Check deps in matplotlib.test()

jenshnielsen · jenshnielsen · commit 33493f702a26 · 2015-07-12T11:40:10.000-05:00
And print an informative message
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -1449,8 +1449,21 @@ def tk_window_focus():
     ]
 
 
+def verify_test_dependencies():
+    try:
+        import nose
+        try:
+            from unittest import mock
+        except:
+            import mock
+    except ImportError:
+        print("matplotlib.test requires nose and mock to run.")
+        raise
+
+
 def test(verbosity=1):
     """run the matplotlib test suite"""
+    verify_test_dependencies()
     try:
         import faulthandler
     except ImportError:
