TST: Implemented an unused test for np.random.randint

In numpy/random/tests/test_random.py, a class called TestSingleEltArrayInput had a method called test_randint that was commented out, with the instructions to uncomment it once np.random.randint was able to broadcast arguments. Since np.random.randint has been able to broadcast arguments for a while now, I uncommented the test. The only modification I made to the code was fixing a small error, where the author incorrectly tried to call "assert_equal" as a method of the TestSingleEltArrayInput instead of a function that was imported from numpy.testing. I ran runtests.py, and the new test passed.

numpy/random/tests/test_random.py

@@ -1712,23 +1712,22 @@ def test_two_arg_funcs(self):
             out = func(self.argOne, argTwo[0])
             assert_equal(out.shape, self.tgtShape)
 
-# TODO: Uncomment once randint can broadcast arguments
-#    def test_randint(self):
-#        itype = [bool, np.int8, np.uint8, np.int16, np.uint16,
-#                 np.int32, np.uint32, np.int64, np.uint64]
-#        func = np.random.randint
-#        high = np.array([1])
-#        low = np.array([0])
-#
-#        for dt in itype:
-#            out = func(low, high, dtype=dt)
-#            self.assert_equal(out.shape, self.tgtShape)
-#
-#            out = func(low[0], high, dtype=dt)
-#            self.assert_equal(out.shape, self.tgtShape)
-#
-#            out = func(low, high[0], dtype=dt)
-#            self.assert_equal(out.shape, self.tgtShape)
+    def test_randint(self):
+        itype = [bool, np.int8, np.uint8, np.int16, np.uint16,
+                 np.int32, np.uint32, np.int64, np.uint64]
+        func = np.random.randint
+        high = np.array([1])
+        low = np.array([0])
+
+        for dt in itype:
+            out = func(low, high, dtype=dt)
+            assert_equal(out.shape, self.tgtShape)
+
+            out = func(low[0], high, dtype=dt)
+            assert_equal(out.shape, self.tgtShape)
+
+            out = func(low, high[0], dtype=dt)
+            assert_equal(out.shape, self.tgtShape)
 
     def test_three_arg_funcs(self):
         funcs = [np.random.noncentral_f, np.random.triangular,