英文:
No registered instrumentation, errors when running unit tests
问题
遇到了一个奇怪的错误在我的测试单元中。
public class GameActivityUnitTest {
private static ActivityScenario<GameActivity> scenario;
@BeforeClass
public static void createLogHistory() {
scenario = ActivityScenario.launch(GameActivity.class);
// WHEN
scenario.moveToState(Lifecycle.State.CREATED);
}
@Test
public void testPointsChange() {
scenario.onActivity(activity -> {
activity.increaseCoin();
activity.increaseCoin();
activity.decreaseCoin();
assertTrue(activity.coins == 1);;
});
}
@Test
public void testGamePauseStatus() {
scenario.onActivity(activity -> {
activity.view.getTimerController().pause();
assertTrue(activity.view.getPauseStatus());
activity.view.getTimerController().resume();
assertTrue(activity.coins == 1);;
assertFalse(activity.view.getPauseStatus());
});
}
}
我认为标记为 @BeforeClass 的函数被所有后续的测试单元共享。
我显示的内容给出了 "No instrumentation registered" 错误。
然而，如果我删除 @BeforeClass 方法，但在每个测试单元中重复代码。
错误消失了。
为什么会发生这种情况？
我不希望每次都重复代码，我应该怎么做？
谢谢！
英文:
I encountered a weird error in my test unit.
public class GameActivityUnitTest {
private static ActivityScenario<GameActivity> scenario;
@BeforeClass
public static void createLogHistory() {
scenario = ActivityScenario.launch(GameActivity.class);
// WHEN
scenario.moveToState(Lifecycle.State.CREATED);
}
@Test
public void testPointsChange() {
scenario.onActivity(activity -> {
activity.increaseCoin();
activity.increaseCoin();
activity.decreaseCoin();
assertTrue(activity.coins == 1);;
});
}
@Test
public void testGamePauseStatus() {
scenario.onActivity(activity -> {
activity.view.getTimerController().pause();
assertTrue(activity.view.getPauseStatus());
activity.view.getTimerController().resume();
assertTrue(activity.coins == 1);;
assertFalse(activity.view.getPauseStatus());
});
}
}
I think function tagged as @BeforeClass is shared by all the following test units.
What I display gives my the "No instrumentation registered" error.
However, if I delete @BeforeClass method but repeat the code in each test units.
The error disappears.
Why this happens?
And I don't want the code to be repeated every time, what should I do?
Thank you!
答案1
得分: 0
如果您想在每次运行测试之前执行一些代码，应该使用@Before注解（而不是@BeforeClass）。
这意味着您可以在createLogHistory()中轻松启动被测试的活动（现在不应该是静态的）。
英文:
If you want to execute some code before every test is run, you should use the @Before annotation (not @BeforeClass).
That means that you can easily launch the activity under test in your createLogHistory() (which should now not be static).
专注分享java语言的经验与见解，让所有开发者获益！
评论