1 files changed, 62 insertions, 0 deletions
diff --git a/browser/components/resistfingerprinting/test/browser/browser_roundedWindow_newWindow.js b/browser/components/resistfingerprinting/test/browser/browser_roundedWindow_newWindow.js
new file mode 100644
index 0000000000..ea22c7fa20
--- /dev/null
+++ b/browser/components/resistfingerprinting/test/browser/browser_roundedWindow_newWindow.js
@@ -0,0 +1,62 @@
+/*
+ * Bug 1330882 - A test case for opening new windows as rounded size when
+ *   fingerprinting resistance is enabled.
+ */
+
+const CC = Components.Constructor;
+
+let gMaxAvailWidth;
+let gMaxAvailHeight;
+
+add_setup(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.resistFingerprinting", true]],
+  });
+
+  // Calculate the maximum available size.
+  let maxAvailSize = await calcMaximumAvailSize();
+
+  gMaxAvailWidth = maxAvailSize.maxAvailWidth;
+  gMaxAvailHeight = maxAvailSize.maxAvailHeight;
+});
+
+add_task(async function test_new_window() {
+  // Open a new window.
+  let win = await BrowserTestUtils.openNewBrowserWindow();
+
+  // Load a page and verify its window size.
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    win.gBrowser,
+    TEST_PATH + "file_dummy.html"
+  );
+
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [{ gMaxAvailWidth, gMaxAvailHeight }],
+    async function (input) {
+      is(
+        content.screen.width,
+        input.gMaxAvailWidth,
+        "The screen.width has a correct rounded value"
+      );
+      is(
+        content.screen.height,
+        input.gMaxAvailHeight,
+        "The screen.height has a correct rounded value"
+      );
+      is(
+        content.innerWidth,
+        input.gMaxAvailWidth,
+        "The window.innerWidth has a correct rounded value"
+      );
+      is(
+        content.innerHeight,
+        input.gMaxAvailHeight,
+        "The window.innerHeight has a correct rounded value"
+      );
+    }
+  );
+
+  BrowserTestUtils.removeTab(tab);
+  await BrowserTestUtils.closeWindow(win);
+});