tests: add tests for new transition take feature

tests/test_manual_transaction_trigger.gd

@@ -0,0 +1,59 @@
+extends StateChartTestBase
+
+func test_manual_transaction_trigger():
+	var root := compound_state("root")
+	var a := atomic_state("a", root)
+	var b := atomic_state("b", root)
+
+
+	# add a transition from a to b reacting on the "switch" event
+	var t1 := transition(a, b, "switch", "3")
+	# add a transition back from b to a reacting on the "switch" event	
+	var t2 := transition(b, a, "switch", "3")
+
+	await finish_setup()
+	assert_active(a)
+	assert_inactive(b)
+
+	# when i manually trigger t1
+	t1.take()
+
+	# then we are immediately in b
+	assert_active(b)
+	assert_inactive(a)
+
+	# when i manually trigger t2, but not immediately
+	t2.take(false)
+
+	# we still stay in b
+	assert_active(b)
+	assert_inactive(a)
+
+	await get_tree().create_timer(3.5).timeout
+
+	# and will then be in a after the time has passed
+	assert_active(a)
+	assert_inactive(b)
+
+
+func test_cannot_trigger_transitions_in_inactive_states():
+	var root := compound_state("root")
+	var a := atomic_state("a", root)
+	var b := atomic_state("b", root)
+	var c := atomic_state("c", root)
+
+	var t2 := transition(b, c, "switch")
+
+	await finish_setup()
+	assert_active(a)
+	assert_inactive(b)
+	assert_inactive(c)
+
+	# when i manually trigger a transition in an inactive state
+	t2.take()
+
+	# then nothing will happen
+	assert_active(a)
+	assert_inactive(b)
+	assert_inactive(c)
+