chore: add GUT test framework

addons/gut/test/unit/test_parameter_handler.gd

@@ -0,0 +1,50 @@
+extends GutInternalTester
+
+var ParameterHandler = load('res://addons/gut/parameter_handler.gd')
+
+func test_can_make_one():
+	assert_not_null(ParameterHandler.new([]))
+
+func test_can_get_parsed_parameters():
+	var ph = ParameterHandler.new([1, 2, 3])
+	var results = ph.next_parameters()
+	assert_eq(results, 1)
+
+func test_subsequent_calls_moves_through_array():
+	var ph = ParameterHandler.new([1, 2, 3])
+	var results = ph.next_parameters()
+	results = ph.next_parameters()
+	results = ph.next_parameters()
+	assert_eq(results, 3)
+
+func test_is_done_is_false_by_default():
+	var ph = ParameterHandler.new([1, 2, 3])
+	assert_false(ph.is_done())
+
+func test_is_done_is_false_when_parameters_remain():
+	var ph = ParameterHandler.new([1, 2, 3])
+	var results = ph.next_parameters()
+	results = ph.next_parameters()
+	assert_false(ph.is_done())
+
+func test_is_done_is_true_when_parameters_exhaused():
+	var ph = ParameterHandler.new([1, 2, 3])
+	var results = ph.next_parameters()
+	results = ph.next_parameters()
+	results = ph.next_parameters()
+	assert_true(ph.is_done())
+
+func test_has_logger():
+	assert_has_logger(ParameterHandler.new([]))
+
+func test_passing_non_array_to_constructor_causes_error():
+	ParameterHandler.new('asdf')
+	assert_tracked_gut_error()
+
+func test_when_invalid_constructor_parameter_object_is_setup_correctly():
+	var ph = ParameterHandler.new('asdf')
+	assert_null(ph._params)
+	assert_true(ph.is_done(), 'is_done should be true')
+	assert_tracked_gut_error()
+
+