1 files changed, 33 insertions, 0 deletions
diff --git a/dom/base/test/script_bug1238440.js b/dom/base/test/script_bug1238440.js
new file mode 100644
index 0000000000..1fc8422940
--- /dev/null
+++ b/dom/base/test/script_bug1238440.js
@@ -0,0 +1,33 @@
+/* eslint-env mozilla/chrome-script */
+
+Cu.importGlobalProperties(["File"]);
+
+var tmpFile;
+
+function writeFile(text, answer) {
+  var stream = Cc["@mozilla.org/network/file-output-stream;1"].createInstance(
+    Ci.nsIFileOutputStream
+  );
+  stream.init(tmpFile, 0x02 | 0x08 | 0x10, 0o600, 0);
+  stream.write(text, text.length);
+  stream.close();
+
+  File.createFromNsIFile(tmpFile).then(function (file) {
+    sendAsyncMessage(answer, { file });
+  });
+}
+
+addMessageListener("file.open", function (e) {
+  tmpFile = Cc["@mozilla.org/file/directory_service;1"]
+    .getService(Ci.nsIDirectoryService)
+    .QueryInterface(Ci.nsIProperties)
+    .get("TmpD", Ci.nsIFile);
+  tmpFile.append("foo.txt");
+  tmpFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
+
+  writeFile("hello world", "file.opened");
+});
+
+addMessageListener("file.change", function (e) {
+  writeFile("hello world---------------", "file.changed");
+});