testing: add test for SF#2856495

astraw · astraw · commit 122789332c0c · 2009-09-10T22:32:08.000Z
svn path=/trunk/matplotlib/; revision=7733
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -878,6 +878,7 @@ def tk_window_focus():
 
 default_test_modules = [
     'matplotlib.tests.test_agg',
+    'matplotlib.tests.test_backend_svg',
     'matplotlib.tests.test_basic',
     'matplotlib.tests.test_cbook',
     'matplotlib.tests.test_transforms',
diff --git a/lib/matplotlib/tests/test_backend_svg.py b/lib/matplotlib/tests/test_backend_svg.py
@@ -0,0 +1,30 @@
+import matplotlib.pyplot as plt
+import numpy as np
+import cStringIO as StringIO
+import xml.parsers.expat
+from matplotlib.testing.decorators import knownfailureif
+
+@knownfailureif(True)
+def test_visibility():
+    # This is SF 2856495. See
+    # https://sourceforge.net/tracker/?func=detail&aid=2856495&group_id=80706&atid=560720
+    fig=plt.figure()
+    ax=fig.add_subplot(1,1,1)
+
+    x = np.linspace(0,4*np.pi,50)
+    y = np.sin(x)
+    yerr = np.ones_like(y)
+
+    a,b,c=ax.errorbar(x,y,yerr=yerr,fmt='ko')
+    for artist in b:
+        artist.set_visible(False)
+
+    fd = StringIO.StringIO()
+    fig.savefig(fd,format='svg')
+
+    fd.seek(0)
+    buf = fd.read()
+    fd.close()
+
+    parser = xml.parsers.expat.ParserCreate()
+    parser.Parse(buf) # this will raise ExpatError if the svg is invalid
