Add async callback test

panel/tests/widgets/test_tables.py

@@ -23,6 +23,7 @@
 
 from panel.depends import bind
 from panel.io.server import serve
+from panel.io.state import set_curdoc
 from panel.models.tabulator import CellClickEvent, TableEditEvent
 from panel.widgets import Button, TextInput
 from panel.widgets.tables import DataFrame, Tabulator
@@ -1693,6 +1694,8 @@ def test_tabulator_patch_event():
             table._process_event(event)
             assert values[-1] == (col, row, df[col].iloc[row])
 
+
+
 def test_server_edit_event():
     df = makeMixedDataFrame()
     table = Tabulator(df)
@@ -1735,6 +1738,42 @@ def test_tabulator_cell_click_event():
             table._process_event(event)
             assert values[-1] == (col, row, data[col].iloc[row])
 
+def test_server_cell_click_async_event():
+    df = makeMixedDataFrame()
+    table = Tabulator(df)
+
+    counts = []
+    async def cb(event, count=[0]):
+        import asyncio
+        count[0] += 1
+        counts.append(count[0])
+        await asyncio.sleep(1)
+        count[0] -= 1
+
+    table.on_click(cb)
+
+    port = 7002
+    serve(table, port=port, threaded=True, show=False)
+
+    # Wait for server to start
+    time.sleep(1)
+
+    requests.get(f"http://localhost:{port}/")
+
+    data = df.reset_index()
+    doc = list(table._models.values())[0][0].document
+    with set_curdoc(doc):
+        for col in data.columns:
+            for row in range(len(data)):
+                event = CellClickEvent(model=None, column=col, row=row)
+                table._process_event(event)
+
+    # Wait for callbacks to be scheduled
+    time.sleep(2)
+
+    # Ensure multiple callbacks started concurrently
+    assert max(counts) > 1
+
 def test_tabulator_pagination_remote_cell_click_event():
     df = makeMixedDataFrame()
     table = Tabulator(df, pagination='remote', page_size=2)