Question

我在YT Advanced Android Espresso找到了很棒的乐器测试教程。我从那里拿了代码，对我的需求进行了小调整。

import static android.support.test.InstrumentationRegistry.getInstrumentation;
import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.isAssignableFrom;
import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
import static android.support.test.espresso.matcher.ViewMatchers.withChild;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.matcher.ViewMatchers.withParent;
import static android.support.test.espresso.matcher.ViewMatchers.withText;
import static org.hamcrest.core.AllOf.allOf;

...

@Test
public void checkToolbarTitle() {
    String toolbarTitile = getInstrumentation().getTargetContext().getString(R.string.my_bus_stops);
    onView(allOf(isAssignableFrom(TextView.class), withParent(isAssignableFrom(Toolbar.class)))).check(matches(withText(toolbarTitile)));
}

不幸的是，这对我不起作用。测试失败：

android.support.test.espresso.NoMatchingViewException: No views in hierarchy found matching: (is assignable from class: class android.widget.TextView and has parent matching: is assignable from class: class android.widget.Toolbar)

它出了什么问题？我怎样才能以其他方式测试呢？

Answer 1

这对我有用：

onView(allOf(instanceOf(TextView.class), withParent(withId(R.id.toolbar))))
    .check(matches(withText("toolbarTitile")));

Answer 2

<强>解

方法很好。正如Chiu-Ki Chan在她的教程中写道，你可以指出一个特定的观点＆＃34;。 但您必须确保导入了正确的工具栏：

import  android.support.v7.widget.Toolbar;

而不是：

import android.widget.Toolbar;

Answer 3

如果您使用的是ActionBar，而不是工具栏，请使用：

onView(allOf(instanceOf(TextView.class), 
     withParent(withResourceName("action_bar"))))
        .check(matches(withText("My ActionBar title")));

Answer 4

这是一种替代方法（也是惯用的方法）：

onView(withId(R.id.toolbar)).check(matches(hasDescendant(withText(toolbarTitle))))

Answer 5

我不记得我是自己写的，还是我在某个地方找到了它，但这就是我检查工具栏标题的方式：

public static Matcher<View> withToolbarTitle(CharSequence title) {
    return withToolbarTitle(is(title));
}

public static Matcher<View> withToolbarTitle(final Matcher<CharSequence> textMatcher) {
    return new BoundedMatcher<View, Toolbar>(Toolbar.class) {
        @Override
        public boolean matchesSafely(Toolbar toolbar) {
            return textMatcher.matches(toolbar.getTitle());
        }

        @Override
        public void describeTo(Description description) {
            description.appendText("with toolbar title: ");
            textMatcher.describeTo(description);
        }
    };
}

这适用于所有情况。断言示例：onView(withId(R.id.toolbar)).check(matches(withToolbarTitle("title")));

如何检查android乐器测试中的工具栏标题？

5 个答案: