Fix issue when a layout changes and there's an ongoing transition

test/test.script

@@ -2,11 +2,13 @@ local deftest = require "deftest.deftest"
 
 local test_monarch = require "test.test_monarch"
 local test_callback_tracker = require "test.test_callback_tracker"
+local test_transitions = require "test.test_transitions"
 
 
 function init(self)
 	deftest.add(test_monarch)
 	deftest.add(test_callback_tracker)
+	deftest.add(test_transitions)
 	deftest.run({ 
 		coverage = { enabled = true },
 		pattern = "",

test/test_transitions.lua

@@ -0,0 +1,46 @@
+local cowait = require "test.cowait"
+local mock_msg = require "test.msg"
+local mock_gui = require "deftest.mock.gui"
+local unload = require "deftest.util.unload"
+local monarch = require "monarch.monarch"
+local transitions = require "monarch.transitions.gui"
+local easing = require "monarch.transitions.easings"
+
+return function()
+
+describe("transitions", function()
+	before(function()
+		mock_msg.mock()
+		mock_gui.mock()
+		transitions = require "monarch.transitions.gui"
+	end)
+
+	after(function()
+		mock_msg.unmock()
+		mock_gui.unmock()
+		unload.unload("monarch%..*")
+	end)
+
+
+	it("should replay and immediately finish on layout change", function()
+		function dummy_transition(node, to, easing, duration, delay, cb)
+			print("dummy transition")
+		end
+
+		local node = gui.new_box_node(vmath.vector3(), vmath.vector3(100, 100, 0))
+		local duration = 2
+		local t = transitions.create(node)
+		.show_in(dummy_transition, easing.OUT, duration, delay or 0)
+		.show_out(dummy_transition, easing.IN, duration, delay or 0)
+		.back_in(dummy_transition, easing.OUT, duration, delay or 0)
+		.back_out(dummy_transition, easing.IN, duration, delay or 0)
+
+		t.handle(monarch.TRANSITION.SHOW_IN)
+		t.handle(hash("layout_changed"))
+		local messages = mock_msg.messages(msg.url())
+		assert(#messages == 1, "Expected one message to have been received")
+		assert(messages[1].message_id == monarch.TRANSITION.DONE, "Expected a TRANSITION.DONE message")
+	end)
+end)
+
+end