Robolectric 4.0.1不断在buildActivity上抛出Resources $ NotFoundException

Question

我正在尝试使用robolectric构建非常简单的单元测试，但我无法创建活动。

我尝试了线程上的建议，但没有成功。

Resources$NotFoundException when calling Robolectric.buildActivity()

然而，我使用的是4.0.1版本。我想知道是否需要做一些额外的设置。

这是我的傻瓜：

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'

    testImplementation 'androidx.test.espresso:espresso-core:3.1.0'
    testImplementation 'androidx.test:core:1.0.0'
    testImplementation 'androidx.test.ext:junit:1.0.0'
    testImplementation 'junit:junit:4.12'
    testImplementation 'org.mockito:mockito-core:2.23.0'
    testImplementation 'org.robolectric:robolectric:4.0.1'
    androidTestImplementation 'com.google.truth:truth:0.42'
    testImplementation 'com.google.truth:truth:0.42'
    androidTestImplementation 'com.android.support.test:rules:1.0.2'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
}

和我的测试程序：

@Config(sdk = 28, manifest=Config.NONE)
@RunWith(RobolectricTestRunner.class)
public class MainActivityTest {
    private Activity activity;
    @Before
    public void setup() {

        try {
            // I tried these 3 lines of code and they all throw the exception :(

            //activity = Robolectric.buildActivity(MainActivity.class).create().get();
            //activity = Robolectric.setupActivity(MainActivity.class);
            activity = Robolectric.buildActivity(MainActivity.class).create().start().resume().get();
        }
        catch (Exception e)
        {
            System.out.println("Keeps throwing exception!");
        }
    }
}

这里的输出：

[Robolectric] com.guitarv.robotest.MainActivityTest.validateTextViewContent: sdk=28; resources=legacy
[Robolectric] NOTICE: legacy resources mode is deprecated; see http://robolectric.org/migrating/#migrating-to-40
Keeps throwing exception!
Test:Sun Nov 11 06:21:59 PST 2018

我点击了该链接并将gradle.properties更新为：

org.gradle.jvmargs=-Xmx1536m
# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true
android.enableUnitTestBinaryResources=true

但没有成功。我仍然无法创建活动，遗留模式消息不断显示。

有什么线索我做错了什么？

谢谢。

Answer 1

Robolectric无法找到您应用的资源。

将此添加到您的build.gradle：

android {
    testOptions {
        unitTests.includeAndroidResources = true
    }
}

将此添加到您的gradle.properties（Android Studio 3.3+不需要）：

android.enableUnitTestBinaryResources=true

Answer 2

我在使用Robolectric 4.2时遇到了这个问题。升级到4.2.1修复了问题。