Ajout du GUI

kivy/tests/test_screen.py

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+import pytest
+
+transition_cls_names = (
+    'ShaderTransition', 'SlideTransition', 'SwapTransition', 'FadeTransition',
+    'WipeTransition', 'FallOutTransition', 'RiseInTransition', 'NoTransition',
+    'CardTransition',
+)
+
+
+def test_switch_to():
+    import kivy.uix.screenmanager as sm
+    manager = sm.ScreenManager()
+    screen1 = sm.Screen(name='first')
+    screen2 = sm.Screen(name='second')
+    manager.switch_to(screen1)
+    manager.switch_to(screen2)
+    manager.switch_to(screen1)
+    manager.switch_to(screen2)
+    manager.current = 'first'
+    manager.switch_to(screen1)
+    manager.current = 'second'
+    manager.switch_to(screen2)
+
+
+@pytest.mark.parametrize('transition_cls_name', transition_cls_names)
+def test_switching_does_not_affect_a_list_of_screens(transition_cls_name):
+    import kivy.uix.screenmanager as sm
+    transition_cls = getattr(sm, transition_cls_name)
+    scrmgr = sm.ScreenManager()
+    for i in range(3):
+        scrmgr.add_widget(sm.Screen(name=str(i)))
+    names = list(scrmgr.screen_names)
+    scrmgr.transition = transition_cls()
+    scrmgr.current = '1'
+    assert names == scrmgr.screen_names
+    scrmgr.transition = transition_cls()
+    scrmgr.current = '2'
+    assert names == scrmgr.screen_names