Added tests for period str and repr. (pandas-dev#53003)

* Added tests for period str and repr. Fixes pandas-dev#53000

* Removed commented params in test, improved test for repr, and blackened.

* Better tests

* Moved the two independent tests into parametrized test

---------

Co-authored-by: Sylvain MARIE <[email protected]>

Author: 2 people

pandas/tests/scalar/period/test_period.py

@@ -705,27 +705,41 @@ def test_to_timestamp_microsecond(self, ts, expected, freq):
     # --------------------------------------------------------------
     # Rendering: __repr__, strftime, etc
 
-    def test_repr(self):
-        p = Period("Jan-2000")
-        assert "2000-01" in repr(p)
-
-        p = Period("2000-12-15")
-        assert "2000-12-15" in repr(p)
+    @pytest.mark.parametrize(
+        "str_ts,freq,str_res,str_freq",
+        (
+            ("Jan-2000", None, "2000-01", "M"),
+            ("2000-12-15", None, "2000-12-15", "D"),
+            (
+                "2000-12-15 13:45:26.123456789",
+                "N",
+                "2000-12-15 13:45:26.123456789",
+                "N",
+            ),
+            ("2000-12-15 13:45:26.123456789", "U", "2000-12-15 13:45:26.123456", "U"),
+            ("2000-12-15 13:45:26.123456", None, "2000-12-15 13:45:26.123456", "U"),
+            ("2000-12-15 13:45:26.123456789", "L", "2000-12-15 13:45:26.123", "L"),
+            ("2000-12-15 13:45:26.123", None, "2000-12-15 13:45:26.123", "L"),
+            ("2000-12-15 13:45:26", "S", "2000-12-15 13:45:26", "S"),
+            ("2000-12-15 13:45:26", "T", "2000-12-15 13:45", "T"),
+            ("2000-12-15 13:45:26", "H", "2000-12-15 13:00", "H"),
+            ("2000-12-15", "Y", "2000", "A-DEC"),
+            ("2000-12-15", "Q", "2000Q4", "Q-DEC"),
+            ("2000-12-15", "M", "2000-12", "M"),
+            ("2000-12-15", "W", "2000-12-11/2000-12-17", "W-SUN"),
+            ("2000-12-15", "D", "2000-12-15", "D"),
+            ("2000-12-15", "B", "2000-12-15", "B"),
+        ),
+    )
+    def test_repr(self, str_ts, freq, str_res, str_freq):
+        p = Period(str_ts, freq=freq)
+        assert str(p) == str_res
+        assert repr(p) == f"Period('{str_res}', '{str_freq}')"
 
     def test_repr_nat(self):
         p = Period("nat", freq="M")
         assert repr(NaT) in repr(p)
 
-    def test_millisecond_repr(self):
-        p = Period("2000-01-01 12:15:02.123")
-
-        assert repr(p) == "Period('2000-01-01 12:15:02.123', 'L')"
-
-    def test_microsecond_repr(self):
-        p = Period("2000-01-01 12:15:02.123567")
-
-        assert repr(p) == "Period('2000-01-01 12:15:02.123567', 'U')"
-
     def test_strftime(self):
         # GH#3363
         p = Period("2000-1-1 12:34:12", freq="S")