test: Use tmp_path pytest fixture over tmpdir (#2384)

* Use `tmp_path` over `tmpdir`.
* Use pathlib.Path functions now that paths and not files are being used.
   - Remove use of `.strpath`.
   - Update from `.join` to `.joinpath`.
   - For `json.loads` update from `.read` to `.read_text`.
   - For `json.load` update to use `.open`.
   - Update from `.write` to `.write_text` for patches.
   - Update from `.mkdir` to creating the path and then calling `.mkdir`.

tests/conftest.py

@@ -167,6 +167,6 @@ def datadir(tmp_path, request):
         dir_util.copy_tree(test_dir, str(tmp_path))
         # shutil is nicer, but doesn't work: https://bugs.python.org/issue20849
         # Once pyhf is Python 3.8+ only then the below can be used.
-        # shutil.copytree(test_dir, tmpdir)
+        # shutil.copytree(test_dir, tmp_path)
 
     return tmp_path

tests/contrib/test_contrib_utils.py

@@ -1,6 +1,5 @@
 import tarfile
 import zipfile
-from pathlib import Path
 from shutil import rmtree
 
 import pytest
@@ -10,70 +9,69 @@
 
 
 @pytest.fixture(scope="function")
-def tarfile_path(tmpdir):
-    with open(
-        tmpdir.join("test_file.txt").strpath, "w", encoding="utf-8"
-    ) as write_file:
+def tarfile_path(tmp_path):
+    with open(tmp_path.joinpath("test_file.txt"), "w", encoding="utf-8") as write_file:
         write_file.write("test file")
     with tarfile.open(
-        tmpdir.join("test_tar.tar.gz").strpath, mode="w:gz", encoding="utf-8"
+        tmp_path.joinpath("test_tar.tar.gz"), mode="w:gz", encoding="utf-8"
     ) as archive:
-        archive.add(tmpdir.join("test_file.txt").strpath)
-    return Path(tmpdir.join("test_tar.tar.gz").strpath)
+        archive.add(tmp_path.joinpath("test_file.txt"))
+    return tmp_path.joinpath("test_tar.tar.gz")
 
 
 @pytest.fixture(scope="function")
-def tarfile_uncompressed_path(tmpdir):
-    with open(
-        tmpdir.join("test_file.txt").strpath, "w", encoding="utf-8"
-    ) as write_file:
+def tarfile_uncompressed_path(tmp_path):
+    with open(tmp_path.joinpath("test_file.txt"), "w", encoding="utf-8") as write_file:
         write_file.write("test file")
     with tarfile.open(
-        tmpdir.join("test_tar.tar").strpath, mode="w", encoding="utf-8"
+        tmp_path.joinpath("test_tar.tar"), mode="w", encoding="utf-8"
     ) as archive:
-        archive.add(tmpdir.join("test_file.txt").strpath)
-    return Path(tmpdir.join("test_tar.tar").strpath)
+        archive.add(tmp_path.joinpath("test_file.txt"))
+    return tmp_path.joinpath("test_tar.tar")
 
 
 @pytest.fixture(scope="function")
-def zipfile_path(tmpdir):
-    with open(
-        tmpdir.join("test_file.txt").strpath, "w", encoding="utf-8"
-    ) as write_file:
+def zipfile_path(tmp_path):
+    with open(tmp_path.joinpath("test_file.txt"), "w", encoding="utf-8") as write_file:
         write_file.write("test file")
-    with zipfile.ZipFile(tmpdir.join("test_zip.zip").strpath, "w") as archive:
-        archive.write(tmpdir.join("test_file.txt").strpath)
-    return Path(tmpdir.join("test_zip.zip").strpath)
+    with zipfile.ZipFile(tmp_path.joinpath("test_zip.zip"), "w") as archive:
+        archive.write(tmp_path.joinpath("test_file.txt"))
+    return tmp_path.joinpath("test_zip.zip")
 
 
-def test_download_untrusted_archive_host(tmpdir, requests_mock):
+def test_download_untrusted_archive_host(tmp_path, requests_mock):
     archive_url = "https://www.pyhfthisdoesnotexist.org"
     requests_mock.get(archive_url)
 
     with pytest.raises(InvalidArchiveHost):
-        download(archive_url, tmpdir.join("likelihoods").strpath)
+        download(archive_url, tmp_path.joinpath("likelihoods"))
 
