ENH: added a rudimentary test for having #1517 (too many open files) fixed

1 files changed, 24 insertions, 0 deletions

diff --git a/numpy/lib/tests/test_io.py b/numpy/lib/tests/test_io.py
index e9158baa8..f6cc365ef 100644
--- a/numpy/lib/tests/test_io.py
+++ b/numpy/lib/tests/test_io.py
@@ -185,9 +185,33 @@ class TestSavezLoad(RoundtripTest, TestCase):
             assert_(not fp.closed)        # must not get closed by .load(opened fp)
             fp.seek(0)
             assert_(not fp.closed)
+
+        finally:
+            os.remove(tmp)
+
+    def test_closing_fid(self):
+        # Test that issue #1517 (too many opened files) remains closed
+        # It might be a "week" test since failed to get triggered on
+        # e.g. Debian sid of 2012 Jul 05 but was reported to
+        # trigger the failure on Ubuntu 10.04:
+        # http://projects.scipy.org/numpy/ticket/1517#comment:2
+        fd, tmp = mkstemp(suffix='.npz')
+        os.close(fd)
+
+        try:
+            fp = open(tmp, 'w')
+            np.savez(fp, data='LOVELY LOAD')
+            fp.close()
+
+            for i in range(1, 1025):
+                try:
+                    np.load(tmp)["data"]
+                except Exception, e:
+                    raise AssertionError("Failed to load data from a file: %s" % e)
         finally:
             os.remove(tmp)
 
+
 class TestSaveTxt(TestCase):
     def test_array(self):
         a = np.array([[1, 2], [3, 4]], float)