1 files changed, 28 insertions, 0 deletions
diff --git a/xpcom/tests/unit/test_hidden_files.js b/xpcom/tests/unit/test_hidden_files.js
new file mode 100644
index 0000000000..3383ba11b2
--- /dev/null
+++ b/xpcom/tests/unit/test_hidden_files.js
@@ -0,0 +1,28 @@
+var Ci = Components.interfaces;
+var Cc = Components.classes;
+const NS_OS_TEMP_DIR = "TmpD";
+
+const CWD = do_get_cwd();
+
+var hiddenUnixFile;
+function createUNIXHiddenFile() {
+  var dirSvc = Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties);
+  var tmpDir = dirSvc.get(NS_OS_TEMP_DIR, Ci.nsIFile);
+  hiddenUnixFile = tmpDir.clone();
+  hiddenUnixFile.append(".foo");
+  // we don't care if this already exists because we don't care
+  // about the file's contents (just the name)
+  if (!hiddenUnixFile.exists())
+    hiddenUnixFile.create(Ci.nsIFile.NORMAL_FILE_TYPE, 0o666);
+  return hiddenUnixFile.exists();
+}
+
+function run_test() {
+  // Skip this test on Windows
+  if (mozinfo.os == "win")
+    return;
+
+  do_check_true(createUNIXHiddenFile());
+  do_check_true(hiddenUnixFile.isHidden());
+}
+