Add test for single-element list and index case

pandas/tests/series/test_constructors.py

@@ -422,6 +422,14 @@ def test_constructor_numpy_scalar(self):
         expected = Series(100, index=np.arange(4), dtype='int64')
         tm.assert_series_equal(result, expected)
 
+    def test_constructor_broadcast_list(self):
+        # GH 19342
+        # construction with single-element container and index
+        # should not raise
+        result = Series(['foo'], index=['a', 'b', 'c'])
+        expected = Series(['foo'] * 3, index=['a', 'b', 'c'])
+        tm.assert_series_equal(result, expected)
+
     def test_constructor_corner(self):
         df = tm.makeTimeDataFrame()
         objs = [df, df]