在我的测试中
@LargeTest
@RunWith(AndroidJUnit4.class)
public class SimpleActicityTest {
@Rule
public ActivityTestRule<MainActivity> activityActivityTestRule =
new ActivityTestRule<>(MainActivity.class);
@Test
public void testActivity() throws Exception {
Activity a = activityActivityTestRule.getActivity();
Screenshot.snapActivity(activity).setName("s1").record();
}
我有
ava.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.app.Instrumentation.getContext()' on a null object reference
at com.facebook.testing.screenshot.internal.ScreenshotImpl.getInstance(ScreenshotImpl.java:338)
at com.facebook.testing.screenshot.Screenshot.snapActivity(Screenshot.java:45)
at com.mobium.reference.activity.Util.takeScreenshot(Util.java:32)
at com.mobium.reference.activity.SimpleActicityTest.lambda$testLeftMenuTest$1(SimpleActicityTest.java:52)
at com.mobium.reference.activity.SimpleActicityTest.access$lambda$0(SimpleActicityTest.java)
at com.mobium.reference.activity.SimpleActicityTest$$Lambda$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5549)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:964)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:759)
faceebook的lib getInstance()的来源:
public static ScreenshotImpl getInstance() {
if(sInstance != null) {
return sInstance;
} else {
Class var0 = ScreenshotImpl.class;
synchronized(ScreenshotImpl.class) {
if(sInstance != null) {
return sInstance;
} else {
Instrumentation instrumentation = Registry.getRegistry().instrumentation;
Bundle arguments = Registry.getRegistry().arguments;
HostFileSender hostFileSender = new HostFileSender(instrumentation, arguments);
sInstance = create(instrumentation.getContext(), arguments, hostFileSender);
return sInstance;
}
}
}
}
它创建了Registry并使用公共字段检测,但在Registry构造函数中没有检测初始化.它是如何工作的?
解决方法:
如果您想使用AndroidJUnit4,您必须创建一个自定义测试运行器,其中初始化屏幕截图.
如下所述:
https://facebook.github.io/screenshot-tests-for-android/#custom-test-runner
在测试目录中创建一个自定义测试运行器(androidTest / java / …):
public class MyTestRunner extends AndroidJUnitRunner {
@Override
public void onCreate(Bundle args) {
ScreenshotRunner.onCreate(this, args);
super.onCreate(args);
}
@Override
public void finish(int resultCode, Bundle results) {
ScreenshotRunner.onDestroy();
super.finish(resultCode, results);
}
}
在build.gradle中,将testInstrumentationRunner设置为自定义运行器:
defaultConfig {
// ...
testInstrumentationRunner "my.package.MyTestRunner"
}
标签:android,gradle,screenshot 来源: https://codeday.me/bug/20190527/1166903.html
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