Extension to test with LiveData in JUnit5

InstantTaskExecutorExtension.kt

class InstantTaskExecutorExtension : BeforeAllCallback {
    override fun beforeAll(context: ExtensionContext?) {
        ArchTaskExecutor.getInstance().setDelegate(object : TaskExecutor() {
            override fun executeOnDiskIO(runnable: Runnable) {
                runnable.run()
            }

            override fun postToMainThread(runnable: Runnable) {
                runnable.run()
            }

            override fun isMainThread(): Boolean = true
        })
    }
}