Implement std::filesystem::path conversion tests.

apps/openmw_test_suite/CMakeLists.txt

@@ -75,6 +75,7 @@ file(GLOB UNITTEST_SRC_FILES
     esmloader/record.cpp
 
     files/hash.cpp
+    files/conversion_tests.cpp
 
     toutf8/toutf8.cpp
 

apps/openmw_test_suite/files/conversion_tests.cpp

@@ -0,0 +1,27 @@
+#include <components/files/conversion.hpp>
+#include <components/misc/stringops.hpp>
+
+#include <gtest/gtest.h>
+
+#include <array>
+
+namespace
+{
+    using namespace testing;
+    using namespace Files;
+
+    constexpr auto test_path_u8 = u8"./tmp/ÒĎƎɠˠΏЌԹעڨ/ऊঋਐઊଊ/ஐఋಋഊ/ฎນ༈ႩᄇḮὯ⁂₁₩ℒ/Ⅷ↝∑/☝✌〥ぐズ㌎丕.갔３갛";
+    constexpr auto test_path = "./tmp/ÒĎƎɠˠΏЌԹעڨ/ऊঋਐઊଊ/ஐఋಋഊ/ฎນ༈ႩᄇḮὯ⁂₁₩ℒ/Ⅷ↝∑/☝✌〥ぐズ㌎丕.갔３갛";
+
+    TEST(OpenMWConversion, should_support_unicode_string_to_path)
+    {
+        auto p = Files::pathFromUnicodeString(test_path);
+        EXPECT_EQ(Misc::StringUtils::u8StringToString(p.u8string()), Misc::StringUtils::u8StringToString(test_path_u8));
+    }
+
+    TEST(OpenMWConversion, should_support_path_to_unicode_string)
+    {
+        std::filesystem::path p{ test_path_u8 };
+        EXPECT_EQ(Files::pathToUnicodeString(p), test_path);
+    }
+}