expected);
     },

test/testabilityPatch.js

@@ -185,3 +185,35 @@ function assertVisible(node) {
   }
 }
 
+function provideLog($provide) {
+  $provide.factory('log', function() {
+      var messages = [];
+
+      function log(msg) {
+        messages.push(msg);
+        return msg;
+      }
+
+      log.toString = function() {
+        return messages.join('; ');
+      }
+
+      log.toArray = function() {
+        return messages;
+      }
+
+      log.reset = function() {
+        messages = [];
+      }
+
+      log.fn = function(msg) {
+        return function() {
+          log(msg);
+        }
+      }
+
+      log.$$log = true;
+
+      return log;
+    });
+}