skip multiline history tests on windows

readline has no remove_history_item

IPython/frontend/terminal/tests/test_interactivshell.py

@@ -38,10 +38,13 b' class InteractiveShellTestCase(unittest.TestCase):'
         """Test that function does not throw on windows without
            remove_history_item"""
         ip = get_ipython()
+        if hasattr(ip.readline, 'remove_history_item'):
         del ip.readline.remove_history_item
         ip._replace_rlhist_multiline(u'source', 0)
 
     @skipif(not get_ipython().has_readline, 'no readline')
+    @skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
+            'no remove_history_item')
     def test_replace_multiline_hist_disabled(self):
         """Test that multiline replace does nothing if disabled"""
         ip = get_ipython()
@@ -60,6 +63,8 b' class InteractiveShellTestCase(unittest.TestCase):'
         self.assertEquals(hist, ghist)
 
     @skipif(not get_ipython().has_readline, 'no readline')
+    @skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
+            'no remove_history_item')
     def test_replace_multiline_hist_adds(self):
         """Test that multiline replace function adds history"""
         ip = get_ipython()
@@ -71,6 +76,8 b' class InteractiveShellTestCase(unittest.TestCase):'
                           ip.readline.get_current_history_length())
 
     @skipif(not get_ipython().has_readline, 'no readline')
+    @skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
+            'no remove_history_item')
     def test_replace_multiline_hist_keeps_history(self):
         """Test that multiline replace does not delete history"""
         ip = get_ipython()
@@ -93,6 +100,8 b' class InteractiveShellTestCase(unittest.TestCase):'
 
 
     @skipif(not get_ipython().has_readline, 'no readline')
+    @skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
+            'no remove_history_item')
     def test_replace_multiline_hist_replaces_twice(self):
         """Test that multiline entries are replaced twice"""
         ip = get_ipython()
@@ -119,6 +128,8 b' class InteractiveShellTestCase(unittest.TestCase):'
 
 
     @skipif(not get_ipython().has_readline, 'no readline')
+    @skipif(not hasattr(get_ipython().readline, 'remove_history_item'),
+            'no remove_history_item')
     def test_replace_multiline_hist_replaces_empty_line(self):
         """Test that multiline history skips empty line cells"""
         ip = get_ipython()