implement test_constructors for Timestamp (#31583)

Author: jbrockmendel

pandas/tests/indexes/datetimes/test_constructors.py

@@ -950,17 +950,3 @@ def test_datetimeindex_constructor_misc(self):
         )
         assert len(idx1) == len(idx2)
         assert idx1.freq == idx2.freq
-
-
-def test_timedelta_constructor_identity():
-    # Test for #30543
-    expected = pd.Timedelta(np.timedelta64(1, "s"))
-    result = pd.Timedelta(expected)
-    assert result is expected
-
-
-def test_timestamp_constructor_identity():
-    # Test for #30543
-    expected = pd.Timestamp("2017-01-01T12")
-    result = pd.Timestamp(expected)
-    assert result is expected

pandas/tests/scalar/timedelta/test_constructors.py

@@ -274,3 +274,10 @@ def test_td_constructor_on_nanoseconds(constructed_td, conversion):
 def test_td_constructor_value_error():
     with pytest.raises(TypeError):
         Timedelta(nanoseconds="abc")
+
+
+def test_timedelta_constructor_identity():
+    # Test for #30543
+    expected = Timedelta(np.timedelta64(1, "s"))
+    result = Timedelta(expected)
+    assert result is expected