t Add unit testing to Godot using DocTest and added to GitHub Actions CI

Implements exit codes into the engine so tests can return their statuses.
Ideally we don't do this, and we use FIXUP logic to 'begin' and 'end' the engine execution for tests specifically.

Since realistically we're initialising the engine here we don't want to do that, since String should not require an engine startup to test a single header.

This lowers the complexity of running the unit tests and even for
physics should be possible to implement such a fix.

1 files changed, 281 insertions, 114 deletions

diff --git a/main/main.cpp b/main/main.cpp
index a500e173a2..e60bdda18d 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -30,6 +30,7 @@
 
 #include "main.h"
 
+#include "core/core_string_names.h"
 #include "core/crypto/crypto.h"
 #include "core/debugger/engine_debugger.h"
 #include "core/input/input.h"
@@ -75,12 +76,14 @@
 #include "servers/xr_server.h"
 
 #ifdef TOOLS_ENABLED
+
 #include "editor/doc_data.h"
 #include "editor/doc_data_class_path.gen.h"
 #include "editor/editor_node.h"
 #include "editor/editor_settings.h"
 #include "editor/progress_dialog.h"
 #include "editor/project_manager.h"
+
 #endif
 
 /* Static members */
@@ -186,7 +189,8 @@ static String get_full_version_string() {
 // to have less code in main.cpp.
 void initialize_physics() {
 	/// 3D Physics Server
-	physics_server = PhysicsServer3DManager::new_server(ProjectSettings::get_singleton()->get(PhysicsServer3DManager::setting_property_name));
+	physics_server = PhysicsServer3DManager::new_server(
+			ProjectSettings::get_singleton()->get(PhysicsServer3DManager::setting_property_name));
 	if (!physics_server) {
 		// Physics server not found, Use the default physics
 		physics_server = PhysicsServer3DManager::new_default_server();
@@ -195,7 +199,8 @@ void initialize_physics() {
 	physics_server->init();
 
 	/// 2D Physics server
-	physics_2d_server = PhysicsServer2DManager::new_server(ProjectSettings::get_singleton()->get(PhysicsServer2DManager::setting_property_name));
+	physics_2d_server = PhysicsServer2DManager::new_server(
+			ProjectSettings::get_singleton()->get(PhysicsServer2DManager::setting_property_name));
 	if (!physics_2d_server) {
 		// Physics server not found, Use the default physics
 		physics_2d_server = PhysicsServer2DManager::new_default_server();
@@ -254,20 +259,25 @@ void Main::print_help(const char *p_binary) {
 	OS::get_singleton()->print("  -h, --help                       Display this help message.\n");
 	OS::get_singleton()->print("  --version                        Display the version string.\n");
 	OS::get_singleton()->print("  -v, --verbose                    Use verbose stdout mode.\n");
-	OS::get_singleton()->print("  --quiet                          Quiet mode, silences stdout messages. Errors are still displayed.\n");
+	OS::get_singleton()->print(
+			"  --quiet                          Quiet mode, silences stdout messages. Errors are still displayed.\n");
 	OS::get_singleton()->print("\n");
 
 	OS::get_singleton()->print("Run options:\n");
 #ifdef TOOLS_ENABLED
 	OS::get_singleton()->print("  -e, --editor                     Start the editor instead of running the scene.\n");
-	OS::get_singleton()->print("  -p, --project-manager            Start the project manager, even if a project is auto-detected.\n");
+	OS::get_singleton()->print(
+			"  -p, --project-manager            Start the project manager, even if a project is auto-detected.\n");
 #endif
 	OS::get_singleton()->print("  -q, --quit                       Quit after the first iteration.\n");
-	OS::get_singleton()->print("  -l, --language <locale>          Use a specific locale (<locale> being a two-letter code).\n");
-	OS::get_singleton()->print("  --path <directory>               Path to a project (<directory> must contain a 'project.godot' file).\n");
+	OS::get_singleton()->print(
+			"  -l, --language <locale>          Use a specific locale (<locale> being a two-letter code).\n");
+	OS::get_singleton()->print(
+			"  --path <directory>               Path to a project (<directory> must contain a 'project.godot' file).\n");
 	OS::get_singleton()->print("  -u, --upwards                    Scan folders upwards for project.godot file.\n");
 	OS::get_singleton()->print("  --main-pack <file>               Path to a pack (.pck) file to load.\n");
-	OS::get_singleton()->print("  --render-thread <mode>           Render thread mode ('unsafe', 'safe', 'separate').\n");
+	OS::get_singleton()->print(
+			"  --render-thread <mode>           Render thread mode ('unsafe', 'safe', 'separate').\n");
 	OS::get_singleton()->print("  --remote-fs <address>            Remote filesystem (<host/IP>[:<port>] address).\n");
 	OS::get_singleton()->print("  --remote-fs-password <password>  Password for remote filesystem.\n");
 
@@ -308,9 +318,12 @@ void Main::print_help(const char *p_binary) {
 	OS::get_singleton()->print("  --resolution <W>x<H>             Request window resolution.\n");
 	OS::get_singleton()->print("  --position <X>,<Y>               Request window position.\n");
 	OS::get_singleton()->print("  --low-dpi                        Force low-DPI mode (macOS and Windows only).\n");
-	OS::get_singleton()->print("  --no-window                      Disable window creation (Windows only). Useful together with --script.\n");
-	OS::get_singleton()->print("  --enable-vsync-via-compositor    When vsync is enabled, vsync via the OS' window compositor (Windows only).\n");
-	OS::get_singleton()->print("  --disable-vsync-via-compositor   Disable vsync via the OS' window compositor (Windows only).\n");
+	OS::get_singleton()->print(
+			"  --no-window                      Disable window creation (Windows only). Useful together with --script.\n");
+	OS::get_singleton()->print(
+			"  --enable-vsync-via-compositor    When vsync is enabled, vsync via the OS' window compositor (Windows only).\n");
+	OS::get_singleton()->print(
+			"  --disable-vsync-via-compositor   Disable vsync via the OS' window compositor (Windows only).\n");
 	OS::get_singleton()->print("  --single-window                  Use a single window (no separate subwindows).\n");
 	OS::get_singleton()->print("  --tablet-driver                  Tablet input driver (");
 	for (int i = 0; i < OS::get_singleton()->get_tablet_driver_count(); i++) {
@@ -324,35 +337,51 @@ void Main::print_help(const char *p_binary) {
 
