added simple test for basic usage ConfirmationDialog

tests/unit/confirmation_dialog_test.py

@@ -0,0 +1,18 @@
+from unittest.mock import MagicMock
+
+import ipyvuetify as vw
+
+import solara
+from solara.lab.components.confirmation_dialog import ConfirmationDialog
+
+
+def test_confirmation_dialog():
+    is_open = solara.reactive(True)
+    on_ok = MagicMock()
+    el = ConfirmationDialog(is_open, on_ok=on_ok, content="Hello")
+    _, rc = solara.render(el, handle_error=False)
+    buttons = rc.find(vw.Btn)
+    assert len(buttons) == 2
+    buttons[0].widget.click()
+    assert on_ok.call_count == 1  # was OK button clicked?
+    assert not is_open.value  # is dialog closed?