new qq test with fully-spec'd dist

Author: phobson

probscale/tests/baseline_images/test_viz/test_probplot_qq_dist.png

@@ -392,6 +392,15 @@ def test_probplot_qq(plot_data):
     return fig
 
 
+@pytest.mark.mpl_image_compare(baseline_dir=BASELINE_DIR, tolerance=10)
+def test_probplot_qq_dist(plot_data):
+    fig, ax = plt.subplots()
+    norm = stats.norm(*stats.norm.fit(plot_data))
+    fig = viz.probplot(plot_data, ax=ax, plottype='qq', dist=norm,
+                       datalabel='Test label')
+    return fig
+
+
 @pytest.mark.mpl_image_compare(baseline_dir=BASELINE_DIR, tolerance=10)
 def test_probplot_pp(plot_data):
     fig, ax = plt.subplots()