Test moving E2E tests to one file

tests/e2e/test_move_task.py

@@ -1,9 +1,41 @@
-from playwright.sync_api import Page, expect
+from playwright.sync_api import Cookie, Page, expect
 
 from tests.constants import all_statusses, default_task
 from tests.database_test_utils import DatabaseTestUtils
 
 
+def test_change_language(browser: Page) -> Cookie | None:
+    # TODO: (Christopher) figure out what we want to do with
+    # pyright complaining about accessing dict values, which
+    # we ingnore now.
+    def get_lang_cookie(browser: Page):
+        for cookie in browser.context.cookies():
+            if cookie["name"] == "lang":  # type: ignore
+                return cookie
+        return None
+
+    browser.goto("/pages/")
+
+    # Upon opening make sure no cookie is set.
+    lang_cookie = get_lang_cookie(browser)
+    assert lang_cookie is None
+
+    browser.click("#langselect-nl")
+    expect(browser.locator("#langselect-nl.selected")).to_be_visible()
+    lang_cookie = get_lang_cookie(browser)
+    assert lang_cookie["value"] == "nl"  # type: ignore
+
+    browser.click("#langselect-fy")
+    expect(browser.locator("#langselect-fy.selected")).to_be_visible()
+    lang_cookie = get_lang_cookie(browser)
+    assert lang_cookie["value"] == "fy"  # type: ignore
+
+    browser.click("#langselect-en")
+    expect(browser.locator("#langselect-en.selected")).to_be_visible()
+    lang_cookie = get_lang_cookie(browser)
+    assert lang_cookie["value"] == "en"  # type: ignore
+
+
 def test_move_task_to_column(browser: Page, db: DatabaseTestUtils) -> None:
     """
     Test moving a task in the browser to another column and verify that after a reload