tests: Disable large-read test to avoid consuming too much RAM

There's no good way to conditionalize on the amount of system RAM
using only the stdlib.

Author: bgilbert

tests/test_openslide.py

@@ -122,11 +122,13 @@ def test_read_region_bad_size(self):
         self.assertRaises(OpenSlideError,
                 lambda: self.osr.read_region((0, 0), 1, (400, -5)))
 
+    # Disabled to avoid OOM killer on small systems, since the stdlib
+    # doesn't provide a way to find out how much RAM we have
     @skip_if(sys.maxsize < 1 << 32, '32-bit Python')
     # Also skips Pillow < 2.1.0
     @skip_if(have_optimizations and not hasattr(Image, 'PILLOW_VERSION'),
             'broken on PIL')
-    def test_read_region_2GB(self):
+    def _test_read_region_2GB(self):
         self.assertEqual(
                 self.osr.read_region((1000, 1000), 0, (32768, 16384)).size,
                 (32768, 16384))