🤖 add manual test

Author: jvdd

tests/test_figure_resampler.py

@@ -629,6 +629,39 @@ def test_stop_server_inline_persistent():
     proc.terminate()
 
 
+def test_manual_jupyterdashpersistentinline():
+    # Manually call the JupyterDashPersistentInline its method
+    # This requires some gimmicky stuff to mimmick the behaviour of a jupyter notebook.
+
+    fr = FigureResampler(go.Figure())
+    n = 100_000
+    x = np.arange(n)
+    y = np.sin(x)
+    fr.add_trace(go.Scattergl(name="test"), hf_x=x, hf_y=y)
+
+    # no need to start the app (we just need the FigureResampler object)
+
+    from plotly_resampler.figure_resampler.figure_resampler import JupyterDashPersistentInlineOutput
+    import dash
+    app = JupyterDashPersistentInlineOutput("manual_app")
+    assert hasattr(app, "_uid")
+
+    # Mimmick what happens in the .show_dash method
+    # note: this is necessary because the figure gets accessed in the J
+    # JupyterDashPersistentInline its _display_inline_output method (to create the img)
+    app.layout = dash.html.Div(
+        [
+            dash.dcc.Graph(
+                id="resample-figure", figure=fr
+            ),
+            # no need to add traceupdater for this dummy app
+        ]
+    )
+
+    # call the method
+    app._display_in_jupyter(f"", port="", mode="inline", width='100%', height=500)
+
+
 def test_stop_server_external():
     fr = FigureResampler(go.Figure())
     n = 100_000