android – 构建本地单元测试(没有注册仪器！必须在注册仪器下运行)

参见英文答案 > AndroidX : No instrumentation registered! Must run under a registering instrumentation                                    2个
看一下官方的 documentation.Include framework dependencies一节给出了一个如何设置本地单元测试以使用android sdk环境的例子.但是,如果您按照示例执行所有操作,则测试无法启动.我得到了一个错误

所有尝试都是在一个新项目上进行的. Android studio 3.3,gradle-4.10.1,build：gradle：3.3.0,Kotlin,并包含Androidx工件.

然后使用指定的配置将以下行添加到项目中：

的build.gradle

android {
    // ...
    testOptions {
        unitTests.includeAndroidresources = true
    }
}

dependencies {
    // ...
    // Already exist
    testImplementation 'junit:junit:4.12'
    // Added this line
    testImplementation 'androidx.test:core:1.0.0'
}

而测试体本身：

package com.example.myapplication

import android.content.Context
import androidx.test.core.app.ApplicationProvider
import org.junit.Test

class ExampleUnitTest {

    val context = ApplicationProvider.getApplicationContext<Context>()

    @Test
    fun readStringFromContext_LocalizedString() {
        System.out.println(context.applicationInfo.packageName)
    }
}

我究竟做错了什么？

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testinstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),'proguard-rules.pro'
        }
    }
    testOptions {
        unitTests.includeAndroidresources = true
    }
}

dependencies {
    implementation fileTree(dir: 'libs',include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.0-beta01'
    implementation 'androidx.core:core-ktx:1.1.0-alpha03'
    implementation 'androidx.consTraintlayout:consTraintlayout:1.1.2'
    testImplementation 'junit:junit:4.12'
    testImplementation 'androidx.test:core:1.0.0'
    androidTestImplementation 'androidx.test:runner:1.1.0-alpha4'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
}

@RunWith(RobolectricTestRunner.class)
class ExampleUnitTest {