 	OS::get_singleton()->print("Debug options:\n");
 	OS::get_singleton()->print("  -d, --debug                      Debug (local stdout debugger).\n");
-	OS::get_singleton()->print("  -b, --breakpoints                Breakpoint list as source::line comma-separated pairs, no spaces (use %%20 instead).\n");
+	OS::get_singleton()->print(
+			"  -b, --breakpoints                Breakpoint list as source::line comma-separated pairs, no spaces (use %%20 instead).\n");
 	OS::get_singleton()->print("  --profiling                      Enable profiling in the script debugger.\n");
-	OS::get_singleton()->print("  --gpu-abort                      Abort on GPU errors (usually validation layer errors), may help see the problem if your system freezes.\n");
-	OS::get_singleton()->print("  --remote-debug <uri>             Remote debug (<protocol>://<host/IP>[:<port>], e.g. tcp://127.0.0.1:6007).\n");
+	OS::get_singleton()->print(
+			"  --gpu-abort                      Abort on GPU errors (usually validation layer errors), may help see the problem if your system freezes.\n");
+	OS::get_singleton()->print(
+			"  --remote-debug <uri>             Remote debug (<protocol>://<host/IP>[:<port>], e.g. tcp://127.0.0.1:6007).\n");
 #if defined(DEBUG_ENABLED) && !defined(SERVER_ENABLED)
 	OS::get_singleton()->print("  --debug-collisions               Show collision shapes when running the scene.\n");
 	OS::get_singleton()->print("  --debug-navigation               Show navigation polygons when running the scene.\n");
 #endif
-	OS::get_singleton()->print("  --frame-delay <ms>               Simulate high CPU load (delay each frame by <ms> milliseconds).\n");
-	OS::get_singleton()->print("  --time-scale <scale>             Force time scale (higher values are faster, 1.0 is normal speed).\n");
-	OS::get_singleton()->print("  --disable-render-loop            Disable render loop so rendering only occurs when called explicitly from script.\n");
-	OS::get_singleton()->print("  --disable-crash-handler          Disable crash handler when supported by the platform code.\n");
-	OS::get_singleton()->print("  --fixed-fps <fps>                Force a fixed number of frames per second. This setting disables real-time synchronization.\n");
+	OS::get_singleton()->print(
+			"  --frame-delay <ms>               Simulate high CPU load (delay each frame by <ms> milliseconds).\n");
+	OS::get_singleton()->print(
+			"  --time-scale <scale>             Force time scale (higher values are faster, 1.0 is normal speed).\n");
+	OS::get_singleton()->print(
+			"  --disable-render-loop            Disable render loop so rendering only occurs when called explicitly from script.\n");
+	OS::get_singleton()->print(
+			"  --disable-crash-handler          Disable crash handler when supported by the platform code.\n");
+	OS::get_singleton()->print(
+			"  --fixed-fps <fps>                Force a fixed number of frames per second. This setting disables real-time synchronization.\n");
 	OS::get_singleton()->print("  --print-fps                      Print the frames per second to the stdout.\n");
 	OS::get_singleton()->print("\n");
 
 	OS::get_singleton()->print("Standalone tools:\n");
 	OS::get_singleton()->print("  -s, --script <script>            Run a script.\n");
-	OS::get_singleton()->print("  --check-only                     Only parse for errors and quit (use with --script).\n");
+	OS::get_singleton()->print(
+			"  --check-only                     Only parse for errors and quit (use with --script).\n");
 #ifdef TOOLS_ENABLED
-	OS::get_singleton()->print("  --export <preset> <path>         Export the project using the given preset and matching release template. The preset name should match one defined in export_presets.cfg.\n");
-	OS::get_singleton()->print("                                   <path> should be absolute or relative to the project directory, and include the filename for the binary (e.g. 'builds/game.exe'). The target directory should exist.\n");
+	OS::get_singleton()->print(
+			"  --export <preset> <path>         Export the project using the given preset and matching release template. The preset name should match one defined in export_presets.cfg.\n");
+	OS::get_singleton()->print(
+			"                                   <path> should be absolute or relative to the project directory, and include the filename for the binary (e.g. 'builds/game.exe'). The target directory should exist.\n");
 	OS::get_singleton()->print("  --export-debug <preset> <path>   Same as --export, but using the debug template.\n");
-	OS::get_singleton()->print("  --export-pack <preset> <path>    Same as --export, but only export the game pack for the given preset. The <path> extension determines whether it will be in PCK or ZIP format.\n");
-	OS::get_singleton()->print("  --doctool <path>                 Dump the engine API reference to the given <path> in XML format, merging if existing files are found.\n");
-	OS::get_singleton()->print("  --no-docbase                     Disallow dumping the base types (used with --doctool).\n");
-	OS::get_singleton()->print("  --build-solutions                Build the scripting solutions (e.g. for C# projects). Implies --editor and requires a valid project to edit.\n");
+	OS::get_singleton()->print(
+			"  --export-pack <preset> <path>    Same as --export, but only export the game pack for the given preset. The <path> extension determines whether it will be in PCK or ZIP format.\n");
+	OS::get_singleton()->print(
+			"  --doctool <path>                 Dump the engine API reference to the given <path> in XML format, merging if existing files are found.\n");
+	OS::get_singleton()->print(
+			"  --no-docbase                     Disallow dumping the base types (used with --doctool).\n");
+	OS::get_singleton()->print(
+			"  --build-solutions                Build the scripting solutions (e.g. for C# projects). Implies --editor and requires a valid project to edit.\n");
 #ifdef DEBUG_METHODS_ENABLED
-	OS::get_singleton()->print("  --gdnative-generate-json-api     Generate JSON dump of the Godot API for GDNative bindings.\n");
+	OS::get_singleton()->print(
+			"  --gdnative-generate-json-api     Generate JSON dump of the Godot API for GDNative bindings.\n");
 #endif
 	OS::get_singleton()->print("  --test <test>                    Run a unit test [");
 	const char **test_names = tests_get_names();
@@ -366,6 +395,23 @@ void Main::print_help(const char *p_binary) {
 #endif
 }
 
+int Main::test_entrypoint(int argc, char *argv[], bool &tests_need_run) {
+#ifdef TOOLS_ENABLED // templates can't run unit test tool
+	OS::get_singleton()->initialize();
+	StringName::setup();
+	for (int x = 0; x < argc; x++) {
+		if (strncmp(argv[x], "--test", 6)) {
+			tests_need_run = true;
+			return test_main(argc, argv);
+		}
+	}
+	StringName::cleanup();
+	OS::get_singleton()->finalize();
+#endif
+	tests_need_run = false;
+	return 0;
+}
+
 /* Engine initialization
  *
  * Consists of several methods that are called by each platform's specific main(argc, argv).
@@ -418,7 +464,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	ClassDB::register_class<Performance>();
 	engine->add_singleton(Engine::Singleton("Performance", performance));
 
