Add test for unicode in logging.

IPython/core/tests/test_logger.py

@@ -1,19 +1,31 b''
 """Test IPython.core.logger"""
 
+import os.path
+
 import nose.tools as nt
+from IPython.utils.tempdir import TemporaryDirectory
 
 _ip = get_ipython()
 
 def test_logstart_inaccessible_file():
     try:
         _ip.logger.logstart(logfname="/")   # Opening that filename will fail.
     except IOError:
         pass
     else:
         nt.assert_true(False)           # The try block should never pass.
     
     try:
         _ip.run_cell("a=1")                 # Check it doesn't try to log this
     finally:
         _ip.logger.log_active = False  # If this fails, don't let later tests fail
     
+def test_logstart_unicode():
+    with TemporaryDirectory() as tdir:
+        logfname = os.path.join(tdir, "test_unicode.log")
+        _ip.run_cell("'abc€'")
+        try:
+            _ip.magic("logstart -to %s" % logfname)
+            _ip.run_cell("'abc€'")
+        finally:
+            _ip.logger.logstop()