Add tests for dictionary-style plotly.Figure

Author: ayjayt

src/py/tests/test_calc_fig.py

@@ -17,10 +17,16 @@ async def test_calc_fig():
     with warnings.catch_warnings():
         warnings.filterwarnings("ignore", category=DeprecationWarning)
         fig = px.line(x=[1, 2, 3, 4], y=[1, 2, 3, 4])
+
     img = await kaleido.calc_fig(fig)
     assert img
+
     img = kaleido.calc_fig_sync(fig)
     assert img
+
+    img = kaleido.calc_fig_sync(fig.to_dict())
+    assert img
+
     with pytest.raises(TypeError):
         # can't accept iterables
         img = kaleido.calc_fig_sync([fig, fig])