 
-def test_download_invalid_archive(tmpdir, requests_mock):
+def test_download_invalid_archive(tmp_path, requests_mock):
     archive_url = "https://www.hepdata.net/record/resource/1408476?view=true"
     requests_mock.get(archive_url, status_code=404)
 
     with pytest.raises(InvalidArchive):
-        download(archive_url, tmpdir.join("likelihoods").strpath)
+        download(archive_url, tmp_path.joinpath("likelihoods"))
 
 
-def test_download_compress(tmpdir, requests_mock):
+def test_download_compress(tmp_path, requests_mock):
     archive_url = "https://www.hepdata.net/record/resource/1408476?view=true"
     requests_mock.get(archive_url)
 
-    download(archive_url, tmpdir.join("likelihoods").strpath, compress=True)
+    download(archive_url, tmp_path.joinpath("likelihoods"), compress=True)
 
 
 def test_download_archive_type(
-    tmpdir, mocker, requests_mock, tarfile_path, tarfile_uncompressed_path, zipfile_path
+    tmp_path,
+    mocker,
+    requests_mock,
+    tarfile_path,
+    tarfile_uncompressed_path,
+    zipfile_path,
 ):
     archive_url = "https://www.hepdata.net/record/resource/1408476?view=true"
-    output_directory = tmpdir.join("likelihoods").strpath
+    output_directory = tmp_path.joinpath("likelihoods")
     # Give BytesIO a tarfile
     requests_mock.get(archive_url, content=open(tarfile_path, "rb").read())
     download(archive_url, output_directory)
@@ -86,7 +84,7 @@ def test_download_archive_type(
     requests_mock.get(archive_url, content=open(zipfile_path, "rb").read())
     # Run without and with existing output_directory to cover both
     # cases of the shutil.rmtree logic
-    rmtree(Path(output_directory))
+    rmtree(output_directory)
     download(archive_url, output_directory)  # without
     download(archive_url, output_directory)  # with
 
@@ -97,13 +95,13 @@ def test_download_archive_type(
         download(archive_url, output_directory)
 
 
-def test_download_archive_force(tmpdir, requests_mock, tarfile_path):
+def test_download_archive_force(tmp_path, requests_mock, tarfile_path):
     archive_url = "https://www.cern.ch/record/resource/123456789"
     requests_mock.get(
         archive_url, content=open(tarfile_path, "rb").read(), status_code=200
     )
 
     with pytest.raises(InvalidArchiveHost):
-        download(archive_url, tmpdir.join("likelihoods").strpath, force=False)
+        download(archive_url, tmp_path.joinpath("likelihoods"), force=False)
 
-    download(archive_url, tmpdir.join("likelihoods").strpath, force=True)
+    download(archive_url, tmp_path.joinpath("likelihoods"), force=True)

tests/test_examples.py

@@ -1,7 +1,7 @@
 import shlex
 
 
-def test_2bin_1channel(tmpdir, script_runner):
+def test_2bin_1channel(tmp_path, script_runner):
     command = f"pyhf inspect {'docs/examples/json/2-bin_1-channel.json':s}"
     ret = script_runner.run(shlex.split(command))
     assert ret.success

tests/test_infer.py

@@ -23,7 +23,7 @@ def check_uniform_type(in_list):
     )
 
 
-def test_toms748_scan(tmpdir, hypotest_args):
+def test_toms748_scan(tmp_path, hypotest_args):
     """
     Test the upper limit toms748 scan returns the correct structure and values
     """
@@ -166,7 +166,7 @@ def test_upper_limit_with_kwargs(hypotest_args):
     )
 
 
-def test_mle_fit_default(tmpdir, hypotest_args):
+def test_mle_fit_default(tmp_path, hypotest_args):
     """
     Check that the default return structure of pyhf.infer.mle.fit is as expected
     """
@@ -180,7 +180,7 @@ def test_mle_fit_default(tmpdir, hypotest_args):
     assert pyhf.tensorlib.shape(result) == (model.config.npars,)
 
