done

lib/python3.11/site-packages/pandas/tests/frame/methods/test_swapaxes.py

@@ -0,0 +1,37 @@
+import numpy as np
+import pytest
+
+from pandas import DataFrame
+import pandas._testing as tm
+
+
+class TestSwapAxes:
+    def test_swapaxes(self):
+        df = DataFrame(np.random.default_rng(2).standard_normal((10, 5)))
+        msg = "'DataFrame.swapaxes' is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=msg):
+            tm.assert_frame_equal(df.T, df.swapaxes(0, 1))
+            tm.assert_frame_equal(df.T, df.swapaxes(1, 0))
+
+    def test_swapaxes_noop(self):
+        df = DataFrame(np.random.default_rng(2).standard_normal((10, 5)))
+        msg = "'DataFrame.swapaxes' is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=msg):
+            tm.assert_frame_equal(df, df.swapaxes(0, 0))
+
+    def test_swapaxes_invalid_axis(self):
+        df = DataFrame(np.random.default_rng(2).standard_normal((10, 5)))
+        msg = "'DataFrame.swapaxes' is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=msg):
+            msg = "No axis named 2 for object type DataFrame"
+            with pytest.raises(ValueError, match=msg):
+                df.swapaxes(2, 5)
+
+    def test_round_empty_not_input(self):
+        # GH#51032
+        df = DataFrame({"a": [1, 2]})
+        msg = "'DataFrame.swapaxes' is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=msg):
+            result = df.swapaxes("index", "index")
+        tm.assert_frame_equal(df, result)
+        assert df is not result