RobolectricParameterizedExample.kt

@RunWith(ParameterizedRobolectricTestRunner::class)
@Config(sdk = [27])
// parameters declared in the params() are injected through the constructor to the test class
class ExampleUnitTest(private val param: Int) {

    @Test
    fun addition_isCorrect() {
        // parameter use in a test
        assertEquals(param * 2, param + param)
    }

    companion object {
        @JvmStatic
        // name argument is optional, it will show up on the test results
        @ParameterizedRobolectricTestRunner.Parameters(name = "Input: {0}")
        // parameters are provided as arrays, allowing more than one parameter
        fun params() = listOf(
            arrayOf(1),
            arrayOf(2),
            arrayOf(3),
            arrayOf(4)
        )
    }
}