如何测试片段，Robolectric？ [英] How can I test fragments with Robolectric?

问题描述

我知道有一个 Robolectric.shadowOf（片段）方法和 ShadowFragment 类，认为他们AREN'牛逼上市的文档，但我不能使它工作。

I know there is a Robolectric.shadowOf(Fragment) method and a ShadowFragment class, thought they aren't listed on the docs, but I can't make it work.

myFragment = new MyFragment();
myFragment.onCreateView(LayoutInflater.from(activity), (ViewGroup) activity.findViewById(R.id.container), null);
myFragment.onAttach(activity);
myFragment.onActivityCreated(null); 

我正与API级13（蜂窝）。

I'm working with API level 13 (Honeycomb).

感谢。

推荐答案

编辑＃3 ：Robolectric 2.4具有的API支持和定期的碎片的。您可以施工时使用的newInstance（）图案或使用构造你的片段的。

Edit #3: Robolectric 2.4 has an API for support and regular fragments. You can either use the newInstance() pattern or use the constructor when constructing your Fragment's.

import org.junit.Test;
import org.junit.runner.RunWith;
import static org.junit.Assert.assertNotNull;
import static org.robolectric.util.FragmentTestUtil.startFragment;

@RunWith(RobolectricGradleTestRunner.class)
public class DisplayFragmentTest
{
    @Test
    public void shouldNotBeNull() throws Exception
    {
        DisplayFragment fragment = new DisplayFragment();
        startFragment( fragment );
        assertNotNull( fragment );
    }
}

编辑＃2 ：有，如果您使用的是支持的片段（是一个新帮手<一href="https://github.com/robolectric/robolectric/blob/master/src/main/java/org/robolectric/util/FragmentTestUtil.java">one支持常规活动/片段应在下一版本）：

Edit #2: There's a new helper if you're using support fragments (one that supports regular activities/fragments should be in the next release):

import static org.robolectric.util.FragmentTestUtil.startFragment;

@Before
public void setUp() throws Exception
{
    fragment = DetailFragment.newInstance( createVeggieDetail() );
    startFragment( fragment );
}

修改：如果您升级到Robolectric 2.0：

Edit: If you upgraded to Robolectric 2.0:

public static void startFragment( Fragment fragment )
{
    FragmentActivity activity = Robolectric.buildActivity( FragmentActivity.class )
                                           .create()
                                           .start()
                                           .resume()
                                           .get();

    FragmentManager fragmentManager = activity.getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.add( fragment, null );
    fragmentTransaction.commit();
}

原来的答复

由于其他评论者建议，你需要使用（而不是打电话给你上面列出的生命周期方法）的片段经理。

As the other commenter suggested, you do need to use the fragment manager (instead of calling the lifecycle methods you listed above).

@RunWith(MyTestRunner.class)
public class MyFragmentTest
{
    @Test
    public void shouldNotBeNull() throws Exception
    {
        MyFragment myFragment = new MyFragment();
        startFragment( myFragment );
        assertNotNull( myFragment );
    }

我创建了一个测试运行，并有一个启动一个片段，我的函数，所以我可以用它无处不在。

I create a test runner and have a function that starts up a fragment for me so I can use it everywhere.

public class MyTestRunner extends RobolectricTestRunner
{
    public MyTestRunner( Class<?> testClass ) throws InitializationError
    {
        super( testClass );
    }

    public static void startFragment( Fragment fragment )
    {
        FragmentManager fragmentManager = new FragmentActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.add( fragment, null );
        fragmentTransaction.commit();
    }
}

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