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POAngular Controllers: How are these magic methods working in this unit test?
 

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  1. POAngular Controllers: How are these magic methods working in this unit test?
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    <p>Consider the two snippets of code below, taken from <a href="http://docs.angularjs.org/guide/dev_guide.unit-testing" rel="nofollow">the angular docs on unit testing</a>:</p> <blockquote> <p>In angular the controllers are strictly separated from the DOM manipulation logic which results in a much easier testability story as can be seen in this example:</p> </blockquote> <pre><code>function PasswordCtrl($scope) { $scope.password = ''; $scope.grade = function() { var size = $scope.password.length; if (size &gt; 8) { $scope.strength = 'strong'; } else if (size &gt; 3) { $scope.strength = 'medium'; } else { $scope.strength = 'weak'; } }; } </code></pre> <blockquote> <p>and the test is straight forward</p> </blockquote> <pre><code>var pc = new PasswordCtrl(); pc.password('abc'); pc.grade(); expect(pc.strength).toEqual('weak'); </code></pre> <p>I want to know how the 2nd code snippet is working. No mock $scope is passed to it, and yet apparently it works. Also the method calls <code>pc.password('abc');</code> and <code>pc.grade()</code> seem to be aliases for <code>$scope.password('abc')</code> and <code>$scope.grade()</code>, but where do these aliases come from? Is this something built into angular? A sort of equivalent to ruby's method_missing? If so, how does it work under the hood?</p>
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    1. COare you sure that this test works? Could you provide live example in plunker? It feels fishy.
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    2. COIt's from the official angular docs, as I linked to in the OP, so I assume it works. They don't give details about how to set it up, so I haven't tried running it myself.
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    3. CO@pkozlowski.opensource, also, i see you wrote a soon-to-be-released book on angular, so if you have recommendations for other tutorials on unit testing in angular, i'd appreciate them.
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