Make own DSL keywords runnable

[robstoll]

I have implemented own extension functions to have a DSL which suits more my needs. For instance, I have a keyword inCase similar to on and itThrows similar to it.

I do not really know how the plugin works but after a quick glance I guess the current keywords a hard-coded in SpekUtil.: If so, then it would be nice if GROUP_FN and TEST_FN would be configurable.

[raniejade]

Will look into it. Thanks!

[berlin-ab]

Plus one. I was recently doing a code kata with the Rock Paper Scissors kata, but I could not get the Spek runner to pick up these tests:

class RockPaperScissorsTest : Spek({
    describe("rock paper scissors outcomes for matches") {
        whenThrowing(rock, and = rock, expect = tieGame)
        whenThrowing(rock, and = paper, expect = playerTwoWins)
        whenThrowing(rock, and = scissors, expect = playerOneWins)
        whenThrowing(paper, and = paper, expect = tieGame)
        whenThrowing(paper, and = rock, expect = playerOneWins)
        whenThrowing(paper, and = scissors, expect = playerTwoWins)
        whenThrowing(scissors, and = scissors, expect = tieGame)
        whenThrowing(scissors, and = paper, expect = playerOneWins)
        whenThrowing(scissors, and = rock, expect = playerTwoWins)
    }
})

private fun SpecBody.whenThrowing(value: String, and: String, expect: String) {
    it("throwing ${value} and ${and}") {
        val result = Game().playRound(value, and)
        assertThat(result).isEqualTo(expect)
    }
}

Using JUnit4's @RunWith(JUnitPlatform::class) picks up the whenThrowing method calls as tests.

[raniejade]

This will be a bit tricky to implement, since I have to rework how UniqueIds are generated. This ids are used to tell JUnit Platform which test to run. Currently the plugin inspects the source and build a UniqueId from it (generation code is in sync with spek-junit-platform-engine). UniqueIds are based on the description passed to test and group. We only use the source during inspection, so dynamic descriptions ("some $value") are not supported.