angular/angular.js

@ngdoc tutorial
@name 10 - More Templating
@step 10
@description

<ul doc-tutorial-nav="10"></ul>


In this step, we will implement the phone details view, which is displayed when a user clicks on a
phone in the phone list.

* When you click on a phone on the list, the phone details page with phone-specific information is
  displayed.

To implement the phone details view we are going to use {@link ng.$http $http} to fetch our data,
and then flesh out the `phoneDetail` component's template.


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## Data

In addition to `phones.json`, the `app/phones/` directory also contains one JSON file for each
phone:

<br />
**`app/phones/nexus-s.json`:** (sample snippet)

```json
{
  "additionalFeatures": "Contour Display, Near Field Communications (NFC), ...",
  "android": {
    "os": "Android 2.3",
    "ui": "Android"
  },
  ...
  "images": [
    "img/phones/nexus-s.0.jpg",
    "img/phones/nexus-s.1.jpg",
    "img/phones/nexus-s.2.jpg",
    "img/phones/nexus-s.3.jpg"
  ],
  "storage": {
    "flash": "16384MB",
    "ram": "512MB"
  }
}
```

Each of these files describes various properties of the phone using the same data structure. We will
show this data in the phone details view.


## Component Controller

We will expand the `phoneDetail` component's controller by using the `$http` service to fetch the
appropriate JSON files. This works the same way as the `phoneList` component's controller.

<br />
**`app/phone-detail/phone-detail.component.js`:**

```js
  angular.
    module('phoneDetail').
    component('phoneDetail', {
      templateUrl: 'phone-detail/phone-detail.template.html',
      controller: ['$http', '$routeParams',
        function PhoneDetailController($http, $routeParams) {
          var self = this;

          $http.get('phones/' + $routeParams.phoneId + '.json').then(function(response) {
            self.phone = response.data;
          });
        }
      ]
    });
```

To construct the URL for the HTTP request, we use `$routeParams.phoneId`, which is extracted from
the current route by the `$route` service.


## Component Template

The inline, TBD placeholder template has been replaced with a full blown external template,
including lists and bindings that comprise the phone details. Note how we use the AngularJS
`{{expression}}` markup and `ngRepeat` to project phone data from our model into the view.

<br />
**`app/phone-detail/phone-detail.template.html`:**

```html
<img ng-src="{{$ctrl.phone.images[0]}}" class="phone" />

<h1>{{$ctrl.phone.name}}</h1>

<p>{{$ctrl.phone.description}}</p>

<ul class="phone-thumbs">
  <li ng-repeat="img in $ctrl.phone.images">
    <img ng-src="{{img}}" />
  </li>
</ul>

<ul class="specs">
  <li>
    <span>Availability and Networks</span>
    <dl>
      <dt>Availability</dt>
      <dd ng-repeat="availability in $ctrl.phone.availability">{{availability}}</dd>
    </dl>
  </li>
  ...
  <li>
    <span>Additional Features</span>
    <dd>{{$ctrl.phone.additionalFeatures}}</dd>
  </li>
</ul>
```

<img class="diagram" src="img/tutorial/tutorial_10.png">


## Testing

We wrote a new unit test that is similar to the one we wrote for the `phoneList` component's
controller in {@link step_07#testing step 7}.

<br />
**`app/phone-detail/phone-detail.component.spec.js`:**

```js
describe('phoneDetail', function() {

  // Load the module that contains the `phoneDetail` component before each test
  beforeEach(module('phoneDetail'));

  // Test the controller
  describe('PhoneDetailController', function() {
    var $httpBackend, ctrl;

    beforeEach(inject(function($componentController, _$httpBackend_, $routeParams) {
      $httpBackend = _$httpBackend_;
      $httpBackend.expectGET('phones/xyz.json').respond({name: 'phone xyz'});

      $routeParams.phoneId = 'xyz';

      ctrl = $componentController('phoneDetail');
    }));

    it('should fetch the phone details', function() {
      expect(ctrl.phone).toBeUndefined();

      $httpBackend.flush();
      expect(ctrl.phone).toEqual({name: 'phone xyz'});
    });

  });

});
```

You should now see the following output in the Karma tab:

```
Chrome 49.0: Executed 3 of 3 SUCCESS (0.159 secs / 0.136 secs)
```

We also added a new E2E test that navigates to the 'Nexus S' details page and verifies that the
heading on the page is "Nexus S".

<br />
**`e2e-tests/scenarios.js`**

```js
  ...

  describe('View: Phone detail', function() {

    beforeEach(function() {
      browser.get('index.html#!/phones/nexus-s');
    });

    it('should display the `nexus-s` page', function() {
      expect(element(by.binding('$ctrl.phone.name')).getText()).toBe('Nexus S');
    });

  });

  ...
```

You can run the tests with `npm run protractor`.


## Experiments

<div></div>

* Using [Protractor's API][protractor-docs], write a test that verifies that we display 4 thumbnail
  images on the 'Nexus S' details page.


## Summary

Now that the phone details view is in place, proceed to {@link step_11 step 11} to learn how to
write your own custom display filter.


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[protractor-docs]: https://angular.github.io/protractor/#/api