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+@ngdoc overview
+@name Tutorial: 3 - Filtering Repeaters
+@description
+
+<ul doc:tutorial-nav="3"></ul>
+
+
+We did a lot of work in laying a foundation for the app in the last step, so now we'll do something
+simple; we will add full text search (yes, it will be simple!). We will also write an end-to-end
+test, because a good end-to-end test is a good friend. It stays with your app, keeps an eye on it,
+and quickly detects regressions.
+
+
+<doc:tutorial-instructions step="3"></doc:tutorial-instructions>
+
+
+The app now has a search box. Notice that the phone list on the page changes depending on what a
+user types into the search box.
+
+The most important differences between Steps 2 and 3 are listed below. You can see the full diff on
+{@link https://github.com/angular/angular-phonecat/compare/step-2...step-3
+ GitHub}:
+
+
+## Controller
+
+We made no changes to the controller.
+
+
+## Template
+
+__`app/index.html`:__
+<pre>
+...
+   Fulltext Search: <input ng:model="query"/>
+
+  <ul class="phones">
+    <li ng:repeat="phone in phones.$filter(query)">
+      {{phone.name}}
+      <p>{{phone.snippet}}</p>
+    </li>
+  </ul>
+...
+</pre>
+
+We added a standard HTML `<input>` tag and used angular's {@link api/angular.module.ng.$filter.filter $filter}
+function to process the input for the `ng:repeater`.
+
+This lets a user enter search criteria and immediately see the effects of their search on the phone
+list. This new code demonstrates the following:
+
+* Data-binding. This is one of the core features in Angular. When the page loads, Angular binds the
+name of the input box to a variable of the same name in the data model and keeps the two in sync.
+
+  In this code, the data that a user types into the input box (named __`query`__) is immediately
+available as a filter input in the list repeater (`phone in phones.$filter(`__`query`__`)`). When
+changes to the data model cause the repeater's input to change, the repeater efficiently updates
+the DOM to reflect the current state of the model.
+
+      <img src="img/tutorial/tutorial_03_final.png">
+
+* Use of `$filter`. The {@link api/angular.module.ng.$filter.filter $filter} method uses the `query` value to
+create a new array that contains only those records that match the `query`.
+
+  `ng:repeat` automatically updates the view in response to the changing number of phones returned
+by the `$filter`. The process is completely transparent to the developer.
+
+## Test
+
+In Step 2, we learned how to write and run unit tests. Unit tests are perfect for testing
+controllers and other components of our application written in JavaScript, but they can't easily
+test DOM manipulation or the wiring of our application. For these, an end-to-end test is a much
+better choice.
+
+The search feature was fully implemented via templates and data-binding, so we'll write our first
+end-to-end test, to verify that the feature works.
+
+__`test/e2e/scenarios.js`:__
+<pre>
+describe('PhoneCat App', function() {
+
+  describe('Phone list view', function() {
+
+    beforeEach(function() {
+      browser().navigateTo('../../app/index.html');
+    });
+
+    it('should filter the phone list as user types into the search box', function() {
+      expect(repeater('.phones li').count()).toBe(3);
+
+      input('query').enter('nexus');
+      expect(repeater('.phones li').count()).toBe(1);
+
+      input('query').enter('motorola');
+      expect(repeater('.phones li').count()).toBe(2);
+    });
+  });
+});
+</pre>
+
+Even though the syntax of this test looks very much like our controller unit test written with
+Jasmine, the end-to-end test uses APIs of {@link guide/dev_guide.e2e-testing Angular's end-to-end
+test runner}.
+
+To run the end-to-end test, open one of the following in a new browser tab:
+
+* node.js users: {@link http://localhost:8000/test/e2e/runner.html}
+* users with other http servers:
+`http://localhost:[port-number]/[context-path]/test/e2e/runner.html`
+* casual reader: {@link http://angular.github.com/angular-phonecat/step-3/test/e2e/runner.html}
+
+This test verifies that the search box and the repeater are correctly wired together. Notice how
+easy it is to write end-to-end tests in Angular. Although this example is for a simple test, it
+really is that easy to set up any functional, readable, end-to-end test.
+
+# Experiments
+
+* Display the current value of the `query` model by adding a `{{query}}` binding into the
+`index.html` template, and see how it changes when you type in the input box.
+
+* Let's see how we can get the current value of the `query` model to appear in the HTML page title.
+
+  You might think you could just add the {{query}} to the title tag element as follows:
+
+          <title>Google Phone Gallery: {{query}}</title>
+
+  However, when you reload the page, you won't see the expected result. This is because the "query"
+model lives in the scope defined by the body element:
+
+          <body ng:controller="PhoneListCtrl">
+
+  If you want to bind to the query model from the `<title>` element, you must __move__ the
+`ng:controller` declaration to the HTML element because it is the common parent of both the body
+and title elements:
+
+          <html ng:controller="PhoneListCtrl">
+
+  Be sure to *remove* the `ng:controller` declaration from the body element.
+
+  While using double curlies works fine in within the title element, you might have noticed that
+for a split second they are actually displayed to the user while the page is loading. A better
+solution would be to use the {@link api/angular.directive.ng:bind ng:bind} or {@link
+api/angular.directive.ng:bind-template ng:bind-template} directives, which are invisible to the
+user while the page is loading:
+
+          <title ng:bind-template="Google Phone Gallery: {{query}}">Google Phone Gallery</title>
+
+* Add the following end-to-end test into the `describe` block within `test/e2e/scenarios.js`:
+
+  <pre>
+    it('should display the current filter value within an element with id "status"',
+        function() {
+      expect(element('#status').text()).toMatch(/Current filter: \s*$/);
+
+      input('query').enter('nexus');
+
+      expect(element('#status').text()).toMatch(/Current filter: nexus\s*$/);
+
+      //alternative version of the last assertion that tests just the value of the binding
+      using('#status').expect(binding('query')).toBe('nexus');
+    });
+  </pre>
+
+  Refresh the browser tab with the end-to-end test runner to see the test fail. To make the test
+pass, edit the `index.html` template to add a `div` or `p` element with `id` `"status"` and content
+with the `query` binding.
+
+* Add a `pause()` statement into an end-to-end test and rerun it. You'll see the runner pause; this
+gives you the opportunity to explore the state of your application while it is displayed in the
+browser. The app is live! You can change the search query to prove it. Notice how useful this is
+for troubleshooting end-to-end tests.
+
+
+# Summary
+
+We have now added full text search and included a test to verify that search works! Now let's go on
+to {@link step_04 step 4} to learn how to add sorting capability to the phone app.
+
+
+<ul doc:tutorial-nav="3"></ul>
+