From 5ada34dfedbd1ce6ecc262fd681f870451c85607 2011-10-09 18:03:26
From: Thomas Kluyver <takowl@gmail.com>
Date: 2011-10-09 18:03:26
Subject: [PATCH] Add simple smoketest for page._detect_screen_size.

---

diff --git a/IPython/core/page.py b/IPython/core/page.py
index 91dd5e2..8a98fee 100644
--- a/IPython/core/page.py
+++ b/IPython/core/page.py
@@ -31,6 +31,8 @@ import re
 import sys
 import tempfile
 
+from io import UnsupportedOperation
+
 from IPython.core import ipapi
 from IPython.core.error import TryNext
 from IPython.utils.cursesimport import use_curses
@@ -180,7 +182,7 @@ def page(strng, start=0, screen_lines=0, pager_cmd=None):
     if screen_lines <= 0:
         try:
             screen_lines += _detect_screen_size(use_curses, screen_lines_def)
-        except Exception:
+        except (TypeError, UnsupportedOperation):
             print >>io.stdout, str_toprint
             return
 
diff --git a/IPython/core/tests/test_page.py b/IPython/core/tests/test_page.py
new file mode 100644
index 0000000..28b23f8
--- /dev/null
+++ b/IPython/core/tests/test_page.py
@@ -0,0 +1,19 @@
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2010 The IPython Development Team.
+#
+#  Distributed under the terms of the BSD License.
+#
+#  The full license is in the file COPYING.txt, distributed with this software.
+#-----------------------------------------------------------------------------
+import io
+
+from IPython.core import page
+
+def test_detect_screen_size():
+    """Simple smoketest for page._detect_screen_size."""
+    try:
+        page._detect_screen_size(True, 25)
+    except (TypeError, io.UnsupportedOperation):
+        # This can happen in the test suite, because stdout may not have a
+        # fileno.
+        pass