Test Gruul-Ragnaros interaction

[jleclanche]

[tonyyyye]

I get it right, but it depends on the target ragnaros hits.

    game = prepare_game()
    gruul = game.current_player.give("NEW1_038")
    gruul.play()
    game.current_player.opponent.summon("EX1_298")
    assert gruul.atk == 7
    assert gruul.health == 7
    assert not gruul.buffs
    game.end_turn()
    assert gruul.buffs
    assert gruul.atk == 8
    assert gruul.health == 8
    game.end_turn()
    assert gruul.atk == 9
    assert gruul.health == 1

Maybe a trigger filter can solve this. When it is the end of the ragnaros' turn, if it hits gruul then assert.