vercel · anthonyshew · Nov 19, 2025 · Nov 18, 2025 · Nov 18, 2025 · Nov 18, 2025
@@ -1143,6 +1143,106 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn test_unicode_filenames_in_changed_files() -> Result<(), Error> {
+        let (repo_root, repo) = setup_repository(None)?;
+        let root = AbsoluteSystemPathBuf::try_from(repo_root.path()).unwrap();
+
+        // Test various Unicode filenames that should be properly handled with -z flag
+        let test_files = vec![
+            "测试文件.txt",      // Chinese
+            "テストファイル.js", // Japanese
+            "файл.rs",           // Cyrillic
+            "file with spaces.txt",
+            "emoji_🚀.md",
+            "café.ts",  // Latin with diacritics
+            "ñoño.jsx", // Spanish with tildes
+            "αβγ.py",   // Greek
+        ];
+
+        // Create initial commit with a base file
+        let base_file = root.join_component("base.txt");
+        base_file.create_with_contents("base content")?;
+        let first_commit_oid = commit_file(&repo, Path::new("base.txt"), None);
+
+        // Create and commit all Unicode files
+        for filename in &test_files {
+            let file_path = root.join_component(filename);
+            file_path.create_with_contents(format!("content for {}", filename))?;
+        }
+
+        // Get changed files with uncommitted Unicode files
+        let scm = SCM::new(&root);
+        let files = scm
+            .changed_files(&root, Some("HEAD"), None, true, false, false)?
+            .unwrap();
+
+        // Verify all Unicode files are detected in uncommitted changes
+        for filename in &test_files {
+            assert!(
+                files.iter().any(|f| f.to_string().contains(filename)),
+                "Failed to detect uncommitted Unicode file: {}",
+                filename
+            );
+        }
+
+        // Commit all Unicode files
+        let mut last_commit = first_commit_oid;
+        for filename in &test_files {
+            last_commit = commit_file(&repo, Path::new(filename), Some(last_commit));
+        }
+
+        // Test committed Unicode files in range
+        let files = changed_files(
+            repo_root.path().to_path_buf(),
+            repo_root.path().to_path_buf(),
+            Some(first_commit_oid.to_string().as_str()),
+            Some("HEAD"),
+            false,
+        )?;
+
+        // Verify all Unicode files are detected in commit range
+        for filename in &test_files {
+            assert!(
+                files.iter().any(|f| f.contains(filename)),
+                "Failed to detect committed Unicode file: {}",
+                filename
+            );
+        }
+
+        // Test modification of Unicode files
+        let modified_file = "测试文件.txt";
+        let file_path = root.join_component(modified_file);
+        file_path.create_with_contents("modified content")?;
+
+        let files = scm
+            .changed_files(&root, Some("HEAD"), None, true, false, false)?
+            .unwrap();
+
+        assert!(
+            files.iter().any(|f| f.to_string().contains(modified_file)),
+            "Failed to detect modified Unicode file: {}",
+            modified_file
+        );
+
+        // Test deletion of Unicode files
+        let delete_file = "emoji_🚀.md";
+        let file_path = root.join_component(delete_file);
+        std::fs::remove_file(file_path.as_std_path())?;
+
+        let files = scm
+            .changed_files(&root, Some("HEAD"), None, true, false, false)?
+            .unwrap();
+
+        assert!(
+            files.iter().any(|f| f.to_string().contains(delete_file)),
+            "Failed to detect deleted Unicode file: {}",
+            delete_file
+        );
+
+        Ok(())
+    }
+
     struct TestCase {
         env: CIEnv,
         event_json: &'static str,