Snapshot tests for column and row cursors in DataTable

tests/snapshot_tests/snapshot_apps/data_table_column_cursor.py

@@ -0,0 +1,35 @@
+import csv
+import io
+
+from textual.app import App, ComposeResult
+from textual.widgets import DataTable
+
+CSV = """lane,swimmer,country,time
+4,Joseph Schooling,Singapore,50.39
+2,Michael Phelps,United States,51.14
+5,Chad le Clos,South Africa,51.14
+6,László Cseh,Hungary,51.14
+3,Li Zhuhao,China,51.26
+8,Mehdy Metella,France,51.58
+7,Tom Shields,United States,51.73
+1,Aleksandr Sadovnikov,Russia,51.84"""
+
+
+class TableApp(App):
+    def compose(self) -> ComposeResult:
+        table = DataTable()
+        table.focus()
+        table.cursor_type = "column"
+        table.fixed_columns = 1
+        yield table
+
+    def on_mount(self) -> None:
+        table = self.query_one(DataTable)
+        rows = csv.reader(io.StringIO(CSV))
+        table.add_columns(*next(rows))
+        table.add_rows(rows)
+
+
+if __name__ == "__main__":
+    app = TableApp()
+    app.run()

tests/snapshot_tests/snapshot_apps/data_table_row_cursor.py

@@ -0,0 +1,34 @@
+import csv
+import io
+
+from textual.app import App, ComposeResult
+from textual.widgets import DataTable
+
+CSV = """lane,swimmer,country,time
+4,Joseph Schooling,Singapore,50.39
+2,Michael Phelps,United States,51.14
+5,Chad le Clos,South Africa,51.14
+6,László Cseh,Hungary,51.14
+3,Li Zhuhao,China,51.26
+8,Mehdy Metella,France,51.58
+7,Tom Shields,United States,51.73
+1,Aleksandr Sadovnikov,Russia,51.84"""
+
+
+class TableApp(App):
+    def compose(self) -> ComposeResult:
+        table = DataTable()
+        table.focus()
+        table.cursor_type = "row"
+        yield table
+
+    def on_mount(self) -> None:
+        table = self.query_one(DataTable)
+        rows = csv.reader(io.StringIO(CSV))
+        table.add_columns(*next(rows))
+        table.add_rows(rows)
+
+
+if __name__ == "__main__":
+    app = TableApp()
+    app.run()

tests/snapshot_tests/test_snapshots.py

@@ -93,6 +93,16 @@ def test_datatable_render(snap_compare):
     assert snap_compare(WIDGET_EXAMPLES_DIR / "data_table.py", press=press)
 
 
+def test_datatable_row_cursor_render(snap_compare):
+    press = ["up", "left", "right", "down", "down", "_"]
+    assert snap_compare(SNAPSHOT_APPS_DIR / "data_table_row_cursor.py", press=press)
+
+
+def test_datatable_column_cursor_render(snap_compare):
+    press = ["left", "up", "down", "right", "right", "_"]
+    assert snap_compare(SNAPSHOT_APPS_DIR / "data_table_column_cursor.py", press=press)
+
+
 def test_footer_render(snap_compare):
     assert snap_compare(WIDGET_EXAMPLES_DIR / "footer.py")
 
@@ -147,11 +157,11 @@ def test_multiple_css(snap_compare):
 
 
 def test_order_independence(snap_compare):
-    assert snap_compare("snapshot_apps/order_independence.py")
+    assert snap_compare("snapshot_apps/layer_order_independence.py")
 
 
 def test_order_independence_toggle(snap_compare):
-    assert snap_compare("snapshot_apps/order_independence.py", press="t,_")
+    assert snap_compare("snapshot_apps/layer_order_independence.py", press="t,_")
 
 
 def test_columns_height(snap_compare):