Rewrite test_dist_info using pytest fixtures.

setuptools/tests/test_dist_info.py

@@ -14,10 +14,47 @@ from .textwrap import DALS
 
 class TestDistInfo:
 
-    def test_distinfo(self):
+    metadata_template = DALS("""
+        Metadata-Version: 1.2
+        Name: {name}
+        {version}
+        Requires-Dist: splort (==4)
+        Provides-Extra: baz
+        Requires-Dist: quux (>=1.1); extra == 'baz'
+        """)
+
+    @pytest.fixture
+    def metadata(self, tmpdir):
+        dist_info_name = 'VersionedDistribution-2.718.dist-info'
+        versioned = tmpdir / dist_info_name
+        versioned.mkdir()
+        filename = versioned / 'METADATA'
+        filename.write_text(
+            self.metadata_template.format(
+                name='VersionedDistribution',
+                version='',
+            ).replace('\n\n', '\n'),
+            encoding='utf-8',
+        )
+
+        dist_info_name = 'UnversionedDistribution.dist-info'
+        unversioned = tmpdir / dist_info_name
+        unversioned.mkdir()
+        filename = unversioned / 'METADATA'
+        filename.write_text(
+            self.metadata_template.format(
+                name='UnversionedDistribution',
+                version='Version: 0.3',
+            ),
+            encoding='utf-8',
+        )
+
+        return str(tmpdir)
+
+    def test_distinfo(self, metadata):
         dists = dict(
             (d.project_name, d)
-            for d in pkg_resources.find_distributions(self.tmpdir)
+            for d in pkg_resources.find_distributions(metadata)
         )
 
         assert len(dists) == 2, dists
@@ -28,46 +65,14 @@ class TestDistInfo:
         assert versioned.version == '2.718'  # from filename
         assert unversioned.version == '0.3'  # from METADATA
 
-    def test_conditional_dependencies(self):
+    def test_conditional_dependencies(self, metadata):
         specs = 'splort==4', 'quux>=1.1'
         requires = list(map(pkg_resources.Requirement.parse, specs))
 
-        for d in pkg_resources.find_distributions(self.tmpdir):
+        for d in pkg_resources.find_distributions(metadata):
             assert d.requires() == requires[:1]
             assert d.requires(extras=('baz',)) == [
                 requires[0],
-                pkg_resources.Requirement.parse('quux>=1.1;extra=="baz"')]
+                pkg_resources.Requirement.parse('quux>=1.1;extra=="baz"'),
+            ]
             assert d.extras == ['baz']
-
-    metadata_template = DALS("""
-        Metadata-Version: 1.2
-        Name: {name}
-        {version}
-        Requires-Dist: splort (==4)
-        Provides-Extra: baz
-        Requires-Dist: quux (>=1.1); extra == 'baz'
-        """)
-
-    def setup_method(self, method):
-        self.tmpdir = tempfile.mkdtemp()
-        dist_info_name = 'VersionedDistribution-2.718.dist-info'
-        versioned = os.path.join(self.tmpdir, dist_info_name)
-        os.mkdir(versioned)
-        with open(os.path.join(versioned, 'METADATA'), 'w+') as metadata_file:
-            metadata = self.metadata_template.format(
-                name='VersionedDistribution',
-                version='',
-            ).replace('\n\n', '\n')
-            metadata_file.write(metadata)
-        dist_info_name = 'UnversionedDistribution.dist-info'
-        unversioned = os.path.join(self.tmpdir, dist_info_name)
-        os.mkdir(unversioned)
-        with open(os.path.join(unversioned, 'METADATA'), 'w+') as metadata_file:
-            metadata = self.metadata_template.format(
-                name='UnversionedDistribution',
-                version='Version: 0.3',
-            )
-            metadata_file.write(metadata)
-
-    def teardown_method(self, method):
-        shutil.rmtree(self.tmpdir)