attempting to use gradle test fixtures with gradle 6.6.1, using the following set of plugins
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-parcelize'
apply plugin: 'org.jetbrains.kotlin.kapt'
apply plugin: 'java-test-fixtures'
produces an error along the lines of
org.gradle.internal.metaobject.AbstractDynamicObject$CustomMessageMissingMethodException: Could not find method testFixturesApi() for arguments [io.kotest:kotest-property:4.3.0] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.
(similar results for testFixturesImplementation)
Adding the java-library plugin as apparently required by the documentation:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-parcelize'
apply plugin: 'org.jetbrains.kotlin.kapt'
apply plugin: 'java-test-fixtures'
apply plugin: 'java-library'
yields something along the lines of
The 'java' plugin has been applied, but it is not compatible with the Android plugins.
How can I get gradle testFixtures working when building with kotlin 1.4 (and possibly kotest) for Android on Ubuntu 20.04? My overall intent is to use custom kotest generators for creating property testing fixtures shared among several testing source trees under the same app project, namely
./app/src/test/java
./app/src/androidTest/java
There are good reasons for sharing test helpers in support of code dryness; such approach is not the subject of this discussion; I am not looking for advice in that regard. The goal of this question is a manner to get testFixtures working, since I'm obviously not understanding how to do so, and your help in this direction is much appreciated. I can provide additional details if the above description, deliberately terse, is lacking in necessary detail.
You don't want to put either of those plugins in your application module. The belong in the library module that's producing the fixtures.