add tests

tests/snapshot_tests/snapshot_apps/label_widths.py

@@ -0,0 +1,45 @@
+from textual.app import App
+from textual.widgets import Label, Static
+from rich.panel import Panel
+
+
+class LabelWrap(App):
+    CSS = """Screen {
+              align: center middle;
+          }
+
+          #l_data {
+              border: blank;
+              background: lightgray;
+          }
+
+          #s_data {
+              border: blank;
+              background: lightgreen;
+          }
+
+          #p_data {
+              border: blank;
+              background: lightgray;
+          }"""
+
+    def __init__(self):
+        super().__init__()
+
+        self.data = (
+            "Apple Banana Cherry Mango Fig Guava Pineapple:"
+            "Dragon Unicorn Centaur Phoenix Chimera Castle"
+        )
+
+    def compose(self):
+        yield Label(self.data, id="l_data")
+        yield Static(self.data, id="s_data")
+        yield Label(Panel(self.data), id="p_data")
+
+    def on_mount(self):
+        self.dark = False
+
+
+if __name__ == "__main__":
+    app = LabelWrap()
+    app.run()

tests/snapshot_tests/test_snapshots.py

@@ -193,3 +193,7 @@ def test_demo(snap_compare):
         press=["down", "down", "down"],
         terminal_size=(100, 30),
     )
+
+
+def test_label_widths(snap_compare):
+    assert snap_compare(SNAPSHOT_APPS_DIR / "label_widths.py")