TST: add test for dpi change

tacaswell · tacaswell · commit 533f0bbb015e · 2017-04-17T17:02:44.000-04:00
diff --git a/lib/matplotlib/tests/test_figure.py b/lib/matplotlib/tests/test_figure.py
@@ -214,6 +214,18 @@ def test_figaspect():
     assert h / w == 1
 
 
+@cleanup(style='default')
+def test_change_dpi():
+    fig = plt.figure(figsize=(4, 4))
+    fig.canvas.draw()
+    assert fig.canvas.renderer.height == 400
+    assert fig.canvas.renderer.width == 400
+    fig.dpi = 50
+    fig.canvas.draw()
+    assert fig.canvas.renderer.height == 200
+    assert fig.canvas.renderer.width == 200
+
+
 if __name__ == "__main__":
     import nose
     nose.runmodule(argv=['-s', '--with-doctest'], exit=False)
