TST: numpy_test: run some of the buffer tests only when a sufficiently new...

TST: numpy_test: run some of the buffer tests only when a sufficiently new Numpy version is available

tests/run/numpy_test.pyx

@@ -193,6 +193,26 @@ try:
     ValueError: ...
 
 
+    >>> test_good_cast()
+    True
+    >>> test_bad_cast()
+    Traceback (most recent call last):
+        ...
+    ValueError: Item size of buffer (1 byte) does not match size of 'int' (4 bytes)
+
+    >>> test_complextypes()
+    1,1
+    1,1
+    8,16
+
+    >>> test_point_record()
+    array([(0.0, 0.0), (1.0, -1.0), (2.0, -2.0)], 
+          dtype=[('x', '!f8'), ('y', '!f8')])
+    
+"""
+
+    if np.__version__ >= '1.6':
+        __doc__ += u"""
         The following expose bugs in Numpy (versions prior to 2011-04-02):
         
         >>> print(test_partially_packed_align(np.zeros((1,), dtype=np.dtype([('a', 'b'), ('b', 'i'), ('sub', np.dtype('b,i')), ('c', 'i')], align=True))))
@@ -212,25 +232,8 @@ try:
         Traceback (most recent call last):
             ...
         ValueError: ...
+        """
 
-
-    >>> test_good_cast()
-    True
-    >>> test_bad_cast()
-    Traceback (most recent call last):
-        ...
-    ValueError: Item size of buffer (1 byte) does not match size of 'int' (4 bytes)
-
-    >>> test_complextypes()
-    1,1
-    1,1
-    8,16
-
-    >>> test_point_record()
-    array([(0.0, 0.0), (1.0, -1.0), (2.0, -2.0)], 
-          dtype=[('x', '!f8'), ('y', '!f8')])
-    
-"""
 except:
     __doc__ = u""