-	GLOBAL_DEF("debug/settings/crash_handler/message", String("Please include this when reporting the bug on https://github.com/godotengine/godot/issues"));
+	GLOBAL_DEF("debug/settings/crash_handler/message",
+			String("Please include this when reporting the bug on https://github.com/godotengine/godot/issues"));
 
 	MAIN_PRINT("Main: Parse CMDLine");
 
@@ -523,7 +570,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				}
 
 				if (!found) {
-					OS::get_singleton()->print("Unknown audio driver '%s', aborting.\nValid options are ", audio_driver.utf8().get_data());
+					OS::get_singleton()->print("Unknown audio driver '%s', aborting.\nValid options are ",
+							audio_driver.utf8().get_data());
 
 					for (int i = 0; i < AudioDriverManager::get_driver_count(); i++) {
 						if (i == AudioDriverManager::get_driver_count() - 1) {
@@ -559,7 +607,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				}
 
 				if (!found) {
-					OS::get_singleton()->print("Unknown display driver '%s', aborting.\nValid options are ", display_driver.utf8().get_data());
+					OS::get_singleton()->print("Unknown display driver '%s', aborting.\nValid options are ",
+							display_driver.utf8().get_data());
 
 					for (int i = 0; i < DisplayServer::get_create_function_count(); i++) {
 						if (i == DisplayServer::get_create_function_count() - 1) {
@@ -607,7 +656,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				}
 
 				if (!found) {
-					OS::get_singleton()->print("Unknown tablet driver '%s', aborting.\n", tablet_driver.utf8().get_data());
+					OS::get_singleton()->print("Unknown tablet driver '%s', aborting.\n",
+							tablet_driver.utf8().get_data());
 					goto error;
 				}
 
@@ -629,7 +679,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				if (vm.find("x") == -1) { // invalid parameter format
 
-					OS::get_singleton()->print("Invalid resolution '%s', it should be e.g. '1280x720'.\n", vm.utf8().get_data());
+					OS::get_singleton()->print("Invalid resolution '%s', it should be e.g. '1280x720'.\n",
+							vm.utf8().get_data());
 					goto error;
 				}
 
@@ -637,7 +688,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 				int h = vm.get_slice("x", 1).to_int();
 
 				if (w <= 0 || h <= 0) {
-					OS::get_singleton()->print("Invalid resolution '%s', width and height must be above 0.\n", vm.utf8().get_data());
+					OS::get_singleton()->print("Invalid resolution '%s', width and height must be above 0.\n",
+							vm.utf8().get_data());
 					goto error;
 				}
 
@@ -658,7 +710,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 				if (vm.find(",") == -1) { // invalid parameter format
 
-					OS::get_singleton()->print("Invalid position '%s', it should be e.g. '80,128'.\n", vm.utf8().get_data());
+					OS::get_singleton()->print("Invalid position '%s', it should be e.g. '80,128'.\n",
+							vm.utf8().get_data());
 					goto error;
 				}
 
@@ -754,7 +807,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 			// We still pass it to the main arguments since the argument handling itself is not done in this function
 			main_args.push_back(I->get());
 #endif
-		} else if (I->get() == "--export" || I->get() == "--export-debug" || I->get() == "--export-pack") { // Export project
+		} else if (I->get() == "--export" || I->get() == "--export-debug" ||
+				   I->get() == "--export-pack") { // Export project
 
 			editor = true;
 			main_args.push_back(I->get());
@@ -847,7 +901,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 			if (I->next()) {
 				debug_uri = I->next()->get();
 				if (debug_uri.find("://") == -1) { // wrong address
-					OS::get_singleton()->print("Invalid debug host address, it should be of the form <protocol>://<host/IP>:<port>.\n");
+					OS::get_singleton()->print(
+							"Invalid debug host address, it should be of the form <protocol>://<host/IP>:<port>.\n");
 					goto error;
 				}
 				N = I->next()->next();
@@ -888,7 +943,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 #ifdef TOOLS_ENABLED
 	if (editor && project_manager) {
-		OS::get_singleton()->print("Error: Command line arguments implied opening both editor and project manager, which is not possible. Aborting.\n");
+		OS::get_singleton()->print(
+				"Error: Command line arguments implied opening both editor and project manager, which is not possible. Aborting.\n");
 		goto error;
 	}
 #endif
@@ -935,15 +991,35 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	OS::get_singleton()->ensure_user_data_dir();
 
 	GLOBAL_DEF("memory/limits/multithreaded_server/rid_pool_prealloc", 60);
-	ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/multithreaded_server/rid_pool_prealloc", PropertyInfo(Variant::INT, "memory/limits/multithreaded_server/rid_pool_prealloc", PROPERTY_HINT_RANGE, "0,500,1")); // No negative and limit to 500 due to crashes
+	ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/multithreaded_server/rid_pool_prealloc",
+			PropertyInfo(Variant::INT,
+					"memory/limits/multithreaded_server/rid_pool_prealloc",
+					PROPERTY_HINT_RANGE,
+					"0,500,1")); // No negative and limit to 500 due to crashes
 	GLOBAL_DEF("network/limits/debugger/max_chars_per_second", 32768);
-	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_chars_per_second", PropertyInfo(Variant::INT, "network/limits/debugger/max_chars_per_second", PROPERTY_HINT_RANGE, "0, 4096, 1, or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_chars_per_second",
+			PropertyInfo(Variant::INT,
+					"network/limits/debugger/max_chars_per_second",
+					PROPERTY_HINT_RANGE,
+					"0, 4096, 1, or_greater"));
 	GLOBAL_DEF("network/limits/debugger/max_queued_messages", 2048);
-	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_queued_messages", PropertyInfo(Variant::INT, "network/limits/debugger/max_queued_messages", PROPERTY_HINT_RANGE, "0, 8192, 1, or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_queued_messages",
+			PropertyInfo(Variant::INT,
+					"network/limits/debugger/max_queued_messages",
+					PROPERTY_HINT_RANGE,
+					"0, 8192, 1, or_greater"));
 	GLOBAL_DEF("network/limits/debugger/max_errors_per_second", 400);
-	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_errors_per_second", PropertyInfo(Variant::INT, "network/limits/debugger/max_errors_per_second", PROPERTY_HINT_RANGE, "0, 200, 1, or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_errors_per_second",
+			PropertyInfo(Variant::INT,
+					"network/limits/debugger/max_errors_per_second",
+					PROPERTY_HINT_RANGE,
+					"0, 200, 1, or_greater"));
 	GLOBAL_DEF("network/limits/debugger/max_warnings_per_second", 400);
-	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_warnings_per_second", PropertyInfo(Variant::INT, "network/limits/debugger/max_warnings_per_second", PROPERTY_HINT_RANGE, "0, 200, 1, or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger/max_warnings_per_second",
+			PropertyInfo(Variant::INT,
+					"network/limits/debugger/max_warnings_per_second",
+					PROPERTY_HINT_RANGE,
+					"0, 200, 1, or_greater"));
 
