From a5073a6ddf83fb88fcbca7dbdc1190174b703308 Mon Sep 17 00:00:00 2001
From: Maurice Heumann <mauriceheumann@gmail.com>
Date: Tue, 18 Mar 2025 08:33:14 +0100
Subject: [PATCH] Add path traversal unit test

---
 src/windows-emulator-test/file_system_test.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/windows-emulator-test/file_system_test.cpp

diff --git a/src/windows-emulator-test/file_system_test.cpp b/src/windows-emulator-test/file_system_test.cpp
new file mode 100644
index 00000000..8487395f
--- /dev/null
+++ b/src/windows-emulator-test/file_system_test.cpp
@@ -0,0 +1,17 @@
+#include <gtest/gtest.h>
+
+#include <file_system.hpp>
+
+namespace test
+{
+    TEST(FileSystemTest, PathTraversalIsNotPossible)
+    {
+        const auto current_dir = std::filesystem::current_path();
+
+        const file_system fs{current_dir};
+
+        EXPECT_EQ(current_dir / "a", fs.translate(windows_path('a', {u"..", u"..", u"..", u"..", u"a.txt"})));
+        EXPECT_EQ(current_dir / "a", fs.translate(windows_path('a', {u"b", u"..", u"..", u"b", u"..", u"a.txt"})));
+        EXPECT_EQ(current_dir / "a", fs.translate(windows_path('a', {u"..", u"b"})));
+    }
+}