Skip test if latex not installed

jenshnielsen · jenshnielsen · commit d38ec3456f65 · 2016-08-13T09:28:52.000+01:00
Cannot use the decorator for similar reasons as #6263
diff --git a/lib/matplotlib/tests/test_usetex.py b/lib/matplotlib/tests/test_usetex.py
@@ -3,13 +3,20 @@
 
 import matplotlib
 from matplotlib.testing.decorators import image_comparison
+from matplotlib.compat.subprocess import check_output
 import matplotlib.pyplot as plt
 
 
 @image_comparison(baseline_images=['test_usetex'],
                   extensions=['pdf', 'png'],
                   tol=0.3)
 def test_usetex():
+    cmd = ['latex', '-version']
+    try:
+        check_output(cmd)
+    except:
+        from nose import SkipTest
+        raise SkipTest('missing command: %s' % cmd[0])
     matplotlib.rcParams['text.usetex'] = True
     fig = plt.figure()
     ax = fig.add_subplot(111)
