1 files changed, 93 insertions, 0 deletions
diff --git a/dom/broadcastchannel/tests/browser_private_browsing.js b/dom/broadcastchannel/tests/browser_private_browsing.js
new file mode 100644
index 0000000000..42d90d77ab
--- /dev/null
+++ b/dom/broadcastchannel/tests/browser_private_browsing.js
@@ -0,0 +1,93 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const URL =
+  "http://mochi.test:8888/browser/dom/broadcastchannel/tests/blank.html";
+
+add_task(async function() {
+  var win1 = OpenBrowserWindow({ private: true });
+  var win1Promise = new win1.Promise(resolve => {
+    win1.addEventListener(
+      "load",
+      function() {
+        resolve();
+      },
+      { once: true }
+    );
+  });
+  await win1Promise;
+
+  var win2 = OpenBrowserWindow({ private: false });
+  var win2Promise = new win2.Promise(resolve => {
+    win2.addEventListener(
+      "load",
+      function() {
+        resolve();
+      },
+      { once: true }
+    );
+  });
+  await win2Promise;
+
+  var tab1 = BrowserTestUtils.addTab(win1.gBrowser, URL);
+  await BrowserTestUtils.browserLoaded(win1.gBrowser.getBrowserForTab(tab1));
+  var browser1 = gBrowser.getBrowserForTab(tab1);
+
+  var tab2 = BrowserTestUtils.addTab(win2.gBrowser, URL);
+  await BrowserTestUtils.browserLoaded(win2.gBrowser.getBrowserForTab(tab2));
+  var browser2 = gBrowser.getBrowserForTab(tab2);
+
+  var p1 = SpecialPowers.spawn(browser1, [], function(opts) {
+    return new content.window.Promise(resolve => {
+      content.window.bc = new content.window.BroadcastChannel("foobar");
+      content.window.bc.onmessage = function(e) {
+        resolve(e.data);
+      };
+    });
+  });
+
+  var p2 = SpecialPowers.spawn(browser2, [], function(opts) {
+    return new content.window.Promise(resolve => {
+      content.window.bc = new content.window.BroadcastChannel("foobar");
+      content.window.bc.onmessage = function(e) {
+        resolve(e.data);
+      };
+    });
+  });
+
+  await SpecialPowers.spawn(browser1, [], function(opts) {
+    return new content.window.Promise(resolve => {
+      var bc = new content.window.BroadcastChannel("foobar");
+      bc.postMessage("hello world from private browsing");
+      resolve();
+    });
+  });
+
+  await SpecialPowers.spawn(browser2, [], function(opts) {
+    return new content.window.Promise(resolve => {
+      var bc = new content.window.BroadcastChannel("foobar");
+      bc.postMessage("hello world from non private browsing");
+      resolve();
+    });
+  });
+
+  var what1 = await p1;
+  is(
+    what1,
+    "hello world from private browsing",
+    "No messages received from the other window."
+  );
+
+  var what2 = await p2;
+  is(
+    what2,
+    "hello world from non private browsing",
+    "No messages received from the other window."
+  );
+
+  BrowserTestUtils.removeTab(tab1);
+  await BrowserTestUtils.closeWindow(win1);
+
+  BrowserTestUtils.removeTab(tab2);
+  await BrowserTestUtils.closeWindow(win2);
+});