Add a test for history search with unique=True

IPython/core/tests/test_history.py

@@ -89,6 +89,7 b' def test_history():'
             # Check get_hist_search
             gothist = ip.history_manager.search("*test*")
             nt.assert_equal(list(gothist), [(1,2,hist[1])] )
+
             gothist = ip.history_manager.search("*=*")
             nt.assert_equal(list(gothist),
                             [(1, 1, hist[0]),
@@ -97,12 +98,22 b' def test_history():'
                              newhist[0],
                              newhist[2],
                              newhist[3]])
+
             gothist = ip.history_manager.search("*=*", n=4)
             nt.assert_equal(list(gothist),
                             [(1, 3, hist[2]),
                              newhist[0],
                              newhist[2],
                              newhist[3]])
+
+            gothist = ip.history_manager.search("*=*", unique=True)
+            nt.assert_equal(list(gothist),
+                            [(1, 1, hist[0]),
+                             (1, 2, hist[1]),
+                             (1, 3, hist[2]),
+                             newhist[2],
+                             newhist[3]])
+
             gothist = ip.history_manager.search("b*", output=True)
             nt.assert_equal(list(gothist), [(1,3,(hist[2],"spam"))] )