android - 运行 Robolectric 测试时的 Resources$NotFoundException

Question

我刚刚使用新应用设置了 Roboelectric 3.2.2，并且编写了我的第一个简单测试:

@RunWith(RobolectricTestRunner.class)
@Config(manifest="src/main/AndroidManifest.xml",
    packageName="my.pacakge.name.debug")
public class MainActivityTest {

    @Test
    public void clickButton() {
        MainActivity mainActivity = Robolectric.setupActivity(MainActivity.class);
        String text = ((TextView)mainActivity.findViewById(R.id.text_main)).getText().toString();
        assertEquals("Should equal Hello World!", "Hello World!", text);
    }
}

我已按照所有设置和说明进行操作 here和 here但是每次尝试运行测试时我仍然会收到此错误:

android.content.res.Resources$NotFoundException: Unable to find resource ID #0x0 in packages [android, my.package.name.debug]

此异常发生在我调用 setupActivity() 的测试的第一行。

Answer 1

它对我有用: 添加 @Config(manifest = "src/main/AndroidManifest.xml")

@Config(manifest = "src/main/AndroidManifest.xml")
@RunWith(RobolectricTestRunner.class)
public class MainActivityTest {

    @Test
    public void testSomething() throws Exception {
        assertTrue(Robolectric.setupActivity(MainActivityTest .class) != null);
    }
}   

注意 1:如果您仍然遇到同样的错误(在创建新项目时发生)

The Reason is related to different working directory & the answer is here: https://stackoverflow.com/a/31469526/4802664

注2:使用

Android Studio 3.0 (canary 9)
Gradle 4.1
Android Gradle plugin 3.0.0-alpha9
robolectric: 3.4.2

Gradle

buildscript {

    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0-alpha9'
    }
}    

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'


    testImplementation 'junit:junit:4.12'

    // Espresso
    androidTestImplementation 'com.android.support.test:runner:1.0.0'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.0'

    // Robolectric
    testImplementation 'org.hamcrest:hamcrest-library:1.3'
    testImplementation 'org.robolectric:robolectric:3.4.2'
}