Do not type check against float

Turns out int is not the same type as float...

Author: mwcraig

src/astro_image_display_api/widget_api_test.py

@@ -1,6 +1,6 @@
+import numbers
 
 import pytest
-
 import numpy as np  # noqa: E402
 
 from astropy.coordinates import SkyCoord  # noqa: E402
@@ -170,7 +170,7 @@ def test_viewport_is_defined_aster_loading_image(self, data):
         assert isinstance(vport['center'], tuple)
         assert 'fov' in vport
         # fov should be a float since no WCS
-        assert isinstance(vport['fov'], float)
+        assert isinstance(vport['fov'], numbers.Real)
         assert 'image_label' in vport
         assert vport['image_label'] is None
 
@@ -229,7 +229,7 @@ def test_get_viewport_sky_or_pixel(self, data, wcs):
         assert vport_pixel['center'] == wcs.crpix
         # tbh, not at all sure what the fov should be in pixel coordinates,
         # so just check that it is a float.
-        assert isinstance(vport_pixel['fov'], float)
+        assert isinstance(vport_pixel['fov'], numbers.Real)
 
         # Get the viewport in world coordinates
         vport_world = self.image.get_viewport(image_label='test', sky_or_pixel='sky')