Robolectric未找到测试

Question

@RunWith(RobolectricTestRunner.class)
public class AuthenticationActivityTest {

@Test
public void checkAccountType() throws Exception{
    String accType = new AuthenticationActivity().getResources().getString(R.string.account_type);
    assertThat(accType,equalTo("com.example.myApp"));
}
}

apply plugin: 'com.android.application'
apply plugin: 'org.robolectric' //Robolectric

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.example.myApp"
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            debuggable true
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'LICENSE.txt'
    }
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    androidTestCompile 'junit:junit:4.12' //Robolectric
    androidTestCompile 'org.robolectric:robolectric:2.4' //Robolectric
}

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

com.example.myApp.AuthenticationActivityTest > testAccountType[small(AVD) - 5.0.2] FAILED 
java.lang.NullPointerException: parentLoader == null && !nullAllowed
at java.lang.ClassLoader.<init>(ClassLoader.java:210)
:app:connectedAndroidTest FAILED

Answer 1

尝试添加；

sourceSets {
    androidTest {
        setRoot('src/test')
    }
}

到你的build.gradle'android'闭包，指向你的tests目录。

你是否直接从Android Studio运行测试？我以前有过这样的问题，尝试从终端使用gradle test命令运行它们。