Ответ 1
Вот как я это делаю в данный момент:
public class MainScreenTest extends BaseStatelessBlackBoxEspressoTest<LaunchActivity> {
public MainScreenTest() {
super(LaunchActivity.class);
}
public void testMainScreen() {
// Unfortunately this must be explicitly called in each test :-(
setUpFailureHandler();
onView(withId(R.id.main_circle)).
check(matches(isDisplayed()));
}
}
Мой базовый тестовый класс Espresso настраивает пользовательский FailureHandler (мне нравится использовать базовый класс для хранения большого количества других распространенных кодов):
public abstract class BaseStatelessBlackBoxEspressoTest<T extends Activity> extends BaseBlackBoxTest<T> {
public BaseStatelessBlackBoxEspressoTest(Class clazz) {
super(clazz);
}
@Before
public void setUp() throws Exception {
super.setUp();
getActivity();
}
public void setUpFailureHandler() {
// Get the test class and method. These have to match those of the test
// being run, otherwise the screenshot will not be displayed in the Spoon
// HTML output. We cannot call this code directly in setUp, because at
// that point the current test method is not yet in the stack.
StackTraceElement[] trace = Thread.currentThread().getStackTrace();
String testClass = trace[3].getClassName();
String testMethod = trace[3].getMethodName();
Espresso.setFailureHandler(new CustomFailureHandler(
getInstrumentation().getTargetContext(),
testClass,
testMethod));
}
private static class CustomFailureHandler implements FailureHandler {
private final FailureHandler mDelegate;
private String mClassName;
private String mMethodName;
public CustomFailureHandler(Context targetContext, String className, String methodName) {
mDelegate = new DefaultFailureHandler(targetContext);
mClassName = className;
mMethodName = methodName;
}
@Override
public void handle(Throwable error, Matcher<View> viewMatcher) {
try {
mDelegate.handle(error, viewMatcher);
} catch (Exception e) {
SpoonScreenshotAction.perform("espresso_assertion_failed", mClassName, mMethodName);
throw e;
}
}
}
}
... и вот немного измененный код скриншота из Gist, отправленный Square:
/**
* Source: https://github.com/square/spoon/issues/214#issuecomment-81979248
*/
public final class SpoonScreenshotAction implements ViewAction {
private final String tag;
private final String testClass;
private final String testMethod;
public SpoonScreenshotAction(String tag, String testClass, String testMethod) {
this.tag = tag;
this.testClass = testClass;
this.testMethod = testMethod;
}
@Override
public Matcher<View> getConstraints() {
return Matchers.anything();
}
@Override
public String getDescription() {
return "Taking a screenshot using spoon.";
}
@Override
public void perform(UiController uiController, View view) {
Spoon.screenshot(getActivity(view), tag, testClass, testMethod);
}
private static Activity getActivity(View view) {
Context context = view.getContext();
while (!(context instanceof Activity)) {
if (context instanceof ContextWrapper) {
context = ((ContextWrapper) context).getBaseContext();
} else {
throw new IllegalStateException("Got a context of class "
+ context.getClass()
+ " and I don't know how to get the Activity from it");
}
}
return (Activity) context;
}
public static void perform(String tag, String className, String methodName) {
onView(isRoot()).perform(new SpoonScreenshotAction(tag, className, methodName));
}
}
Мне бы хотелось найти способ избежать вызова setUpFailureHandler()
в каждом тесте - сообщите мне, если у вас есть хорошая идея о том, как этого избежать!