0ad/source/lib/sysdep/tests/test_sysdep.h

/* Copyright (C) 2009 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "lib/self_test.h"

#include "lib/lib.h"
#include "lib/sysdep/sysdep.h"
#include "lib/posix/posix.h"	// fminf etc.

#if OS_LINUX
# include "mocks/dlfcn.h"
# include "mocks/boost_filesystem.h"
#endif

#include <cxxtest/PsTestWrapper.h>

class TestSysdep : public CxxTest::TestSuite 
{
public:
	void test_float_int()
	{
		TS_ASSERT_EQUALS(cpu_i32FromFloat(0.99999f), 0);
		TS_ASSERT_EQUALS(cpu_i32FromFloat(1.0f), 1);
		TS_ASSERT_EQUALS(cpu_i32FromFloat(1.01f), 1);
		TS_ASSERT_EQUALS(cpu_i32FromFloat(5.6f), 5);

		TS_ASSERT_EQUALS(cpu_i32FromDouble(0.99999), 0);
		TS_ASSERT_EQUALS(cpu_i32FromDouble(1.0), 1);
		TS_ASSERT_EQUALS(cpu_i32FromDouble(1.01), 1);
		TS_ASSERT_EQUALS(cpu_i32FromDouble(5.6), 5);

		TS_ASSERT_EQUALS(cpu_i64FromDouble(0.99999), 0LL);
		TS_ASSERT_EQUALS(cpu_i64FromDouble(1.0), 1LL);
		TS_ASSERT_EQUALS(cpu_i64FromDouble(1.01), 1LL);
		TS_ASSERT_EQUALS(cpu_i64FromDouble(5.6), 5LL);
	}

	void test_round()
	{
		TS_ASSERT_EQUALS(rintf(0.99999f), 1.0f);
		TS_ASSERT_EQUALS(rintf(1.0f), 1.0f);
		TS_ASSERT_EQUALS(rintf(1.01f), 1.0f);
		TS_ASSERT_EQUALS(rintf(5.6f), 6.0f);

		TS_ASSERT_EQUALS(rint(0.99999), 1.0);
		TS_ASSERT_EQUALS(rint(1.0), 1.0);
		TS_ASSERT_EQUALS(rint(1.01), 1.0);
		TS_ASSERT_EQUALS(rint(5.6), 6.0);
	}

	void test_min_max()
	{
		TS_ASSERT_EQUALS(fminf(0.0f, 10000.0f), 0.0f);
		TS_ASSERT_EQUALS(fminf(100.0f, 10000.0f), 100.0f);
		TS_ASSERT_EQUALS(fminf(-1.0f, 2.0f), -1.0f);
		TS_ASSERT_EQUALS(fminf(-2.0f, 1.0f), -2.0f);
		TS_ASSERT_EQUALS(fminf(0.001f, 0.00001f), 0.00001f);

		TS_ASSERT_EQUALS(fmaxf(0.0f, 10000.0f), 10000.0f);
		TS_ASSERT_EQUALS(fmaxf(100.0f, 10000.0f), 10000.0f);
		TS_ASSERT_EQUALS(fmaxf(-1.0f, 2.0f), 2.0f);
		TS_ASSERT_EQUALS(fmaxf(-2.0f, 1.0f), 1.0f);
		TS_ASSERT_EQUALS(fmaxf(0.001f, 0.00001f), 0.001f);
	}

	void test_sys_get_executable_name()
	{
		char path[PATH_MAX] = "";

		// Try it first with the real executable (i.e. the
		// one that's running this test code)
		TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), INFO::OK);
		// Check it's absolute
		TSM_ASSERT(std::string("Path: ")+path, path_is_absolute(path));
		// Check the file exists
		struct stat s;
		TSM_ASSERT_EQUALS(std::string("Path: ")+path, stat(path, &s), 0);

		// Do some platform-specific tests, based on the
		// implementations of sys_get_executable_name:

#if OS_LINUX
		// Try with absolute paths
		{
			Mock_dladdr d("/example/executable");
			TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), INFO::OK);
			TS_ASSERT_STR_EQUALS(path, "/example/executable");
		}
		{
			Mock_dladdr d("/example/./a/b/../c/../../executable");
			TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), INFO::OK);
			TS_ASSERT_STR_EQUALS(path, "/example/executable");
		}

		// Try with relative paths
		{
			Mock_dladdr d("./executable");
			Mock_initial_path m("/example");
			TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), INFO::OK);
			TS_ASSERT_STR_EQUALS(path, "/example/executable");
		}
		{
			Mock_dladdr d("./executable");
			Mock_initial_path m("/example/");
			TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), INFO::OK);
			TS_ASSERT_STR_EQUALS(path, "/example/executable");
		}
		{
			Mock_dladdr d("../d/../../e/executable");
			Mock_initial_path m("/example/a/b/c");
			TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), INFO::OK);
			TS_ASSERT_STR_EQUALS(path, "/example/a/e/executable");
		}

		// Try with pathless names
		{
			Mock_dladdr d("executable");
			TS_ASSERT_EQUALS(sys_get_executable_name(path, PATH_MAX), ERR::NO_SYS);
		}
#endif // OS_LINUX
	}

	// Mock classes for test_sys_get_executable_name
#if OS_LINUX
	class Mock_dladdr : public T::Base_dladdr
	{
	public:
		Mock_dladdr(const char* fname) : fname_(fname) { }
		int dladdr(void *UNUSED(addr), Dl_info *info) {
			info->dli_fname = fname_;
			return 1;
		}
	private:
		const char* fname_;
	};

	class Mock_initial_path : public T::Base_Boost_Filesystem_initial_path
	{
	public:
		Mock_initial_path(const char* buf) : buf_(buf) { }
		fs::path Boost_Filesystem_initial_path() {
			return fs::path(buf_);
		}
	private:
		const char* buf_;
	};
#endif

private:
	bool path_is_absolute(const char* path)
	{
		// UNIX-style absolute paths
		if (path[0] == '/')
			return true;

		// Windows UNC absolute paths
		if (path[0] == '\\' && path[1] == '\\')
			return true;

		// Windows drive-letter absolute paths
		if (isalpha(path[0]) && path[1] == ':' && (path[2] == '/' || path[2] == '\\'))
			return true;

		return false;
	}

};