banner test

Author: OwenMcDonnell

sdk/python/packages/flet/integration_tests/controls/golden/macos/banner/banner_0.png

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+import flet as ft
+import flet.testing as ftt
+import pytest
+
+
+@pytest.mark.asyncio(loop_scope="module")
+async def test_banner_presence(flet_app: ftt.FletTestApp, request):
+    flet_app.page.theme_mode = ft.ThemeMode.LIGHT
+
+    action_button_style = ft.ButtonStyle(color=ft.Colors.BLUE)
+
+    def handle_banner_close(e: ft.Event[ft.TextButton]):
+        flet_app.page.pop_dialog()
+        flet_app.page.add(ft.Text(f"Action clicked: {e.control.content}"))
+
+    eb = ft.ElevatedButton(
+        "Show Banner", on_click=lambda e: flet_app.page.show_dialog(banner), key="eb"
+    )
+    banner = ft.Banner(
+        key="banner",
+        bgcolor=ft.Colors.AMBER_100,
+        leading=ft.Icon(ft.Icons.WARNING_AMBER_ROUNDED, color=ft.Colors.AMBER, size=40),
+        content=ft.Text(
+            value="Oops, there were some errors while trying to delete the file. What would you like to do?",
+            color=ft.Colors.BLACK,
+        ),
+        actions=[
+            ft.TextButton(
+                content="Retry",
+                style=action_button_style,
+                on_click=handle_banner_close,
+                key="retry",
+            ),
+            ft.TextButton(
+                content="Cancel",
+                style=action_button_style,
+                on_click=handle_banner_close,
+                key="cancel",
+            ),
+        ],
+    )
+    flet_app.page.enable_screenshots = True
+    flet_app.page.window.width = 400
+    flet_app.page.window.height = 600
+    flet_app.page.controls = [eb]
+    flet_app.page.update()
+    await flet_app.tester.pump_and_settle()
+
+    await flet_app.tester.tap(await flet_app.tester.find_by_key("eb"))
+    await flet_app.tester.pump_and_settle()
+    flet_app.assert_screenshot(
+        "banner_0",
+        await flet_app.page.take_screenshot(
+            pixel_ratio=flet_app.screenshots_pixel_ratio
+        ),
+    )
+
+    await flet_app.tester.tap(await flet_app.tester.find_by_key("retry"))
+    await flet_app.tester.pump_and_settle()
+    flet_app.assert_screenshot(
+        "banner_1",
+        await flet_app.page.take_screenshot(
+            pixel_ratio=flet_app.screenshots_pixel_ratio
+        ),
+    )