✨ Tester for Textualize/textual#4248

click_markup.py

@@ -0,0 +1,27 @@
+"""https://github.com/Textualize/textual/issues/4248"""
+
+from textual.app import App, ComposeResult
+from textual.widgets import Label
+
+
+class ClickMRE(App):
+    def compose(self) -> ComposeResult:
+        yield Label(
+            "[@click]click me and crash[/]"
+        )  # ValueError in run_action on click
+        yield Label(
+            "[@click=]click me and crash[/]"
+        )  # ValueError in run_action on click
+        yield Label(
+            "[@click=()]click me and crash[/]"
+        )  # ValueError in run_action on click
+        yield Label("[@click=foobar]click me[/]")  # ok, nothing happens
+        yield Label("[@click=foobar()]click me[/]")  # ok, nothing happens
+        yield Label("[@click=toggle_dark]click me[/]")  # ok, works fine
+        yield Label("[@click=toggle_dark()]click me[/]")  # ok, works fine
+
+
+if __name__ == "__main__":
+    ClickMRE().run()
+
+### click_markup.py ends here