编辑 #4 和 #5: In 机器人电动 3.* https://github.com/robolectric/robolectric/wiki/2.4-to-3.0-Upgrade-Guide,他们分割了片段启动函数。
对于支持片段,您需要添加依赖性 https://bintray.com/bintray/jcenter/org.robolectric%3Ashadows-supportv4/view给你的build.gradle
:
testCompile "org.robolectric:shadows-supportv4:3.8"
Import: org.robolectric.shadows.support.v4.SupportFragmentTestUtil.startFragment; http://robolectric.org/javadoc/3.0/org/robolectric/shadows/support/v4/SupportFragmentTestUtil.html
对于平台片段,您不需要这种依赖关系。进口:import static org.robolectric.util.FragmentTestUtil.startFragment;
http://robolectric.org/javadoc/3.0/org/robolectric/util/FragmentTestUtil
他们都使用相同的名字startFragment()
.
import static org.robolectric.shadows.support.v4.SupportFragmentTestUtil.startFragment;
@RunWith(RobolectricTestRunner.class)
@Config(constants = BuildConfig.class)
public class YourFragmentTest
{
@Test
public void shouldNotBeNull() throws Exception
{
YourFragment fragment = YourFragment.newInstance();
startFragment( fragment );
assertNotNull( fragment );
}
}
Edit #3:Robolectric 2.4 有一个用于支持和常规片段的 API http://robolectric.org/javadoc/2.4/org/robolectric/util/FragmentTestUtil.html。您可以使用newInstance()
模式或在构造你的时使用构造函数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 YourFragmentTest
{
@Test
public void shouldNotBeNull() throws Exception
{
YourFragment fragment = new YourFragment();
startFragment( fragment );
assertNotNull( fragment );
}
}
Edit #2:如果您使用支持片段,则会有一个新的助手(支持常规活动/片段的应该在下一版本中 https://github.com/robolectric/robolectric/blob/master/src/main/java/org/robolectric/util/FragmentTestUtil.java):
import static org.robolectric.util.FragmentTestUtil.startFragment;
@Before
public void setUp() throws Exception
{
fragment = YourFragment.newInstance();
startFragment( fragment );
}
Edit:如果您升级到 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();
}
原答案
正如其他评论者所建议的,您确实需要使用片段管理器(而不是调用上面列出的生命周期方法)。
@RunWith(MyTestRunner.class)
public class YourFragmentTest
{
@Test
public void shouldNotBeNull() throws Exception
{
YourFragment yourFragment = new YourFragment();
startFragment( yourFragment );
assertNotNull( yourFragment );
}
我创建了一个测试运行程序,并有一个为我启动片段的函数,这样我就可以在任何地方使用它。
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();
}
}