 	EngineDebugger::initialize(debug_uri, skip_breakpoints, breakpoints);
 
@@ -978,8 +1054,13 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	GLOBAL_DEF("logging/file_logging/enable_file_logging.pc", true);
 	GLOBAL_DEF("logging/file_logging/log_path", "user://logs/godot.log");
 	GLOBAL_DEF("logging/file_logging/max_log_files", 5);
-	ProjectSettings::get_singleton()->set_custom_property_info("logging/file_logging/max_log_files", PropertyInfo(Variant::INT, "logging/file_logging/max_log_files", PROPERTY_HINT_RANGE, "0,20,1,or_greater")); //no negative numbers
-	if (!project_manager && !editor && FileAccess::get_create_func(FileAccess::ACCESS_USERDATA) && GLOBAL_GET("logging/file_logging/enable_file_logging")) {
+	ProjectSettings::get_singleton()->set_custom_property_info("logging/file_logging/max_log_files",
+			PropertyInfo(Variant::INT,
+					"logging/file_logging/max_log_files",
+					PROPERTY_HINT_RANGE,
+					"0,20,1,or_greater")); //no negative numbers
+	if (!project_manager && !editor && FileAccess::get_create_func(FileAccess::ACCESS_USERDATA) &&
+			GLOBAL_GET("logging/file_logging/enable_file_logging")) {
 		// Don't create logs for the project manager as they would be written to
 		// the current working directory, which is inconvenient.
 		String base_path = GLOBAL_GET("logging/file_logging/log_path");
@@ -1020,7 +1101,10 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	OS::get_singleton()->set_cmdline(execpath, main_args);
 
 	GLOBAL_DEF("rendering/quality/driver/driver_name", "Vulkan");
-	ProjectSettings::get_singleton()->set_custom_property_info("rendering/quality/driver/driver_name", PropertyInfo(Variant::STRING, "rendering/quality/driver/driver_name", PROPERTY_HINT_ENUM, "Vulkan,GLES2"));
+	ProjectSettings::get_singleton()->set_custom_property_info("rendering/quality/driver/driver_name",
+			PropertyInfo(Variant::STRING,
+					"rendering/quality/driver/driver_name",
+					PROPERTY_HINT_ENUM, "Vulkan,GLES2"));
 	if (display_driver == "") {
 		display_driver = GLOBAL_GET("rendering/quality/driver/driver_name");
 	}
@@ -1029,24 +1113,39 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	GLOBAL_DEF("rendering/quality/2d/gles2_use_nvidia_rect_flicker_workaround", false);
 
 	GLOBAL_DEF("display/window/size/width", 1024);
-	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/width", PropertyInfo(Variant::INT, "display/window/size/width", PROPERTY_HINT_RANGE, "0,7680,or_greater")); // 8K resolution
+	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/width",
+			PropertyInfo(Variant::INT, "display/window/size/width",
+					PROPERTY_HINT_RANGE,
+					"0,7680,or_greater")); // 8K resolution
 	GLOBAL_DEF("display/window/size/height", 600);
-	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/height", PropertyInfo(Variant::INT, "display/window/size/height", PROPERTY_HINT_RANGE, "0,4320,or_greater")); // 8K resolution
+	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/height",
+			PropertyInfo(Variant::INT, "display/window/size/height",
+					PROPERTY_HINT_RANGE,
+					"0,4320,or_greater")); // 8K resolution
 	GLOBAL_DEF("display/window/size/resizable", true);
 	GLOBAL_DEF("display/window/size/borderless", false);
 	GLOBAL_DEF("display/window/size/fullscreen", false);
 	GLOBAL_DEF("display/window/size/always_on_top", false);
 	GLOBAL_DEF("display/window/size/test_width", 0);
-	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/test_width", PropertyInfo(Variant::INT, "display/window/size/test_width", PROPERTY_HINT_RANGE, "0,7680,or_greater")); // 8K resolution
+	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/test_width",
+			PropertyInfo(Variant::INT,
+					"display/window/size/test_width",
+					PROPERTY_HINT_RANGE,
+					"0,7680,or_greater")); // 8K resolution
 	GLOBAL_DEF("display/window/size/test_height", 0);
-	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/test_height", PropertyInfo(Variant::INT, "display/window/size/test_height", PROPERTY_HINT_RANGE, "0,4320,or_greater")); // 8K resolution
+	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/test_height",
+			PropertyInfo(Variant::INT,
+					"display/window/size/test_height",
+					PROPERTY_HINT_RANGE,
+					"0,4320,or_greater")); // 8K resolution
 
 	if (use_custom_res) {
 		if (!force_res) {
 			window_size.width = GLOBAL_GET("display/window/size/width");
 			window_size.height = GLOBAL_GET("display/window/size/height");
 
-			if (globals->has_setting("display/window/size/test_width") && globals->has_setting("display/window/size/test_height")) {
+			if (globals->has_setting("display/window/size/test_width") &&
+					globals->has_setting("display/window/size/test_height")) {
 				int tw = globals->get("display/window/size/test_width");
 				if (tw > 0) {
 					window_size.width = tw;
@@ -1106,8 +1205,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	}
 
 	/* todo restore
-	OS::get_singleton()->_allow_layered = GLOBAL_DEF("display/window/per_pixel_transparency/allowed", false);
-	video_mode.layered = GLOBAL_DEF("display/window/per_pixel_transparency/enabled", false);
+    OS::get_singleton()->_allow_layered = GLOBAL_DEF("display/window/per_pixel_transparency/allowed", false);
+    video_mode.layered = GLOBAL_DEF("display/window/per_pixel_transparency/enabled", false);
 */
 	GLOBAL_DEF("rendering/quality/intended_usage/framebuffer_allocation", 2);
 	GLOBAL_DEF("rendering/quality/intended_usage/framebuffer_allocation.mobile", 3);
@@ -1180,10 +1279,15 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	}
 
