Support bytes in os.listdir

tests/snippets/stdlib_os.py

@@ -393,6 +393,12 @@ with TestWithTempDir() as tmpdir:
 
     dir_iter_bytes.close()
 
+    collected_files = os.listdir(tmpdir)
+    assert set(collected_files) == set(expected_files)
+
+    collected_files = os.listdir(tmpdir.encode())
+    assert set(collected_files) == set([file.encode() for file in expected_files ])
+
     with TestWithTempCurrentDir():
         os.chdir(tmpdir)
         with os.scandir() as dir_iter:

vm/src/stdlib/os.rs

@@ -466,11 +466,15 @@ fn os_rmdir(path: PyStringRef, dir_fd: DirFd, vm: &VirtualMachine) -> PyResult<(
     fs::remove_dir(path).map_err(|err| convert_io_error(vm, err))
 }
 
-fn os_listdir(path: PyStringRef, vm: &VirtualMachine) -> PyResult {
-    let res: PyResult<Vec<PyObjectRef>> = fs::read_dir(path.as_str())
+fn os_listdir(path: PyPathLike, vm: &VirtualMachine) -> PyResult {
+    let res: PyResult<Vec<PyObjectRef>> = fs::read_dir(&path.path)
         .map_err(|err| convert_io_error(vm, err))?
         .map(|entry| match entry {
-            Ok(path) => Ok(vm.ctx.new_str(path.file_name().into_string().unwrap())),
+            Ok(entry_path) => Ok(output_by_mode(
+                entry_path.file_name().into_string().unwrap(),
+                path.mode,
+                vm,
+            )),
             Err(s) => Err(convert_io_error(vm, s)),
         })
         .collect();