1 files changed, 42 insertions, 0 deletions
diff --git a/dom/workers/test/script_createFile.js b/dom/workers/test/script_createFile.js
new file mode 100644
index 0000000000..7df83237bd
--- /dev/null
+++ b/dom/workers/test/script_createFile.js
@@ -0,0 +1,42 @@
+/* eslint-env mozilla/chrome-script */
+
+Cu.importGlobalProperties(["File"]);
+
+addMessageListener("file.open", function(e) {
+  var tmpFile = Cc["@mozilla.org/file/directory_service;1"]
+    .getService(Ci.nsIDirectoryService)
+    .QueryInterface(Ci.nsIProperties)
+    .get("TmpD", Ci.nsIFile);
+  tmpFile.append("file.txt");
+  tmpFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
+
+  File.createFromNsIFile(tmpFile).then(function(file) {
+    sendAsyncMessage("file.opened", { data: file });
+  });
+});
+
+addMessageListener("nonEmptyFile.open", function(e) {
+  var tmpFile = Cc["@mozilla.org/file/directory_service;1"]
+    .getService(Ci.nsIDirectoryService)
+    .QueryInterface(Ci.nsIProperties)
+    .get("TmpD", Ci.nsIFile);
+  tmpFile.append("file.txt");
+  tmpFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
+
+  var outStream = Cc[
+    "@mozilla.org/network/file-output-stream;1"
+  ].createInstance(Ci.nsIFileOutputStream);
+  outStream.init(
+    tmpFile,
+    0x02 | 0x08 | 0x20, // write, create, truncate
+    0o666,
+    0
+  );
+  var fileData = "Hello world!";
+  outStream.write(fileData, fileData.length);
+  outStream.close();
+
+  File.createFromNsIFile(tmpFile).then(function(file) {
+    sendAsyncMessage("nonEmptyFile.opened", { data: file });
+  });
+});