Images selected for scatter test and base image added

Author: ruaridhg

src/napari_matplotlib/tests/baseline/test_scatter.png

@@ -12,8 +12,13 @@
 def test_scatter(make_napari_viewer, astronaut_data):
     # Smoke test adding a scatter widget
     viewer = make_napari_viewer()
-    viewer.add_image(astronaut_data[0], **astronaut_data[1])
-    viewer.add_image(astronaut_data[0] * -1, **astronaut_data[1])
+    viewer.add_image(astronaut_data[0], **astronaut_data[1], name="astronaut")
+    viewer.add_image(
+        astronaut_data[0] * -1, **astronaut_data[1], name="astronaut_reversed"
+    )
+    viewer.layers.selection.add(viewer.layers[0])
+    viewer.layers.selection.add(viewer.layers[1])
+    print(list(viewer.layers.selection))
     fig = ScatterWidget(viewer).figure
     # Need to return a copy, as original figure is too eagerley garbage
     # collected by the widget