Add a test suite for OS

2 files changed, 159 insertions, 0 deletions

diff --git a/tests/core/os/test_os.h b/tests/core/os/test_os.h
new file mode 100644
index 0000000000..c46da5e156
--- /dev/null
+++ b/tests/core/os/test_os.h
@@ -0,0 +1,158 @@
+/*************************************************************************/
+/*  test_os.h                                                            */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef TEST_OS_H
+#define TEST_OS_H
+
+#include "core/os/os.h"
+
+#include "thirdparty/doctest/doctest.h"
+
+namespace TestOS {
+
+TEST_CASE("[OS] Environment variables") {
+#ifdef WINDOWS_ENABLED
+	CHECK_MESSAGE(
+			OS::get_singleton()->has_environment("USERPROFILE"),
+			"The USERPROFILE environment variable should be present.");
+#else
+	CHECK_MESSAGE(
+			OS::get_singleton()->has_environment("HOME"),
+			"The HOME environment variable should be present.");
+#endif
+
+	OS::get_singleton()->set_environment("HELLO", "world");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_environment("HELLO") == "world",
+			"The previously-set HELLO environment variable should return the expected value.");
+}
+
+TEST_CASE("[OS] Command line arguments") {
+	List<String> arguments = OS::get_singleton()->get_cmdline_args();
+	bool found = false;
+	for (int i = 0; i < arguments.size(); i++) {
+		if (arguments[i] == "--test") {
+			found = true;
+			break;
+		}
+	}
+	CHECK_MESSAGE(
+			found,
+			"The `--test` option must be present in the list of command line arguments.");
+}
+
+TEST_CASE("[OS] Executable and data paths") {
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_executable_path().is_absolute_path(),
+			"The executable path returned should be an absolute path.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_data_path().is_absolute_path(),
+			"The user data path returned should be an absolute path.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_config_path().is_absolute_path(),
+			"The user configuration path returned should be an absolute path.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_cache_path().is_absolute_path(),
+			"The cache path returned should be an absolute path.");
+}
+
+TEST_CASE("[OS] Ticks") {
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_ticks_usec() > 1000,
+			"The returned ticks (in microseconds) must be greater than 1,000.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_ticks_msec() > 1,
+			"The returned ticks (in milliseconds) must be greater than 1.");
+}
+
+TEST_CASE("[OS] Feature tags") {
+	CHECK_MESSAGE(
+			OS::get_singleton()->has_feature("editor"),
+			"The binary has the \"editor\" feature tag.");
+	CHECK_MESSAGE(
+			!OS::get_singleton()->has_feature("standalone"),
+			"The binary does not have the \"standalone\" feature tag.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->has_feature("debug"),
+			"The binary has the \"debug\" feature tag.");
+	CHECK_MESSAGE(
+			!OS::get_singleton()->has_feature("release"),
+			"The binary does not have the \"release\" feature tag.");
+}
+
+TEST_CASE("[OS] Process ID") {
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_process_id() >= 1,
+			"The returned process ID should be greater than zero.");
+}
+
+TEST_CASE("[OS] Processor count and memory information") {
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_processor_count() >= 1,
+			"The returned processor count should be greater than zero.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_static_memory_usage() >= 1,
+			"The returned static memory usage should be greater than zero.");
+	CHECK_MESSAGE(
+			OS::get_singleton()->get_static_memory_peak_usage() >= 1,
+			"The returned static memory peak usage should be greater than zero.");
+}
+
+TEST_CASE("[OS] Execute") {
+#ifdef WINDOWS_ENABLED
+	List<String> arguments;
+	arguments.push_back("/C");
+	arguments.push_back("dir > NUL");
+	int exit_code;
+	const Error err = OS::get_singleton()->execute("cmd", arguments, nullptr, &exit_code);
+	CHECK_MESSAGE(
+			err == OK,
+			"(Running the command `cmd /C \"dir > NUL\"` returns the expected Godot error code (OK).");
+	CHECK_MESSAGE(
+			exit_code == 0,
+			"Running the command `cmd /C \"dir > NUL\"` returns a zero (successful) exit code.");
+#else
+	List<String> arguments;
+	arguments.push_back("-c");
+	arguments.push_back("ls > /dev/null");
+	int exit_code;
+	const Error err = OS::get_singleton()->execute("sh", arguments, nullptr, &exit_code);
+	CHECK_MESSAGE(
+			err == OK,
+			"(Running the command `sh -c \"ls > /dev/null\"` returns the expected Godot error code (OK).");
+	CHECK_MESSAGE(
+			exit_code == 0,
+			"Running the command `sh -c \"ls > /dev/null\"` returns a zero (successful) exit code.");
+#endif
+}
+
+} // namespace TestOS
+
+#endif // TEST_OS_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index 13cbc7f8aa..40fe562be1 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -56,6 +56,7 @@
 #include "tests/core/object/test_class_db.h"
 #include "tests/core/object/test_method_bind.h"
 #include "tests/core/object/test_object.h"
+#include "tests/core/os/test_os.h"
 #include "tests/core/string/test_node_path.h"
 #include "tests/core/string/test_string.h"
 #include "tests/core/string/test_translation.h"