Add tests for IPython.utils.openpy

IPython/utils/tests/test_openpy.py

@@ -0,0 +1,23 b''
+import io
+import os.path
+import nose.tools as nt
+
+from IPython.utils import openpy
+
+mydir = os.path.dirname(__file__)
+nonascii_path = os.path.join(mydir, '../../core/tests/nonascii.py')
+
+def test_detect_encoding():
+    f = open(nonascii_path, 'rb')
+    enc, lines = openpy.detect_encoding(f.readline)
+    nt.assert_equal(enc, 'iso-8859-5')
+
+def test_read_file():
+    read_specified_enc = io.open(nonascii_path, encoding='iso-8859-5').read()
+    read_detected_enc = openpy.read_py_file(nonascii_path, skip_encoding_cookie=False)
+    nt.assert_equal(read_detected_enc, read_specified_enc)
+    assert u'encoding: iso-8859-5' in read_detected_enc
+    
+    read_strip_enc_cookie = openpy.read_py_file(nonascii_path, skip_encoding_cookie=True)
+    assert u'encoding: iso-8859-5' not in read_strip_enc_cookie
+