Running unit tests before each build in Gradle

Question

How can I configure a build.gradle in an Android project to run all my unit tests before each debug or release build? I know that I can set tasks dependencies with dependsOn, but how can I specify it for the unit test task? I'd like to do this for each (Android and plain Java) module of my project, is it possible?

Answer 1

Go to Run/Debug Configurations, and select your application configuration. At the bottom of the right panel, under Before launch:, click the + button, and select Run another configuration. There, choose the configuration for running your tests.

In before launch set your test case command to run them.

else for pre gradle task refer here

Answer 2

Do you have a special task to run only unit tests? Or you are free to run it as simple test (or more generally testDebug and testRelease)? Let's say, you want to run testDebug or testRelease every time you call assembleDebug or assembleRelease task. Then you can, as you've noted, use dependsOn task property. For example this way:

assembleDebug.dependsOn testDebug
assembleRelease.dependsOn testRelease

This configuration must be added to every build.gradle script (in every module of the project), where you need it. If you have a number of test tasksm you can set task dependencies this way:

tasks.assembleRelease.dependsOn {
    project.tasks.findAll { task ->
        task.name.startsWith('testRelease')
    }
}

Sure, you can try to set this dependencies in the root the root build.gradle script, by using allprojects or subprojects (you can read about it here), but you have to apply android plugin in the root script too, otherwise tasks won't be found.