如何从终端运行检测 @SmallTests？

Question

我无法从终端运行我的@SmallTests。我已经创建了我的设置示例，希望您指出我做错了什么。

我正在使用自己的默认 Runner class，它看起来像这样：

public class MyAppTestRunner extends AndroidJUnitRunner {

    @Override
    public Application newApplication(ClassLoader cl, String className, Context context) 
            throws InstantiationException, IllegalAccessException, ClassNotFoundException {
        return super.newApplication(cl, MyAppTestApplication.class.getName(), context);
    }
}

我已经在我的 gradle:

中设置了这个运行ner

android {
    defaultConfig {
        testInstrumentationRunner "com.MyApp.instrumentation.config.MyAppTestRunner"
    }
    testBuildType 'integrationTest'
}

我也在使用这些依赖项：

androidTestCompile com.android.support.test:runner:0.5
androidTestCompile com.android.support.test:rules:0.5

然后我创建了一个简单的 class，其中包含一个用 @SmallTest 注释的测试用例：

import android.content.Intent;
import android.support.test.filters.SmallTest;
import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;

import com.MyApp.a.ui.activity.WelcomeActivity;

import org.junit.Before;
import org.junit.Rule;
import org.junit.runner.RunWith;


@RunWith(AndroidJUnit4.class)
public class ExampleTestPackage {

    @Rule
    public ActivityTestRule<WelcomeActivity> activityRule = new ActivityTestRule<>(
        WelcomeActivity.class, true, false
    );

    @Before
    public void before() {
        activityRule.launchActivity(new Intent());
    }

    @SmallTest
    public void exampleTest() {
        // some test code
    }
}

这就是我的设置。根据我正在使用的 documentation of AndroidJUnitRunner，对于带有小注释的运行我的测试，我应该这样做：

Running a specific test size i.e. annotated with SmallTest or MediumTest or LargeTest: adb shell am instrument -w -e size [small|medium|large] com.android.foo/android.support.test.runner.AndroidJUnitRunner

所以我在终端中做的是：

adb shell am instrument -w -e size small com.MyApp.debug1.test/com.MyApp.instrumentation.config.MyAppTestRunner

但是没有找到我的@SmallTest，输出是：

Time: 0.001

OK (0 tests)

此外，如果我从 Android Studio 开始我的测试 class，那么我会看到这个错误：

java.lang.Exception: No runnable methods
at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:191)
at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:128)
at org.junit.runners.ParentRunner.validate(ParentRunner.java:416)
at org.junit.runners.ParentRunner.<init>(ParentRunner.java:84)
at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)
at android.support.test.internal.runner.junit4.AndroidJUnit4ClassRunner.<init>(AndroidJUnit4ClassRunner.java:37)
at android.support.test.runner.AndroidJUnit4.<init>(AndroidJUnit4.java:36)
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.support.test.internal.runner.junit4.AndroidAnnotatedBuilder.buildAndroidRunner(AndroidAnnotatedBuilder.java:83)
at android.support.test.internal.runner.junit4.AndroidAnnotatedBuilder.runnerForClass(AndroidAnnotatedBuilder.java:62)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
at org.junit.runner.Computer.getRunner(Computer.java:40)
at org.junit.runner.Computer.runnerForClass(Computer.java:31)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:101)
at org.junit.runners.model.RunnerBuilder.runners(RunnerBuilder.java:87)
at org.junit.runners.Suite.<init>(Suite.java:81)
at org.junit.runner.Computer.getSuite(Computer.java:28)
at android.support.test.internal.runner.TestRequestBuilder.classes(TestRequestBuilder.java:789)
at android.support.test.internal.runner.TestRequestBuilder.build(TestRequestBuilder.java:753)
at android.support.test.runner.AndroidJUnitRunner.buildRequest(AndroidJUnitRunner.java:354)
at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:260)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1879)

如果我将 @SmallTest 更改为 @Test（导入 org.junit.Test;）当然可以解决这个问题

我是不是用错了class？

Answer 1

来自 android.support.test.filters 的注释 @SmallTest、@MediumTest 等不会替换 @Test 注释。需要 @Test 注释来向 JUnit 发出相应方法是测试用例 (http://junit.org/junit4/javadoc/latest/org/junit/Test.html) 的信号。

在你的情况下，这会起作用：

@SmallTest
@Test
public void exampleTest() {
    // some test code
}

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