REF: collect tests by method (pandas-dev#37271)

Author: jbrockmendel

pandas/tests/frame/methods/test_drop.py

@@ -420,3 +420,24 @@ def test_drop_preserve_names(self):
 
         result = df.drop([(0, 2)])
         assert result.index.names == ("one", "two")
+
+    @pytest.mark.parametrize(
+        "operation", ["__iadd__", "__isub__", "__imul__", "__ipow__"]
+    )
+    @pytest.mark.parametrize("inplace", [False, True])
+    def test_inplace_drop_and_operation(self, operation, inplace):
+        # GH#30484
+        df = pd.DataFrame({"x": range(5)})
+        expected = df.copy()
+        df["y"] = range(5)
+        y = df["y"]
+
+        with tm.assert_produces_warning(None):
+            if inplace:
+                df.drop("y", axis=1, inplace=inplace)
+            else:
+                df = df.drop("y", axis=1, inplace=inplace)
+
+            # Perform operation and check result
+            getattr(y, operation)(1)
+            tm.assert_frame_equal(df, expected)

pandas/tests/frame/test_axis_select_reindex.py

@@ -488,24 +488,3 @@ def test_reindex_multi_categorical_time(self):
         result = df2.reindex(midx)
         expected = pd.DataFrame({"a": [0, 1, 2, 3, 4, 5, 6, np.nan, 8]}, index=midx)
         tm.assert_frame_equal(result, expected)
-
-    @pytest.mark.parametrize(
-        "operation", ["__iadd__", "__isub__", "__imul__", "__ipow__"]
-    )
-    @pytest.mark.parametrize("inplace", [False, True])
-    def test_inplace_drop_and_operation(self, operation, inplace):
-        # GH 30484
-        df = pd.DataFrame({"x": range(5)})
-        expected = df.copy()
-        df["y"] = range(5)
-        y = df["y"]
-
-        with tm.assert_produces_warning(None):
-            if inplace:
-                df.drop("y", axis=1, inplace=inplace)
-            else:
-                df = df.drop("y", axis=1, inplace=inplace)
-
-            # Perform operation and check result
-            getattr(y, operation)(1)
-            tm.assert_frame_equal(df, expected)

pandas/tests/frame/test_constructors.py

@@ -2677,6 +2677,13 @@ def test_with_mismatched_index_length_raises(self):
         with pytest.raises(ValueError, match="Shape of passed values"):
             DataFrame(dti, index=range(4))
 
+    def test_frame_ctor_datetime64_column(self):
+        rng = date_range("1/1/2000 00:00:00", "1/1/2000 1:59:50", freq="10s")
+        dates = np.asarray(rng)
+
+        df = DataFrame({"A": np.random.randn(len(rng)), "B": dates})
+        assert np.issubdtype(df["B"].dtype, np.dtype("M8[ns]"))
+
 
 class TestDataFrameConstructorWithDatetimeTZ:
     def test_from_dict(self):

pandas/tests/frame/test_operators.py renamed to pandas/tests/frame/test_logical_ops.py

@@ -1,18 +1,11 @@
 import numpy as np
 
 import pandas as pd
-from pandas import DataFrame, date_range, to_datetime
+from pandas import DataFrame, to_datetime
 import pandas._testing as tm
 
 
 class TestDataFrameTimeSeriesMethods:
-    def test_frame_ctor_datetime64_column(self):
-        rng = date_range("1/1/2000 00:00:00", "1/1/2000 1:59:50", freq="10s")
-        dates = np.asarray(rng)
-
-        df = DataFrame({"A": np.random.randn(len(rng)), "B": dates})
-        assert np.issubdtype(df["B"].dtype, np.dtype("M8[ns]"))
-
     def test_frame_append_datetime64_col_other_units(self):
         n = 100