test: replace unit tests with integration test for pop_views_until

Remove standalone unit test file and add integration test to
test_routing_navigation.py following the existing test pattern,
as suggested by @ndonkoHenri in PR review.

Author: brunobrown

sdk/python/packages/flet/integration_tests/examples/apps/test_routing_navigation.py

@@ -7,6 +7,7 @@
     home_store,
     initial_route,
     pop_view_confirm,
+    pop_views_until,
     route_change_event,
 )
 
@@ -185,3 +186,59 @@ async def test_drawer_navigation(flet_app_function: ftt.FletTestApp):
     # Verify home view
     home_text = await flet_app_function.tester.find_by_text("Welcome to Home Page")
     assert home_text.count == 1
+
+
+@pytest.mark.parametrize(
+    "flet_app_function",
+    [{"flet_app_main": pop_views_until.main}],
+    indirect=True,
+)
+@pytest.mark.asyncio(loop_scope="function")
+async def test_pop_views_until(flet_app_function: ftt.FletTestApp):
+    # Verify initial view
+    button = await flet_app_function.tester.find_by_text_containing("Start flow")
+    assert button.count == 1
+    result_text = await flet_app_function.tester.find_by_text("No result yet")
+    assert result_text.count == 1
+
+    # Navigate to Step 1
+    await flet_app_function.tester.tap(button)
+    await flet_app_function.tester.pump_and_settle()
+    step1_text = await flet_app_function.tester.find_by_text("Step 1 of the flow")
+    assert step1_text.count == 1
+
+    # Navigate to Step 2
+    step2_button = await flet_app_function.tester.find_by_text_containing(
+        "Go to Step 2"
+    )
+    assert step2_button.count == 1
+    await flet_app_function.tester.tap(step2_button)
+    await flet_app_function.tester.pump_and_settle()
+    step2_text = await flet_app_function.tester.find_by_text("Step 2 of the flow")
+    assert step2_text.count == 1
+
+    # Navigate to Step 3
+    step3_button = await flet_app_function.tester.find_by_text_containing(
+        "Go to Step 3"
+    )
+    assert step3_button.count == 1
+    await flet_app_function.tester.tap(step3_button)
+    await flet_app_function.tester.pump_and_settle()
+    final_text = await flet_app_function.tester.find_by_text("Flow complete!")
+    assert final_text.count == 1
+
+    # Click "Finish and go Home" — triggers pop_views_until
+    finish_button = await flet_app_function.tester.find_by_text_containing(
+        "Finish and go Home"
+    )
+    assert finish_button.count == 1
+    await flet_app_function.tester.tap(finish_button)
+    await flet_app_function.tester.pump_and_settle()
+
+    # Verify back at Home with result
+    result_text = await flet_app_function.tester.find_by_text("Result: Flow completed!")
+    assert result_text.count == 1
+
+    # Verify we can start the flow again
+    button = await flet_app_function.tester.find_by_text_containing("Start flow")
+    assert button.count == 1