Android检测测试和Library项目

Question

I have one library project and some main projects, that depends on that library project.

I want to write tests for main projects, but the tests common functions should be placed in the library project to reduce code duplication.

I added the following lines in the library's build.gradle :

dependencies {
    compile Dependencies.appCompat
    compile Dependencies.recyclerView
    compile Dependencies.cardView
    compile Dependencies.playAds
    compile Dependencies.googleAnalytics

    compile('com.crashlytics.sdk.android:crashlytics:2.5.2@aar') {
        transitive = true
    }

    // Unit testing dependencies
    androidTestCompile 'junit:junit:4.12'
    // Set this dependency if you want to use the Hamcrest matcher library
    androidTestCompile 'org.hamcrest:hamcrest-library:1.3'
    androidTestCompile 'com.android.support.test:runner:+'
    androidTestCompile 'com.android.support.test:rules:+'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
    androidTestCompile 'org.mockito:mockito-core:1.+'
    androidTestCompile "com.google.dexmaker:dexmaker:1.2"
    androidTestCompile "com.google.dexmaker:dexmaker-mockito:1.2"
    androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.1'
}

in the main build.gradle there is:

dependencies {
    compile project(':library')
}

But in the tests for main project I get the following error: error: package android.support.test.espresso does not exist for the following line

import android.support.test.espresso.UiController;

But espresso is imported in library project. This looks like, that library project is not compiled as android test.

Can this problem be fixed?

Answer 1

You should try creating a separate library for the common testing code. Otherwise, you will have testing code in the app apk.

Create a new testing library (ie "test-library"), put the common code in it. Then create the following in "build.gradle" in the app directory.

dependencies {
    compile project(':library')
    androidTestCompile(':test-library')
}