✨ Add a tester for Textualize/textual#3045

tooltip_hell.py

@@ -0,0 +1,92 @@
+"""Test harness for tooltip issues."""
+
+from textual import on
+from textual.app import App, ComposeResult
+from textual.containers import Grid, VerticalScroll
+from textual.widget import Widget
+from textual.widgets import Button, Label
+
+class GoodTipper:
+
+    @staticmethod
+    def tip(widget: Widget) -> Widget:
+        widget.tooltip = (
+            f"[bold]This is a tooltip![/]\n\n"
+            f"[italic]The widget's ID is {widget.id}\n\n"
+            "It has a bunch of text. Cool huh?"
+        )
+        return widget
+
+class Buttonatron(Grid, GoodTipper, can_focus=True):
+
+    DEFAULT_CSS = """
+    Buttonatron {
+        height: 1fr;
+        grid-size: 5;
+        grid-rows: 5;
+
+        Button {
+           width: 1fr;
+           height: 1fr;
+           margin: 0 1 0 1;
+        }
+    }
+    """
+
+    BINDINGS = [("space", "add")]
+
+    def action_add(self) -> None:
+        button_id = str(len(self.children))
+        self.mount(
+            self.tip(
+                Button(f"Button #{button_id}\n\nPress me to remove me", id=f"button-{button_id}")
+            )
+        )
+
+    @on(Button.Pressed)
+    def remove_button(self, event: Button.Pressed) -> None:
+        event.control.remove()
+
+class LabelsAllTheWayDown(VerticalScroll, GoodTipper, can_focus=True):
+
+    DEFAULT_CSS = """
+    LabelsAllTheWayDown {
+        Grid {
+            grid-size: 5;
+            height: auto;
+            grid-rows: 10;
+            Label {
+                background: $panel;
+                border: panel cornflowerblue;
+                width: 1fr;
+                height: 1fr;
+                margin-bottom: 1;
+            }
+        }
+    }
+    """
+
+    def compose(self) -> ComposeResult:
+        with Grid():
+            for n in range(200):
+                yield self.tip(Label(f"Here is label #{n}", id=f"label-{n}"))
+
+class TooltipHellApp(App[None]):
+
+    CSS = """
+    Screen > * {
+        border: blank;
+        &:focus {
+            border: thick green;
+        }
+    }
+    """
+
+    def compose(self) -> ComposeResult:
+        yield Buttonatron()
+        yield LabelsAllTheWayDown()
+
+if __name__ == "__main__":
+    TooltipHellApp().run()
+
+### tooltip_hell.py ends here