1 files changed, 25 insertions, 0 deletions
diff --git a/dom/base/test/bug403852_fileOpener.js b/dom/base/test/bug403852_fileOpener.js
new file mode 100644
index 0000000000..d3366cfe0c
--- /dev/null
+++ b/dom/base/test/bug403852_fileOpener.js
@@ -0,0 +1,25 @@
+/* eslint-env mozilla/chrome-script */
+
+// eslint-disable-next-line mozilla/reject-importGlobalProperties
+Cu.importGlobalProperties(["File"]);
+
+var testFile = Cc["@mozilla.org/file/directory_service;1"]
+  .getService(Ci.nsIDirectoryService)
+  .QueryInterface(Ci.nsIProperties)
+  .get("ProfD", Ci.nsIFile);
+testFile.append("prefs.js");
+
+addMessageListener("file.open", function () {
+  File.createFromNsIFile(testFile).then(function (file) {
+    File.createFromNsIFile(testFile, { lastModified: 123 }).then(function (
+      fileWithDate
+    ) {
+      sendAsyncMessage("file.opened", {
+        file,
+        mtime: testFile.lastModifiedTime,
+        fileWithDate,
+        fileDate: 123,
+      });
+    });
+  });
+});