Add test for missing input encoding. Back to 100% coverage.

IPython/core/inputsplitter.py

@@ -74,7 +74,9 b' def remove_comments(src):'
 
 
 def get_input_encoding():
-    """Return the default standard input encoding."""
+    """Return the default standard input encoding.
+
+    If sys.stdin has no encoding, 'ascii' is returned."""
     # There are strange environments for which sys.stdin.encoding is None. We
     # ensure that a valid encoding is returned.
     encoding = getattr(sys.stdin, 'encoding', None)

IPython/core/tests/test_inputsplitter.py

@@ -12,6 +12,7 b''
 #-----------------------------------------------------------------------------
 # stdlib
 import unittest
+import sys
 
 # Third party
 import nose.tools as nt
@@ -108,6 +109,23 b' def test_get_input_encoding():'
     nt.assert_equal('test'.encode(encoding), 'test')
 
 
+class NoInputEncodingTestCase(unittest.TestCase):
+    def setUp(self):
+        self.old_stdin = sys.stdin
+        class X: pass
+        fake_stdin = X()
+        sys.stdin = fake_stdin
+        
+    def test(self):
+        # Verify that if sys.stdin has no 'encoding' attribute we do the right
+        # thing
+        enc = isp.get_input_encoding()
+        self.assertEqual(enc, 'ascii')
+        
+    def tearDown(self):
+        sys.stdin = self.old_stdin
+
+
 class InputSplitterTestCase(unittest.TestCase):
     def setUp(self):
         self.isp = isp.InputSplitter()