 
-def test_mle_fit_return_fitted_val(tmpdir, hypotest_args):
+def test_mle_fit_return_fitted_val(tmp_path, hypotest_args):
     """
     Check that the return structure of pyhf.infer.mle.fit with the
     return_fitted_val keyword arg is as expected
@@ -196,7 +196,7 @@ def test_mle_fit_return_fitted_val(tmpdir, hypotest_args):
     assert pyhf.tensorlib.shape(result[1]) == ()
 
 
-def test_hypotest_default(tmpdir, hypotest_args):
+def test_hypotest_default(tmp_path, hypotest_args):
     """
     Check that the default return structure of pyhf.infer.hypotest is as expected
     """
@@ -209,7 +209,7 @@ def test_hypotest_default(tmpdir, hypotest_args):
     assert isinstance(result, type(tb.astensor(result)))
 
 
-def test_hypotest_poi_outofbounds(tmpdir, hypotest_args):
+def test_hypotest_poi_outofbounds(tmp_path, hypotest_args):
     """
     Check that the fit errors for POI outside of parameter bounds
     """
@@ -226,7 +226,7 @@ def test_hypotest_poi_outofbounds(tmpdir, hypotest_args):
 
 
 @pytest.mark.parametrize('test_stat', ['q0', 'q', 'qtilde'])
-def test_hypotest_return_tail_probs(tmpdir, hypotest_args, test_stat):
+def test_hypotest_return_tail_probs(tmp_path, hypotest_args, test_stat):
     """
     Check that the return structure of pyhf.infer.hypotest with the
     return_tail_probs keyword arg is as expected
@@ -243,7 +243,7 @@ def test_hypotest_return_tail_probs(tmpdir, hypotest_args, test_stat):
 
 
 @pytest.mark.parametrize('test_stat', ['q0', 'q', 'qtilde'])
-def test_hypotest_return_expected(tmpdir, hypotest_args, test_stat):
+def test_hypotest_return_expected(tmp_path, hypotest_args, test_stat):
     """
     Check that the return structure of pyhf.infer.hypotest with the
     addition of the return_expected keyword arg is as expected
@@ -265,7 +265,7 @@ def test_hypotest_return_expected(tmpdir, hypotest_args, test_stat):
 
 
 @pytest.mark.parametrize('test_stat', ['q0', 'q', 'qtilde'])
-def test_hypotest_return_expected_set(tmpdir, hypotest_args, test_stat):
+def test_hypotest_return_expected_set(tmp_path, hypotest_args, test_stat):
     """
     Check that the return structure of pyhf.infer.hypotest with the
     addition of the return_expected_set keyword arg is as expected
@@ -300,7 +300,7 @@ def test_hypotest_return_expected_set(tmpdir, hypotest_args, test_stat):
 @pytest.mark.parametrize('return_expected', [True, False])
 @pytest.mark.parametrize('return_expected_set', [True, False])
 def test_hypotest_return_calculator(
-    tmpdir,
+    tmp_path,
     hypotest_args,
     calctype,
     kwargs,
@@ -491,7 +491,7 @@ def test_significance_to_pvalue_roundtrip(backend):
     assert np.allclose(sigma, back_to_sigma, atol=0, rtol=rtol)
 
 
-def test_emperical_distribution(tmpdir, hypotest_args):
+def test_emperical_distribution(tmp_path, hypotest_args):
     """
     Check that the empirical distribution of the test statistic gives
     expected results
@@ -537,7 +537,7 @@ def test_emperical_distribution(tmpdir, hypotest_args):
     )
 
 
-def test_toy_calculator(tmpdir, hypotest_args):
+def test_toy_calculator(tmp_path, hypotest_args):
     """
     Check that the toy calculator is performing as expected
     """

tests/test_notebooks.py

@@ -11,8 +11,8 @@
 
 
 @pytest.fixture()
-def common_kwargs(tmpdir):
-    outputnb = tmpdir.join('output.ipynb')
+def common_kwargs(tmp_path):
+    outputnb = tmp_path.joinpath('output.ipynb')
     return {
         'output_path': str(outputnb),
         'kernel_name': f'python{sys.version_info.major}',