Add deepreload unit test.

Thanks to Fernando for the suggestion and starting code.

IPython/lib/tests/test_deepreload.py

@@ -0,0 +1,15 b''
+"""Test suite for the deepreload module."""
+
+from IPython.testing import decorators as dec
+from IPython.lib.deepreload import reload as dreload
+
[e-mail]_not_numpy
+def test_deepreload_numpy():
+    import numpy
+    exclude = [
+        # Standard exclusions:
+        'sys', 'os.path', '__builtin__', '__main__',
+        # Test-related exclusions:
+        'unittest',
+        ]
+    dreload(numpy, exclude=exclude)