1 files changed, 93 insertions, 0 deletions
diff --git a/dom/ipc/tests/browser_child_clipboard_restricted.js b/dom/ipc/tests/browser_child_clipboard_restricted.js
new file mode 100644
index 0000000000..be2d1bca9c
--- /dev/null
+++ b/dom/ipc/tests/browser_child_clipboard_restricted.js
@@ -0,0 +1,93 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+add_task(async function () {
+  // Create a new content tab to make sure the paste is cross-process.
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "data:text/html,<br>"
+  );
+  let browser = tab.linkedBrowser;
+
+  await SpecialPowers.spawn(browser, [], async function (arg) {
+    const trans = Cc["@mozilla.org/widget/transferable;1"].createInstance(
+      Ci.nsITransferable
+    );
+    trans.init(null);
+
+    const string = Cc["@mozilla.org/supports-string;1"].createInstance(
+      Ci.nsISupportsString
+    );
+    string.data = "blablabla";
+
+    trans.addDataFlavor("text/unknown");
+    trans.setTransferData("text/unknown", string);
+
+    trans.addDataFlavor("text/plain");
+    trans.setTransferData("text/plain", string);
+
+    // Write to clipboard.
+    Services.clipboard.setData(trans, null, Ci.nsIClipboard.kGlobalClipboard);
+  });
+
+  // Wait for known.
+  for (var i = 0; i < 20; i++) {
+    if (
+      Services.clipboard.hasDataMatchingFlavors(
+        ["text/plain"],
+        Services.clipboard.kGlobalClipboard
+      )
+    ) {
+      break;
+    }
+  }
+
+  function readClipboard(flavor) {
+    const trans = Cc["@mozilla.org/widget/transferable;1"].createInstance(
+      Ci.nsITransferable
+    );
+    trans.init(null);
+    trans.addDataFlavor(flavor);
+    Services.clipboard.getData(
+      trans,
+      Services.clipboard.kGlobalClipboard,
+      SpecialPowers.wrap(window).browsingContext.currentWindowContext
+    );
+
+    let data = {};
+    trans.getTransferData(flavor, data);
+    return data.value.QueryInterface(Ci.nsISupportsString).data;
+  }
+
+  ok(
+    Services.clipboard.hasDataMatchingFlavors(
+      ["text/plain"],
+      Services.clipboard.kGlobalClipboard
+    ),
+    "clipboard should have text/plain"
+  );
+
+  is(
+    readClipboard("text/plain"),
+    "blablabla",
+    "matching string for text/plain"
+  );
+
+  ok(
+    !Services.clipboard.hasDataMatchingFlavors(
+      ["text/unknown"],
+      Services.clipboard.kGlobalClipboard
+    ),
+    "clipboard should not have text/unknown"
+  );
+
+  let error = undefined;
+  try {
+    readClipboard("text/unknown");
+  } catch (e) {
+    error = e;
+  }
+  is(typeof error, "object", "reading text/unknown should fail");
+
+  BrowserTestUtils.removeTab(tab);
+});