Set user_agent in playwright tests.

Author: sarahboyce

djangoproject/tests.py

@@ -232,9 +232,12 @@ def tearDownClass(cls):
 
     def setUp(self):
         self.setUpTestData()
+        self.mac_user_agent = "Mozilla/5.0 (Macintosh) AppleWebKit"
+        self.windows_user_agent = "Mozilla/5.0 (Windows NT 10.0)"
+        self.mobile_linux_user_agent = "Mozilla/5.0 (Linux; Android 10; Mobile)"
 
     def test_search_ctrl_k_hotkey_desktop(self):
-        page = self.browser.new_page()
+        page = self.browser.new_page(user_agent=self.windows_user_agent)
         page.goto(self.live_server_url)
 
         mobile_search_bar = page.locator("#id_mobile-q")
@@ -251,7 +254,10 @@ def test_search_ctrl_k_hotkey_desktop(self):
         page.close()
 
     def test_search_ctrl_k_hotkey_mobile(self):
-        page = self.browser.new_page(viewport={"width": 375, "height": 812})
+        page = self.browser.new_page(
+            user_agent=self.mobile_linux_user_agent,
+            viewport={"width": 375, "height": 812},
+        )
         page.goto(self.live_server_url)
 
         mobile_search_bar = page.locator("#id_mobile-q")
@@ -268,7 +274,7 @@ def test_search_ctrl_k_hotkey_mobile(self):
         page.close()
 
     def test_search_placeholder_mac_mode(self):
-        page = self.browser.new_page(user_agent="Mozilla/5.0 (Macintosh) AppleWebKit")
+        page = self.browser.new_page(user_agent=self.mac_user_agent)
         page.goto(self.live_server_url)
 
         desktop_search_bar = page.locator("#id_desktop-q")