The SourceSet 'commonTest' is not recognized by the Android Gradle Plugin. Perhaps you misspelled something?

问题

Seemingly the same root cause as this question, but the answer there will not work for me. I have a custom source set called commonTest that I use for sharing certain test utility code across the test and androidTest source sets. Here is my relevant project config:

sourceSets {
    // This lets us write test utility code that can be used by both unit tests and android tests
    commonTest {
        java
    }
    test {
        java.srcDirs += commonTest.java.srcDirs
    }
    androidTest {
        java.srcDirs += commonTest.java.srcDirs
    }
}

This worked fine with AGP 3.0.1, but breaks on AGP 3.1.0. Are custom source sets no longer supported?

来源：https://stackoverflow.com/questions/49601232/the-sourceset-commontest-is-not-recognized-by-the-android-gradle-plugin-perha