Test windows file type equality

Author: ChrisDenton

library/std/src/fs/tests.rs

@@ -1719,6 +1719,23 @@ fn test_eq_direntry_metadata() {
     }
 }
 
+/// Test that windows file type equality is not affected by attributes unrelated
+/// to the file type.
+#[test]
+#[cfg(target_os = "windows")]
+fn test_eq_windows_file_type() {
+    let tmpdir = tmpdir();
+    let file1 = File::create(tmpdir.join("file1")).unwrap();
+    let file2 = File::create(tmpdir.join("file2")).unwrap();
+    assert_eq!(file1.metadata().unwrap().file_type(), file2.metadata().unwrap().file_type());
+
+    // Change the readonly attribute of one file.
+    let mut perms = file1.metadata().unwrap().permissions();
+    perms.set_readonly(true);
+    file1.set_permissions(perms).unwrap();
+    assert_eq!(file1.metadata().unwrap().file_type(), file2.metadata().unwrap().file_type());
+}
+
 /// Regression test for https://github.com/rust-lang/rust/issues/50619.
 #[test]
 #[cfg(target_os = "linux")]