extends TestCase
## The showcase of the style samples: how its things move, and that it shows
## every style.


func test_the_plant_grows_from_a_seed_and_starts_again() -> void:
	check_eq(Showcase.growth_at(0.0), 0.0, "a seed at first")
	check(is_equal_approx(Showcase.growth_at(Showcase.GROW_SECONDS / 2.0), 0.5), "half grown halfway")
	check_eq(Showcase.growth_at(Showcase.GROW_SECONDS), 1.0, "grown")
	check_eq(Showcase.growth_at(Showcase.GROW_SECONDS + Showcase.GROWN_SECONDS - 0.01), 1.0, "it stays grown for a while")
	check_eq(Showcase.growth_at(Showcase.GROW_SECONDS + Showcase.GROWN_SECONDS), 0.0, "then a seed again")


func test_the_animal_hops_then_rests_near_its_home() -> void:
	check_eq(Showcase.hop_at(0.0), 0.0, "taking off")
	check(is_equal_approx(Showcase.hop_at(Showcase.HOP_SECONDS / 2.0), 0.5), "in the air")
	check_eq(Showcase.hop_at(Showcase.HOP_SECONDS), 1.0, "landed")
	check_eq(Showcase.hop_at(Showcase.HOP_EVERY - 0.01), 1.0, "resting until the next hop")
	for tenth in 100:
		var at := Showcase.grazer_at(tenth * 0.1)
		check(at.distance_to(Showcase.GRAZER_HOME) <= 1.01, "near home at %.1f s: %s" % [tenth * 0.1, at])


func test_stones_travel_along_the_vine_one_after_another() -> void:
	var start := Showcase.stones_at(0.0)
	check_eq(start.size(), Showcase.STONES, "every stone")
	check_eq(start[0], 0.0, "the first one starts")
	for stone in start:
		check(stone >= 0.0 and stone < 1.0, "on the vine: %f" % stone)
	var later := Showcase.stones_at(1.0)
	check(is_equal_approx(later[0], Showcase.STONE_SPEED), "it moves on")
	var round_trip := Showcase.stones_at(1.0 / Showcase.STONE_SPEED)
	check(is_equal_approx(round_trip[0], 0.0) or is_equal_approx(round_trip[0], 1.0), "and comes round again")


func test_the_ruin_wakes_and_dozes() -> void:
	for tenth in 100:
		var awake := Showcase.awake_at(tenth * 0.1)
		check(awake >= 0.29 and awake <= 1.0, "between dozing and awake: %f" % awake)


func test_the_showcase_shows_every_style_and_names_its_things() -> void:
	I18n.install()
	InputSetup.install()
	var art := Art.new()
	var showcase := Showcase.new()
	showcase.art = art
	tree.root.add_child(showcase)
	for index in art.styles.size():
		showcase.style_buttons[index].pressed.emit()
		check_eq(art.style, art.styles[index], "button %d chooses its style" % (index + 1))
		check(showcase.style_buttons[index].disabled, "the chosen one cannot be pressed again")
		await tree.process_frame
	for key in showcase.caption_keys():
		check(tr(key) != key, "a text for %s" % key)
	var closed := [0]
	showcase.closed.connect(func() -> void: closed[0] += 1)
	showcase.back_button.pressed.emit()
	check_eq(closed[0], 1, "back leads away")
	tree.root.remove_child(showcase)
	showcase.free()