Replace all pytest tmpdir fixtures with tmp_path, to avoid deprecated…

… legacy_path

tests/test_ipynb.py

@@ -1,3 +1,4 @@
+import pathlib
 import re
 
 from click.testing import CliRunner
@@ -12,7 +13,6 @@
 import pytest
 from black import Mode
 from _pytest.monkeypatch import MonkeyPatch
-from py.path import local
 from tests.util import DATA_DIR
 
 pytestmark = pytest.mark.jupyter
@@ -371,52 +371,52 @@ def test_ipynb_diff_with_no_change() -> None:
 
 
 def test_cache_isnt_written_if_no_jupyter_deps_single(
-    monkeypatch: MonkeyPatch, tmpdir: local
+    monkeypatch: MonkeyPatch, tmp_path: pathlib.Path
 ) -> None:
     # Check that the cache isn't written to if Jupyter dependencies aren't installed.
     jupyter_dependencies_are_installed.cache_clear()
     nb = DATA_DIR / "notebook_trailing_newline.ipynb"
-    tmp_nb = tmpdir / "notebook.ipynb"
+    tmp_nb = tmp_path / "notebook.ipynb"
     with open(nb) as src, open(tmp_nb, "w") as dst:
         dst.write(src.read())
     monkeypatch.setattr(
         "black.jupyter_dependencies_are_installed", lambda verbose, quiet: False
     )
-    result = runner.invoke(main, [str(tmpdir / "notebook.ipynb")])
+    result = runner.invoke(main, [str(tmp_path / "notebook.ipynb")])
     assert "No Python files are present to be formatted. Nothing to do" in result.output
     jupyter_dependencies_are_installed.cache_clear()
     monkeypatch.setattr(
         "black.jupyter_dependencies_are_installed", lambda verbose, quiet: True
     )
-    result = runner.invoke(main, [str(tmpdir / "notebook.ipynb")])
+    result = runner.invoke(main, [str(tmp_path / "notebook.ipynb")])
     assert "reformatted" in result.output
 
 
 def test_cache_isnt_written_if_no_jupyter_deps_dir(
-    monkeypatch: MonkeyPatch, tmpdir: local
+    monkeypatch: MonkeyPatch, tmp_path: pathlib.Path
 ) -> None:
     # Check that the cache isn't written to if Jupyter dependencies aren't installed.
     jupyter_dependencies_are_installed.cache_clear()
     nb = DATA_DIR / "notebook_trailing_newline.ipynb"
-    tmp_nb = tmpdir / "notebook.ipynb"
+    tmp_nb = tmp_path / "notebook.ipynb"
     with open(nb) as src, open(tmp_nb, "w") as dst:
         dst.write(src.read())
     monkeypatch.setattr(
         "black.files.jupyter_dependencies_are_installed", lambda verbose, quiet: False
     )
-    result = runner.invoke(main, [str(tmpdir)])
+    result = runner.invoke(main, [str(tmp_path)])
     assert "No Python files are present to be formatted. Nothing to do" in result.output
     jupyter_dependencies_are_installed.cache_clear()
     monkeypatch.setattr(
         "black.files.jupyter_dependencies_are_installed", lambda verbose, quiet: True
     )
-    result = runner.invoke(main, [str(tmpdir)])
+    result = runner.invoke(main, [str(tmp_path)])
     assert "reformatted" in result.output
 
 
-def test_ipynb_flag(tmpdir: local) -> None:
+def test_ipynb_flag(tmp_path: pathlib.Path) -> None:
     nb = DATA_DIR / "notebook_trailing_newline.ipynb"
-    tmp_nb = tmpdir / "notebook.a_file_extension_which_is_definitely_not_ipynb"
+    tmp_nb = tmp_path / "notebook.a_file_extension_which_is_definitely_not_ipynb"
     with open(nb) as src, open(tmp_nb, "w") as dst:
         dst.write(src.read())
     result = runner.invoke(