test: columns with empty names in DataGrid

Author: ErdaradunGaztea

tests/playwright/shiny/bugs/1844-datagrid-empty-column/app.py

@@ -0,0 +1,22 @@
+import pandas as pd
+
+from shiny import App, Inputs, reactive, render, ui
+
+app_ui = ui.page_fluid(
+    ui.output_data_frame("df1")
+)
+
+
+def server(input: Inputs):
+    df = reactive.Value(pd.DataFrame({
+        "": [1, 2],
+        "A": [4, 5],
+        " ": [7, 8]
+    }))
+
+    @render.data_frame
+    def df1():
+        return render.DataGrid(df())
+
+
+app = App(app_ui, server)

tests/playwright/shiny/bugs/1844-datagrid-empty-column/test_1844_datagrid_empty_column.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from playwright.sync_api import Page
+
+from shiny.playwright import controller
+from shiny.run import ShinyAppProc
+
+
+def test_row_selection(page: Page, local_app: ShinyAppProc) -> None:
+    page.goto(local_app.url)
+
+    df = controller.OutputDataFrame(page, "df1")
+    df.expect_nrow(2)
+    df.expect_ncol(3)
+    df.expect_column_labels(["", "A", " "])
+
+    df.expect_cell("1", row=0, col=0)
+    df.expect_cell("2", row=1, col=0)
+    df.expect_cell("4", row=0, col=1)
+    df.expect_cell("8", row=1, col=2)