 	Engine::get_singleton()->set_iterations_per_second(GLOBAL_DEF("physics/common/physics_fps", 60));
-	ProjectSettings::get_singleton()->set_custom_property_info("physics/common/physics_fps", PropertyInfo(Variant::INT, "physics/common/physics_fps", PROPERTY_HINT_RANGE, "1,120,1,or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("physics/common/physics_fps",
+			PropertyInfo(Variant::INT, "physics/common/physics_fps",
+					PROPERTY_HINT_RANGE, "1,120,1,or_greater"));
 	Engine::get_singleton()->set_physics_jitter_fix(GLOBAL_DEF("physics/common/physics_jitter_fix", 0.5));
 	Engine::get_singleton()->set_target_fps(GLOBAL_DEF("debug/settings/fps/force_fps", 0));
-	ProjectSettings::get_singleton()->set_custom_property_info("debug/settings/fps/force_fps", PropertyInfo(Variant::INT, "debug/settings/fps/force_fps", PROPERTY_HINT_RANGE, "0,120,1,or_greater"));
+	ProjectSettings::get_singleton()->set_custom_property_info("debug/settings/fps/force_fps",
+			PropertyInfo(Variant::INT,
+					"debug/settings/fps/force_fps",
+					PROPERTY_HINT_RANGE, "0,120,1,or_greater"));
 
 	GLOBAL_DEF("debug/settings/stdout/print_fps", false);
 	GLOBAL_DEF("debug/settings/stdout/verbose_stdout", false);
@@ -1194,12 +1298,21 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 	if (frame_delay == 0) {
 		frame_delay = GLOBAL_DEF("application/run/frame_delay_msec", 0);
-		ProjectSettings::get_singleton()->set_custom_property_info("application/run/frame_delay_msec", PropertyInfo(Variant::INT, "application/run/frame_delay_msec", PROPERTY_HINT_RANGE, "0,100,1,or_greater")); // No negative numbers
+		ProjectSettings::get_singleton()->set_custom_property_info("application/run/frame_delay_msec",
+				PropertyInfo(Variant::INT,
+						"application/run/frame_delay_msec",
+						PROPERTY_HINT_RANGE,
+						"0,100,1,or_greater")); // No negative numbers
 	}
 
 	OS::get_singleton()->set_low_processor_usage_mode(GLOBAL_DEF("application/run/low_processor_mode", false));
-	OS::get_singleton()->set_low_processor_usage_mode_sleep_usec(GLOBAL_DEF("application/run/low_processor_mode_sleep_usec", 6900)); // Roughly 144 FPS
-	ProjectSettings::get_singleton()->set_custom_property_info("application/run/low_processor_mode_sleep_usec", PropertyInfo(Variant::INT, "application/run/low_processor_mode_sleep_usec", PROPERTY_HINT_RANGE, "0,33200,1,or_greater")); // No negative numbers
+	OS::get_singleton()->set_low_processor_usage_mode_sleep_usec(
+			GLOBAL_DEF("application/run/low_processor_mode_sleep_usec", 6900)); // Roughly 144 FPS
+	ProjectSettings::get_singleton()->set_custom_property_info("application/run/low_processor_mode_sleep_usec",
+			PropertyInfo(Variant::INT,
+					"application/run/low_processor_mode_sleep_usec",
+					PROPERTY_HINT_RANGE,
+					"0,33200,1,or_greater")); // No negative numbers
 
 	GLOBAL_DEF("display/window/ios/hide_home_indicator", true);
 
@@ -1286,14 +1399,16 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 		String rendering_driver; // temp broken
 
 		Error err;
-		display_server = DisplayServer::create(display_driver_idx, rendering_driver, window_mode, window_flags, window_size, err);
+		display_server = DisplayServer::create(display_driver_idx, rendering_driver, window_mode, window_flags,
+				window_size, err);
 		if (err != OK) {
 			//ok i guess we can't use this display server, try other ones
 			for (int i = 0; i < DisplayServer::get_create_function_count(); i++) {
 				if (i == display_driver_idx) {
 					continue; //don't try the same twice
 				}
-				display_server = DisplayServer::create(display_driver_idx, rendering_driver, window_mode, window_flags, window_size, err);
+				display_server = DisplayServer::create(display_driver_idx, rendering_driver, window_mode, window_flags,
+						window_size, err);
 				if (err == OK) {
 					break;
 				}
@@ -1314,7 +1429,9 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 
 	rendering_server = memnew(RenderingServerRaster);
 	if (OS::get_singleton()->get_render_thread_mode() != OS::RENDER_THREAD_UNSAFE) {
-		rendering_server = memnew(RenderingServerWrapMT(rendering_server, OS::get_singleton()->get_render_thread_mode() == OS::RENDER_SEPARATE_THREAD));
+		rendering_server = memnew(RenderingServerWrapMT(rendering_server,
+				OS::get_singleton()->get_render_thread_mode() ==
+						OS::RENDER_SEPARATE_THREAD));
 	}
 
 	rendering_server->init();
@@ -1379,7 +1496,10 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 		String boot_logo_path = GLOBAL_DEF("application/boot_splash/image", String());
 		bool boot_logo_scale = GLOBAL_DEF("application/boot_splash/fullsize", true);
 		bool boot_logo_filter = GLOBAL_DEF("application/boot_splash/use_filter", true);
-		ProjectSettings::get_singleton()->set_custom_property_info("application/boot_splash/image", PropertyInfo(Variant::STRING, "application/boot_splash/image", PROPERTY_HINT_FILE, "*.png"));
+		ProjectSettings::get_singleton()->set_custom_property_info("application/boot_splash/image",
+				PropertyInfo(Variant::STRING,
+						"application/boot_splash/image",
+						PROPERTY_HINT_FILE, "*.png"));
 
 		Ref<Image> boot_logo;
 
@@ -1396,7 +1516,8 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 		Color boot_bg_color = GLOBAL_DEF("application/boot_splash/bg_color", boot_splash_bg_color);
 		if (boot_logo.is_valid()) {
 			OS::get_singleton()->_msec_splash = OS::get_singleton()->get_ticks_msec();
-			RenderingServer::get_singleton()->set_boot_image(boot_logo, boot_bg_color, boot_logo_scale, boot_logo_filter);
+			RenderingServer::get_singleton()->set_boot_image(boot_logo, boot_bg_color, boot_logo_scale,
+					boot_logo_filter);
 
 		} else {
 #ifndef NO_DEFAULT_BOOT_LOGO
@@ -1421,21 +1542,31 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 	}
 
 	MAIN_PRINT("Main: DCC");
-	RenderingServer::get_singleton()->set_default_clear_color(GLOBAL_DEF("rendering/environment/default_clear_color", Color(0.3, 0.3, 0.3)));
+	RenderingServer::get_singleton()->set_default_clear_color(
+			GLOBAL_DEF("rendering/environment/default_clear_color", Color(0.3, 0.3, 0.3)));
 	MAIN_PRINT("Main: END");
 
