When you want to implement Java library testing in Spock with multi-module in Gradle in Android Studio 3

What you want to do

I'm using Gradle in Android Studio 3.x and it's multi-module and includes Java libraries.

I want to implement the test of the Java library in Spock.


There are various ways to install Spock, but I will add it to the module build.gradle. However, the important point of this article is the destinationDir on the last line.

apply plugin: 'groovy'
dependencies {
    testCompileOnly 'org.codehaus.groovy:groovy:2.5.3'
    testCompileOnly('org.spockframework:spock-core:1.2-groovy-2.5') {
        exclude module: 'groovy-all'
compileTestGroovy.destinationDir = compileTestJava.destinationDir


When executed from the triangle that appears to the left of the test class in hoge.groovy, gradle's tax runs compile (compileTestGroovy) as groovy and .class is generated, but it is hoge / build / classes / groovy / test Generated in / . スクリーンショット 2018-11-17 21.37.41.png

But Test in Android Studio? Seems to be JUnit, so it seems that it refers to .class of hoge / build / classes / java / test /. As a result, the test cannot be executed with an error of Class not found:" hogehoge "Empty test suite..

Therefore, set compileTestGroovy.destinationDir to the same .class output destination as Java.

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