add test case for frame

Author: minggli

pandas/tests/frame/test_replace.py

@@ -605,6 +605,20 @@ def test_replace_list(self):
 
         assert_frame_equal(res, expec)
 
+    def test_replace_with_empty_list(self):
+        # GH 21977
+        s = pd.Series([['a', 'b'], np.nan, [1]])
+        df = pd.DataFrame({'col': s})
+
+        expected = df
+        result = df.replace([], np.nan)
+        assert_frame_equal(result, expected)
+        # GH 19266
+        with tm.assert_raises_regex(NotImplementedError, 'Replace with array'):
+            df.replace({np.nan: []})
+        with tm.assert_raises_regex(NotImplementedError, 'Replace with array'):
+            df.replace({np.nan: ['dummy', 'alt']})
+
     def test_replace_series_dict(self):
         # from GH 3064
         df = DataFrame({'zero': {'a': 0.0, 'b': 1}, 'one': {'a': 2.0, 'b': 0}})