 	GLOBAL_DEF("application/config/icon", String());
-	ProjectSettings::get_singleton()->set_custom_property_info("application/config/icon", PropertyInfo(Variant::STRING, "application/config/icon", PROPERTY_HINT_FILE, "*.png,*.webp"));
+	ProjectSettings::get_singleton()->set_custom_property_info("application/config/icon",
+			PropertyInfo(Variant::STRING, "application/config/icon",
+					PROPERTY_HINT_FILE, "*.png,*.webp"));
 
 	GLOBAL_DEF("application/config/macos_native_icon", String());
-	ProjectSettings::get_singleton()->set_custom_property_info("application/config/macos_native_icon", PropertyInfo(Variant::STRING, "application/config/macos_native_icon", PROPERTY_HINT_FILE, "*.icns"));
+	ProjectSettings::get_singleton()->set_custom_property_info("application/config/macos_native_icon",
+			PropertyInfo(Variant::STRING,
+					"application/config/macos_native_icon",
+					PROPERTY_HINT_FILE, "*.icns"));
 
 	GLOBAL_DEF("application/config/windows_native_icon", String());
-	ProjectSettings::get_singleton()->set_custom_property_info("application/config/windows_native_icon", PropertyInfo(Variant::STRING, "application/config/windows_native_icon", PROPERTY_HINT_FILE, "*.ico"));
+	ProjectSettings::get_singleton()->set_custom_property_info("application/config/windows_native_icon",
+			PropertyInfo(Variant::STRING,
+					"application/config/windows_native_icon",
+					PROPERTY_HINT_FILE, "*.ico"));
 
 	Input *id = Input::get_singleton();
 	if (id) {
-		if (bool(GLOBAL_DEF("input_devices/pointing/emulate_touch_from_mouse", false)) && !(editor || project_manager)) {
+		if (bool(GLOBAL_DEF("input_devices/pointing/emulate_touch_from_mouse", false)) &&
+				!(editor || project_manager)) {
 			bool found_touchscreen = false;
 			for (int i = 0; i < DisplayServer::get_singleton()->get_screen_count(); i++) {
 				if (DisplayServer::get_singleton()->screen_is_touchscreen(i)) {
@@ -1460,10 +1591,14 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
 	GLOBAL_DEF("display/mouse_cursor/custom_image", String());
 	GLOBAL_DEF("display/mouse_cursor/custom_image_hotspot", Vector2());
 	GLOBAL_DEF("display/mouse_cursor/tooltip_position_offset", Point2(10, 10));
-	ProjectSettings::get_singleton()->set_custom_property_info("display/mouse_cursor/custom_image", PropertyInfo(Variant::STRING, "display/mouse_cursor/custom_image", PROPERTY_HINT_FILE, "*.png,*.webp"));
+	ProjectSettings::get_singleton()->set_custom_property_info("display/mouse_cursor/custom_image",
+			PropertyInfo(Variant::STRING,
+					"display/mouse_cursor/custom_image",
+					PROPERTY_HINT_FILE, "*.png,*.webp"));
 
 	if (String(ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image")) != String()) {
-		Ref<Texture2D> cursor = ResourceLoader::load(ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image"));
+		Ref<Texture2D> cursor = ResourceLoader::load(
+				ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image"));
 		if (cursor.is_valid()) {
 			Vector2 hotspot = ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image_hotspot");
 			Input::get_singleton()->set_custom_mouse_cursor(cursor, Input::CURSOR_ARROW, hotspot);
@@ -1544,7 +1679,6 @@ bool Main::start() {
 	String positional_arg;
 	String game_path;
 	String script;
-	String test;
 	bool check_only = false;
 
 #ifdef TOOLS_ENABLED
@@ -1555,10 +1689,12 @@ bool Main::start() {
 #endif
 
 	main_timer_sync.init(OS::get_singleton()->get_ticks_usec());
-
 	List<String> args = OS::get_singleton()->get_cmdline_args();
+
+	// parameters that do not have an argument to the right
 	for (int i = 0; i < args.size(); i++) {
-		//parameters that do not have an argument to the right
+		// Doctest Unit Testing Handler
+		// Designed to override and pass arguments to the unit test handler.
 		if (args[i] == "--check-only") {
 			check_only = true;
 #ifdef TOOLS_ENABLED
@@ -1591,8 +1727,6 @@ bool Main::start() {
 			bool parsed_pair = true;
 			if (args[i] == "-s" || args[i] == "--script") {
 				script = args[i + 1];
-			} else if (args[i] == "--test") {
-				test = args[i + 1];
 #ifdef TOOLS_ENABLED
 			} else if (args[i] == "--doctool") {
 				doc_tool = args[i + 1];
@@ -1624,7 +1758,8 @@ bool Main::start() {
 	String main_loop_type;
 #ifdef TOOLS_ENABLED
 	if (doc_tool != "") {
-		Engine::get_singleton()->set_editor_hint(true); // Needed to instance editor-only classes for their default values
+		Engine::get_singleton()->set_editor_hint(
+				true); // Needed to instance editor-only classes for their default values
 
 		{
 			DirAccessRef da = DirAccess::open(doc_tool);
@@ -1694,7 +1829,7 @@ bool Main::start() {
 		print_line("Generating new docs...");
 		doc.save_classes(index_path, doc_data_classes);
 
-		return false;
+		return FAILED;
 	}
 
 	if (_export_preset != "") {
@@ -1702,7 +1837,7 @@ bool Main::start() {
 			String err = "Command line includes export parameter option, but no destination path was given.\n";
 			err += "Please specify the binary's file path to export to. Aborting export.";
 			ERR_PRINT(err);
-			return false;
+			return FAILED;
 		}
 	}
 #endif
@@ -1716,16 +1851,7 @@ bool Main::start() {
 		main_loop = memnew(SceneTree);
 	};
 
-	if (test != "") {
-#ifdef TOOLS_ENABLED
-		main_loop = test_main(test, args);
-
-		if (!main_loop) {
-			return false;
-		}
-#endif
-
-	} else if (script != "") {
+	if (script != "") {
 		Ref<Script> script_res = ResourceLoader::load(script);
 		ERR_FAIL_COND_V_MSG(script_res.is_null(), false, "Can't load script: " + script);
 
@@ -1733,7 +1859,7 @@ bool Main::start() {
 			if (!script_res->is_valid()) {
 				OS::get_singleton()->set_exit_code(1);
 			}
-			return false;
+			return FAILED;
 		}
 
 		if (script_res->can_instance()) {
@@ -1744,13 +1870,15 @@ bool Main::start() {
 				if (obj) {
 					memdelete(obj);
 				}
-				ERR_FAIL_V_MSG(false, vformat("Can't load the script \"%s\" as it doesn't inherit from SceneTree or MainLoop.", script));
+				ERR_FAIL_V_MSG(false,
+						vformat("Can't load the script \"%s\" as it doesn't inherit from SceneTree or MainLoop.",
+								script));
 			}
 
 			script_loop->set_init_script(script_res);
 			main_loop = script_loop;
 		} else {
-			return false;
+			return FAILED;
 		}
 
