Added test project for vfs

- Added test case for: decode_fat_timestamp
- Changed location of: decode_fat_timestamp

src/xenia/vfs/testing/premake5.lua

@@ -0,0 +1,8 @@
+project_root = "../../../.."
+include(project_root.."/tools/build")
+
+test_suite("xenia-vfs-tests", project_root, ".", {
+  links = {
+    "xenia-vfs",
+  },
+})

src/xenia/vfs/testing/vfs_test.cc

@@ -0,0 +1,28 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2023 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include "xenia/vfs/devices/stfs_xbox.h"
+
+#include "third_party/catch/include/catch.hpp"
+
+namespace xe::vfs::test {
+
+TEST_CASE("STFS Decode date and time", "[stfs_decode]") {
+  SECTION("10 June 2022 19:46:00 UTC - Decode") {
+    const uint16_t date = 0x54CA;
+    const uint16_t time = 0x9DBD;
+    const uint64_t result = 132993639580000000;
+
+    const uint64_t timestamp = decode_fat_timestamp(date, time);
+
+    REQUIRE(timestamp == result);
+  }
+}
+
+}  // namespace xe::vfs::test