chore: add GUT test framework

addons/gut/test/unit/test_dynamic_gdscript.gd

@@ -0,0 +1,54 @@
+extends GutInternalTester
+
+var DynmaicGdScript = load("res://addons/gut/dynamic_gdscript.gd")
+
+var _dyn_gd = null
+var _created_instance_count = 0
+
+func before_each():
+	_dyn_gd = DynmaicGdScript.new()
+	_dyn_gd.default_script_name_no_extension = 'test_create_script_from_source'
+	# makes sure we don't repeat resources paths in tests
+	_dyn_gd.default_script_resource_path = str('res://addons/tests/', _created_instance_count, '/')
+	_created_instance_count += 1
+
+
+func test_can_create_a_script_from_source():
+	var DynScript = _dyn_gd.create_script_from_source('var a = 1')
+	assert_not_null(DynScript)
+
+
+func test_can_create_instance_of_script_from_source():
+	var DynScript = _dyn_gd.create_script_from_source('var a = 1')
+	var i = DynScript.new()
+	assert_eq(i.a, 1)
+
+
+func test_resource_path_is_in_addons_directory():
+	var DynScript = _dyn_gd.create_script_from_source('var a = 1')
+	assert_string_starts_with(DynScript.resource_path, 'res://addons/')
+
+
+func test_each_script_gets_a_unique_resource_path():
+	var DynScript1 = _dyn_gd.create_script_from_source('var a = 1')
+	var DynScript2 = _dyn_gd.create_script_from_source('var a = 1')
+	var DynScript3 = _dyn_gd.create_script_from_source('var a = 1')
+
+	assert_ne(DynScript1.resource_path, DynScript2.resource_path, '1 - 2')
+	assert_ne(DynScript2.resource_path, DynScript3.resource_path, '2 - 3')
+	assert_ne(DynScript1.resource_path, DynScript3.resource_path, '1 - 3')
+
+
+func test_when_override_path_specified_it_is_used_for_resource_path():
+	var DynScript = _dyn_gd.create_script_from_source('var a = 1', 'res://foo/bar.gd')
+	assert_eq(DynScript.resource_path, 'res://foo/bar.gd')
+
+
+func test_when_script_source_invalid_the_error_code_is_returned():
+	if(EngineDebugger.is_active()):
+		pending("Test skipped, disable debug to run test")
+		return
+
+	var DynScript = _dyn_gd.create_script_from_source("asdf\n\n\nasdfasfd\n\nasdf")
+	assert_engine_error("unexpected identifier")
+	assert_eq(typeof(DynScript), TYPE_INT)