 	} else {
@@ -1764,7 +1892,7 @@ bool Main::start() {
 	if (!main_loop) {
 		if (!ClassDB::class_exists(main_loop_type)) {
 			DisplayServer::get_singleton()->alert("Error: MainLoop type doesn't exist: " + main_loop_type);
-			return false;
+			return FAILED;
 		} else {
 			Object *ml = ClassDB::instance(main_loop_type);
 			ERR_FAIL_COND_V_MSG(!ml, false, "Can't instance MainLoop type.");
@@ -1832,7 +1960,9 @@ bool Main::start() {
 
 						Object *obj = ClassDB::instance(ibt);
 
-						ERR_CONTINUE_MSG(obj == nullptr, "Cannot instance script for autoload, expected 'Node' inheritance, got: " + String(ibt));
+						ERR_CONTINUE_MSG(obj == nullptr,
+								"Cannot instance script for autoload, expected 'Node' inheritance, got: " +
+										String(ibt));
 
 						n = Object::cast_to<Node>(obj);
 						n->set_script(script_res);
@@ -1880,7 +2010,8 @@ bool Main::start() {
 
 			String stretch_mode = GLOBAL_DEF("display/window/stretch/mode", "disabled");
 			String stretch_aspect = GLOBAL_DEF("display/window/stretch/aspect", "ignore");
-			Size2i stretch_size = Size2(GLOBAL_DEF("display/window/size/width", 0), GLOBAL_DEF("display/window/size/height", 0));
+			Size2i stretch_size = Size2(GLOBAL_DEF("display/window/size/width", 0),
+					GLOBAL_DEF("display/window/size/height", 0));
 
 			Window::ContentScaleMode cs_sm = Window::CONTENT_SCALE_MODE_DISABLED;
 			if (stretch_mode == "canvas_items") {
@@ -1924,10 +2055,14 @@ bool Main::start() {
 			int shadow_atlas_q3_subdiv = GLOBAL_GET("rendering/quality/shadow_atlas/quadrant_3_subdiv");
 
 			sml->get_root()->set_shadow_atlas_size(shadow_atlas_size);
-			sml->get_root()->set_shadow_atlas_quadrant_subdiv(0, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q0_subdiv));
-			sml->get_root()->set_shadow_atlas_quadrant_subdiv(1, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q1_subdiv));
-			sml->get_root()->set_shadow_atlas_quadrant_subdiv(2, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q2_subdiv));
-			sml->get_root()->set_shadow_atlas_quadrant_subdiv(3, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q3_subdiv));
+			sml->get_root()->set_shadow_atlas_quadrant_subdiv(0, Viewport::ShadowAtlasQuadrantSubdiv(
+																		 shadow_atlas_q0_subdiv));
+			sml->get_root()->set_shadow_atlas_quadrant_subdiv(1, Viewport::ShadowAtlasQuadrantSubdiv(
+																		 shadow_atlas_q1_subdiv));
+			sml->get_root()->set_shadow_atlas_quadrant_subdiv(2, Viewport::ShadowAtlasQuadrantSubdiv(
+																		 shadow_atlas_q2_subdiv));
+			sml->get_root()->set_shadow_atlas_quadrant_subdiv(3, Viewport::ShadowAtlasQuadrantSubdiv(
+																		 shadow_atlas_q3_subdiv));
 
 			bool snap_controls = GLOBAL_DEF("gui/common/snap_controls_to_pixels", true);
 			sml->get_root()->set_snap_controls_to_pixels(snap_controls);
@@ -1937,30 +2072,51 @@ bool Main::start() {
 
 			int texture_filter = GLOBAL_DEF("rendering/canvas_textures/default_texture_filter", 1);
 			int texture_repeat = GLOBAL_DEF("rendering/canvas_textures/default_texture_repeat", 0);
-			sml->get_root()->set_default_canvas_item_texture_filter(Viewport::DefaultCanvasItemTextureFilter(texture_filter));
-			sml->get_root()->set_default_canvas_item_texture_repeat(Viewport::DefaultCanvasItemTextureRepeat(texture_repeat));
+			sml->get_root()->set_default_canvas_item_texture_filter(
+					Viewport::DefaultCanvasItemTextureFilter(texture_filter));
+			sml->get_root()->set_default_canvas_item_texture_repeat(
+					Viewport::DefaultCanvasItemTextureRepeat(texture_repeat));
 
 		} else {
 			GLOBAL_DEF("display/window/stretch/mode", "disabled");
-			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/mode", PropertyInfo(Variant::STRING, "display/window/stretch/mode", PROPERTY_HINT_ENUM, "disabled,canvas_items,viewport"));
+			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/mode",
+					PropertyInfo(Variant::STRING,
+							"display/window/stretch/mode",
+							PROPERTY_HINT_ENUM,
+							"disabled,canvas_items,viewport"));
 			GLOBAL_DEF("display/window/stretch/aspect", "ignore");
-			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/aspect", PropertyInfo(Variant::STRING, "display/window/stretch/aspect", PROPERTY_HINT_ENUM, "ignore,keep,keep_width,keep_height,expand"));
+			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/aspect",
+					PropertyInfo(Variant::STRING,
+							"display/window/stretch/aspect",
+							PROPERTY_HINT_ENUM,
+							"ignore,keep,keep_width,keep_height,expand"));
 			GLOBAL_DEF("display/window/stretch/shrink", 1.0);
-			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/shrink", PropertyInfo(Variant::FLOAT, "display/window/stretch/shrink", PROPERTY_HINT_RANGE, "1.0,8.0,0.1"));
+			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/shrink",
+					PropertyInfo(Variant::FLOAT,
+							"display/window/stretch/shrink",
+							PROPERTY_HINT_RANGE,
+							"1.0,8.0,0.1"));
 			sml->set_auto_accept_quit(GLOBAL_DEF("application/config/auto_accept_quit", true));
 			sml->set_quit_on_go_back(GLOBAL_DEF("application/config/quit_on_go_back", true));
 			GLOBAL_DEF("gui/common/snap_controls_to_pixels", true);
 			GLOBAL_DEF("rendering/quality/dynamic_fonts/use_oversampling", true);
 
