1 files changed, 45 insertions, 0 deletions
diff --git a/widget/headless/tests/test_headless_clipboard.js b/widget/headless/tests/test_headless_clipboard.js
new file mode 100644
index 0000000000..862e343001
--- /dev/null
+++ b/widget/headless/tests/test_headless_clipboard.js
@@ -0,0 +1,45 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+function getString(clipboard) {
+  var str = "";
+
+  // Create transferable that will transfer the text.
+  var trans = Cc["@mozilla.org/widget/transferable;1"].createInstance(
+    Ci.nsITransferable
+  );
+  trans.init(null);
+  trans.addDataFlavor("text/plain");
+
+  clipboard.getData(trans, Ci.nsIClipboard.kGlobalClipboard);
+
+  try {
+    var data = {};
+    trans.getTransferData("text/plain", data);
+
+    if (data) {
+      data = data.value.QueryInterface(Ci.nsISupportsString);
+      str = data.data;
+    }
+  } catch (ex) {
+    // If the clipboard is empty getTransferData will throw.
+  }
+
+  return str;
+}
+
+add_task(async function test_clipboard() {
+  let clipboard = Services.clipboard;
+
+  // Test copy.
+  const data = "random number: " + Math.random();
+  let helper = Cc["@mozilla.org/widget/clipboardhelper;1"].getService(
+    Ci.nsIClipboardHelper
+  );
+  helper.copyString(data);
+  equal(getString(clipboard), data, "Data was successfully copied.");
+
+  clipboard.emptyClipboard(Ci.nsIClipboard.kGlobalClipboard);
+  equal(getString(clipboard), "", "Data was successfully cleared.");
+});