Add test

Author: gcaria

pandas/tests/frame/test_constructors.py

@@ -1203,6 +1203,12 @@ def test_constructor_DataFrame(self, float_frame):
         df_casted = DataFrame(float_frame, dtype=np.int64)
         assert df_casted.values.dtype == np.int64
 
+    def test_constructor_empty_DataFrame(self):
+
+        actual = pd.DataFrame(pd.DataFrame(), dtype="object")
+        expected = pd.DataFrame([], dtype="object")
+        tm.assert_frame_equal(actual, expected)
+
     def test_constructor_more(self, float_frame):
         # used to be in test_matrix.py
         arr = np.random.randn(10)