 			GLOBAL_DEF("rendering/canvas_textures/default_texture_filter", 1);
-			ProjectSettings::get_singleton()->set_custom_property_info("rendering/canvas_textures/default_texture_filter", PropertyInfo(Variant::INT, "rendering/canvas_textures/default_texture_filter", PROPERTY_HINT_ENUM, "Nearest,Linear,MipmapLinear,MipmapNearest"));
+			ProjectSettings::get_singleton()->set_custom_property_info(
+					"rendering/canvas_textures/default_texture_filter",
+					PropertyInfo(Variant::INT, "rendering/canvas_textures/default_texture_filter", PROPERTY_HINT_ENUM,
+							"Nearest,Linear,MipmapLinear,MipmapNearest"));
 			GLOBAL_DEF("rendering/canvas_textures/default_texture_repeat", 0);
-			ProjectSettings::get_singleton()->set_custom_property_info("rendering/canvas_textures/default_texture_repeat", PropertyInfo(Variant::INT, "rendering/canvas_textures/default_texture_repeat", PROPERTY_HINT_ENUM, "Disable,Enable,Mirror"));
+			ProjectSettings::get_singleton()->set_custom_property_info(
+					"rendering/canvas_textures/default_texture_repeat",
+					PropertyInfo(Variant::INT, "rendering/canvas_textures/default_texture_repeat", PROPERTY_HINT_ENUM,
+							"Disable,Enable,Mirror"));
 		}
 
 #ifdef TOOLS_ENABLED
 		if (editor) {
-			bool editor_embed_subwindows = EditorSettings::get_singleton()->get_setting("interface/editor/single_window_mode");
+			bool editor_embed_subwindows = EditorSettings::get_singleton()->get_setting(
+					"interface/editor/single_window_mode");
 
 			if (editor_embed_subwindows) {
 				sml->get_root()->set_embed_subwindows_hint(true);
@@ -1973,7 +2129,8 @@ bool Main::start() {
 			local_game_path = game_path.replace("\\", "/");
 
 			if (!local_game_path.begins_with("res://")) {
-				bool absolute = (local_game_path.size() > 1) && (local_game_path[0] == '/' || local_game_path[1] == ':');
+				bool absolute =
+						(local_game_path.size() > 1) && (local_game_path[0] == '/' || local_game_path[1] == ':');
 
 				if (!absolute) {
 					if (ProjectSettings::get_singleton()->is_using_datapack()) {
@@ -1989,7 +2146,8 @@ bool Main::start() {
 						} else {
 							DirAccess *da = DirAccess::open(local_game_path.substr(0, sep));
 							if (da) {
-								local_game_path = da->get_current_dir().plus_file(local_game_path.substr(sep + 1, local_game_path.length()));
+								local_game_path = da->get_current_dir().plus_file(
+										local_game_path.substr(sep + 1, local_game_path.length()));
 								memdelete(da);
 							}
 						}
@@ -2059,7 +2217,7 @@ bool Main::start() {
 		}
 
 #ifdef TOOLS_ENABLED
-		if (project_manager || (script == "" && test == "" && game_path == "" && !editor)) {
+		if (project_manager || (script == "" && game_path == "" && !editor)) {
 			Engine::get_singleton()->set_editor_hint(true);
 			ProjectManager *pmanager = memnew(ProjectManager);
 			ProgressDialog *progress_dialog = memnew(ProgressDialog);
@@ -2072,12 +2230,16 @@ bool Main::start() {
 		if (project_manager || editor) {
 			if (DisplayServer::get_singleton()->has_feature(DisplayServer::FEATURE_CONSOLE_WINDOW)) {
 				// Hide console window if requested (Windows-only).
-				bool hide_console = EditorSettings::get_singleton()->get_setting("interface/editor/hide_console_window");
+				bool hide_console = EditorSettings::get_singleton()->get_setting(
+						"interface/editor/hide_console_window");
 				DisplayServer::get_singleton()->console_set_visible(!hide_console);
 			}
 
 			// Load SSL Certificates from Editor Settings (or builtin)
-			Crypto::load_default_certificates(EditorSettings::get_singleton()->get_setting("network/ssl/editor_ssl_certificates").operator String());
+			Crypto::load_default_certificates(EditorSettings::get_singleton()->get_setting(
+																					 "network/ssl/editor_ssl_certificates")
+													  .
+													  operator String());
 		}
 #endif
 	}
@@ -2089,7 +2251,7 @@ bool Main::start() {
 
 	OS::get_singleton()->set_main_loop(main_loop);
 
-	return true;
+	return OK;
 }
 
 /* Main iteration
@@ -2107,6 +2269,7 @@ uint32_t Main::frames = 0;
 uint32_t Main::frame = 0;
 bool Main::force_redraw_requested = false;
 int Main::iterating = 0;
+
 bool Main::is_iterating() {
 	return iterating > 0;
 }
@@ -2182,7 +2345,8 @@ bool Main::iteration() {
 
 		message_queue->flush();
 
-		physics_process_ticks = MAX(physics_process_ticks, OS::get_singleton()->get_ticks_usec() - physics_begin); // keep the largest one for reference
+		physics_process_ticks = MAX(physics_process_ticks, OS::get_singleton()->get_ticks_usec() -
+																   physics_begin); // keep the largest one for reference
 		physics_process_max = MAX(OS::get_singleton()->get_ticks_usec() - physics_begin, physics_process_max);
 		Engine::get_singleton()->_physics_frames++;
 	}
@@ -2198,7 +2362,8 @@ bool Main::iteration() {
 
 	RenderingServer::get_singleton()->sync(); //sync if still drawing from previous frames.
 
-	if (DisplayServer::get_singleton()->can_any_window_draw() && RenderingServer::get_singleton()->is_render_loop_enabled()) {
+	if (DisplayServer::get_singleton()->can_any_window_draw() &&
+			RenderingServer::get_singleton()->is_render_loop_enabled()) {
 		if ((!force_redraw_requested) && OS::get_singleton()->is_in_low_processor_usage_mode()) {
 			if (RenderingServer::get_singleton()->has_changed()) {
 				RenderingServer::get_singleton()->draw(true, scaled_step); // flush visual commands
@@ -2260,10 +2425,12 @@ bool Main::iteration() {
 		auto_build_solutions = false;
 		// Only relevant when running the editor.
 		if (!editor) {
-			ERR_FAIL_V_MSG(true, "Command line option --build-solutions was passed, but no project is being edited. Aborting.");
+			ERR_FAIL_V_MSG(true,
+					"Command line option --build-solutions was passed, but no project is being edited. Aborting.");
 		}
 		if (!EditorNode::get_singleton()->call_build()) {
-			ERR_FAIL_V_MSG(true, "Command line option --build-solutions was passed, but the build callback failed. Aborting.");
+			ERR_FAIL_V_MSG(true,
+					"Command line option --build-solutions was passed, but the build callback failed. Aborting.");
 		}
 	}
 #endif