1 files changed, 36 insertions, 0 deletions
diff --git a/testing/marionette/harness/marionette_harness/tests/unit/test_window_maximize.py b/testing/marionette/harness/marionette_harness/tests/unit/test_window_maximize.py
new file mode 100644
index 0000000000..e9c2d8ba38
--- /dev/null
+++ b/testing/marionette/harness/marionette_harness/tests/unit/test_window_maximize.py
@@ -0,0 +1,36 @@
+# 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/.
+
+from marionette_harness import MarionetteTestCase
+
+
+class TestWindowMaximize(MarionetteTestCase):
+    def setUp(self):
+        MarionetteTestCase.setUp(self)
+        self.max = self.marionette.execute_script(
+            """
+            return {
+              width: window.screen.availWidth,
+              height: window.screen.availHeight,
+            }""",
+            sandbox=None,
+        )
+
+        # ensure window is not maximized
+        self.marionette.set_window_rect(
+            width=self.max["width"] - 100, height=self.max["height"] - 100
+        )
+        actual = self.marionette.window_rect
+        self.assertNotEqual(actual["width"], self.max["width"])
+        self.assertNotEqual(actual["height"], self.max["height"])
+
+        self.original_size = actual
+
+    def tearDown(self):
+        self.marionette.set_window_rect(
+            width=self.original_size["width"], height=self.original_size["height"]
+        )
+
+    def test_maximize(self):
+        self.marionette.maximize_window()