test strip_encoding_cookie transformer

IPython/core/tests/test_inputtransformer.py

@@ -65,6 +65,13 syntax = \
         ('    ','    '),  # blank lines are kept intact
         ],
 
+       strip_encoding_cookie =
+       [
+        ('# -*- encoding: utf-8 -*-', ''),
+        ('# coding: latin-1', ''),
+       ],
+
+
        # Tests for the escape transformer to leave normal code alone
        escaped_noesc =
        [ ('    ', '    '),
@@ -203,6 +210,20 syntax_ml = \
           ],
          ],
 
+       strip_encoding_cookie =
+       [
+        [
+            ('# -*- coding: utf-8 -*-', ''),
+            ('foo', 'foo'),
+        ],
+        [
+            ('#!/usr/bin/env python', '#!/usr/bin/env python'),
+            ('# -*- coding: latin-1 -*-', ''),
+            # only the first-two lines
+            ('# -*- coding: latin-1 -*-', '# -*- coding: latin-1 -*-'),
+        ],
+       ],
+
        multiline_datastructure_prompt =
        [ [('>>> a = [1,','a = [1,'),
           ('... 2]','2]'),
@@ -291,6 +312,11 def test_ipy_prompt():
     for example in syntax_ml['ipy_prompt']:
         transform_checker(example, ipt.ipy_prompt)
 
+def test_coding_cookie():
+    tt.check_pairs(transform_and_reset(ipt.strip_encoding_cookie), syntax['strip_encoding_cookie'])
+    for example in syntax_ml['strip_encoding_cookie']:
+        transform_checker(example, ipt.strip_encoding_cookie)
+
 def test_assemble_logical_lines():
     tests = \
     [ [(u"a = \\", None),