add scale tests for plot_ly images

Author: michaelbabyn

plotly/tests/test_plot_ly/test_image/test_image.py

@@ -70,12 +70,6 @@ def _test(self):
     for test_generator in [_generate_image_get_returns_valid_image_test,
                            _generate_image_save_as_saves_valid_image]:
 
-        if args[0] in ['jpeg', 'pdf', 'svg'] and args[3] is not None:
-            # Shouldn't need to skip these tests, the server should
-            # be responding with a 400 level error since scale isn't supported,
-            # but it doesn't yet, so just skip them
-            continue
-
         _test = test_generator(*args)
         arg_string = ', '.join([str(a) for a in args])
         test_name = test_generator.__name__.replace('_generate', 'test')