Android测试配置的文件（Robolectric+jacoco）

1、使用Robolectric
（1）在app\build.gradle里面配置

testImplementation "org.robolectric:robolectric:3.8"
testImplementation 'org.robolectric:shadows-support-v4:3.4-rc2'
testImplementation 'org.robolectric:shadows-multidex:3.0'

（2）在"...\xxxProject\build.gradle"中添加

repositories{
...        
maven { url 'https://maven.google.com' } // Robolectric下载所需
}

2、使用数据库ObjectBox
（1）在app\build.gradle里面配置

apply plugin: 'io.objectbox'

implementation "io.objectbox:objectbox-android:${OBJECTBOX_VERSION}"
implementation "io.objectbox:objectbox-linux:${OBJECTBOX_VERSION}"
implementation "io.objectbox:objectbox-macos:$OBJECTBOX_VERSION"
implementation "io.objectbox:objectbox-windows:${OBJECTBOX_VERSION}"
annotationProcessor "io.objectbox:objectbox-processor:${OBJECTBOX_VERSION}"

前面四种根据运行环境去选择，依次是Android、linux系统、Macos系统和windows系统。比如我现在是要用Robolectric进行测试，运行环境是Windows，那么就只要配置

implementation "io.objectbox:objectbox-windows:${OBJECTBOX_VERSION}"
annotationProcessor "io.objectbox:objectbox-processor:${OBJECTBOX_VERSION}"

（2）在"...\xxxProject\build.gradle"中添加

dependencies {
...
classpath "io.objectbox:objectbox-gradle-plugin:${OBJECTBOX_VERSION}"
}

repositories{
...        
maven { url "http://objectbox.net/beta-repo/" }
}

3、如果还需要使用到junit、Mocktio、PowerMocktio就需要增加下面的配置

// junit
testImplementation 'junit:junit:4.12'
// Mockito
testImplementation 'org.mockito:mockito-core:1.9.5'
// PowerMock
testCompile "org.powermock:powermock-module-junit4:1.7.3"
testCompile "org.powermock:powermock-module-junit4-rule:1.7.3"
testCompile "org.powermock:powermock-api-mockito2:1.7.3" //注意这里是mockito2
testCompile "org.powermock:powermock-classloading-xstream:1.7.3"

4、如果需要使用到jacoco覆盖率工具
（1）在app\build.gradle中添加配置：

apply from: "$rootDir/jacoco.gradle"
（2）把jacoco.gradle文件放在"...\xxxProject"下。
（3）在"...\xxxProject\app\libs"路径下添加org.jacoco.agent-0.8.2.jar包。

附上jacoco.gradle文件内容如下：

apply plugin: 'jacoco'

jacoco {
    // https://bintray.com/bintray/jcenter/org.jacoco:org.jacoco.core
    toolVersion = "0.8.2"
}

android {
    testOptions {
        unitTests.all {
            jacoco {
                includeNoLocationClasses = true
            }
        }
    }
}

project.afterEvaluate {

    android.applicationVariants.all { variant ->
        def name = variant.name
        def testTaskName = "test${name.capitalize()}UnitTest"

        tasks.create(name: "${testTaskName}Coverage", type: JacocoReport, dependsOn: "$testTaskName") {
            group = "Reporting"
            description = "Generate Jacoco coverage reports for the ${name.capitalize()} build."

            classDirectories = fileTree(
                    dir: "${project.buildDir}/intermediates/classes/${name}",
                    excludes: ['**/R.class',
                               '**/R$*.class',
                               '**/*$ViewInjector*.*',
                               '**/*$ViewBinder*.*',
                               '**/BuildConfig.*',
                               '**/Manifest*.*']
            )

            sourceDirectories = files(['src/main/java'].plus(android.sourceSets[name].java.srcDirs))
            executionData = files("${project.buildDir}/jacoco/${testTaskName}.exec")

            reports {
                xml.enabled = true
                html.enabled = true
            }
        }
    }
}