Add duplicated entry in test_history

IPython/core/tests/test_history.py

@@ -61,7 +61,10 b' def test_history():'
 
             # New session
             ip.history_manager.reset()
-            newcmds = ["z=5","class X(object):\n    pass", "k='p'"]
+            newcmds = [u"z=5",
+                       u"class X(object):\n    pass",
+                       u"k='p'",
+                       u"z=5"]
             for i, cmd in enumerate(newcmds, start=1):
                 ip.history_manager.store_inputs(i, cmd)
             gothist = ip.history_manager.get_range(start=1, stop=4)
@@ -70,18 +73,17 b' def test_history():'
             gothist = ip.history_manager.get_range(-1, 1, 4)
             nt.assert_equal(list(gothist), zip([1,1,1],[1,2,3], hist))
 
+            newhist = [(2, i + 1, c) for (i, c) in enumerate(newcmds)]
+
             # Check get_hist_tail
-            gothist = ip.history_manager.get_tail(4, output=True,
+            gothist = ip.history_manager.get_tail(5, output=True,
                                                     include_latest=True)
-            expected = [(1, 3, (hist[-1], "spam")),
-                        (2, 1, (newcmds[0], None)),
-                        (2, 2, (newcmds[1], None)),
-                        (2, 3, (newcmds[2], None)),]
+            expected = [(1, 3, (hist[-1], "spam"))] \
+                + [(s, n, (c, None)) for (s, n, c) in newhist]
             nt.assert_equal(list(gothist), expected)
 
             gothist = ip.history_manager.get_tail(2)
-            expected = [(2, 1, newcmds[0]),
-                        (2, 2, newcmds[1])]
+            expected = newhist[-3:-1]
             nt.assert_equal(list(gothist), expected)
 
             # Check get_hist_search
@@ -92,13 +94,15 b' def test_history():'
                             [(1, 1, hist[0]),
                              (1, 2, hist[1]),
                              (1, 3, hist[2]),
-                             (2, 1, newcmds[0]),
-                             (2, 3, newcmds[2])])
-            gothist = ip.history_manager.search("*=*", n=3)
+                             newhist[0],
+                             newhist[2],
+                             newhist[3]])
+            gothist = ip.history_manager.search("*=*", n=4)
             nt.assert_equal(list(gothist),
                             [(1, 3, hist[2]),
-                             (2, 1, newcmds[0]),
-                             (2, 3, newcmds[2])])
+                             newhist[0],
+                             newhist[2],
+                             newhist[3]])
             gothist = ip.history_manager.search("b*", output=True)
             nt.assert_equal(list(gothist), [(1,3,(hist[2],"spam"))] )