在ActivityInstrumentationTestCase2中运行浓缩咖啡 [英] Run espresso in ActivityInstrumentationTestCase2

问题描述

我已经写了一些测试用例，但是当我尝试在其中包含espresso时，它会显示java.lang.IllegalStateException: No instrumentation registered! Must run under a registering instrumentation.

I have written some test cases but when I try to include espresso in it, it shows java.lang.IllegalStateException: No instrumentation registered! Must run under a registering instrumentation.

我知道我应该迁移到junit 4，但是我真的不想更改所有测试.

I know I should migrate to junit 4 but I really dont want to change all the tests.

这是测试班:

public class MainActivityTest extends ActivityInstrumentationTestCase2<MainActivity> {

    private Activity activity;

    public MainActivityTest() {
        super(MainActivity.class);
    }

    @Before
    protected void setUp() throws Exception {
        super.setUp();
        injectInstrumentation(InstrumentationRegistry.getInstrumentation());
        activity = getActivity();
    }

    @Test
    public void testEmptyField() {
        onView(withId(R.id.editText)).perform(typeText(""));

        onView(withId(R.id.buttonVerify)).perform(click());

        onView(withText("Please input text")).check(matches(isDisplayed()));
    }

}

以下是我包含的依赖项:

Here are the dependencies I've included:

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile project(':UniversalImageLoader')
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:support-v4:23.1.1'
    androidTestCompile 'com.android.support.test:runner:0.4'
    androidTestCompile 'com.android.support.test:rules:0.4'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
}

推荐答案

即使您使用的是ActivityInstrumentationTestCase2，仍必须使用测试支持库运行器来使用测试支持库中的内容，像这样:

Even if you are using ActivityInstrumentationTestCase2, you still must use the test support lib runner to use the things from the test support lib, like this:

android {
    defaultConfig {
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
}

http://developer.android.com/tools/testing- support-library/index.html

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