Rewrite test using pytest.

setuptools/tests/fixtures.py

@@ -3,6 +3,7 @@ import pytest
 
 from . import contexts
 
+
 @pytest.yield_fixture
 def user_override():
     """
@@ -15,3 +16,9 @@ def user_override():
                 with mock.patch('site.USER_SITE', user_site):
                     with contexts.save_user_site_setting():
                         yield
+
+
+@pytest.yield_fixture
+def tmpdir_cwd(tmpdir):
+    with tmpdir.as_cwd() as orig:
+        yield orig

setuptools/tests/test_egg_info.py

@@ -2,22 +2,11 @@ import os
 import tempfile
 import shutil
 import stat
-import unittest
 
 from . import environment
 
 
-class TestEggInfo(unittest.TestCase):
-
-    def setUp(self):
-        self.test_dir = tempfile.mkdtemp()
-
-        self.old_cwd = os.getcwd()
-        os.chdir(self.test_dir)
-
-    def tearDown(self):
-        os.chdir(self.old_cwd)
-        shutil.rmtree(self.test_dir)
+class TestEggInfo:
 
     def _create_project(self):
         with open('setup.py', 'w') as f:
@@ -33,7 +22,7 @@ class TestEggInfo(unittest.TestCase):
             f.write('def run():\n')
             f.write("    print('hello')\n")
 
-    def test_egg_base_installed_egg_info(self):
+    def test_egg_base_installed_egg_info(self, tmpdir_cwd):
         self._create_project()
         temp_dir = tempfile.mkdtemp(prefix='setuptools-test.')
         os.chmod(temp_dir, stat.S_IRWXU)
@@ -54,7 +43,7 @@ class TestEggInfo(unittest.TestCase):
                     '--install-lib', paths['lib'],
                     '--install-scripts', paths['scripts'],
                     '--install-data', paths['data']],
-                pypath=os.pathsep.join([paths['lib'], self.old_cwd]),
+                pypath=os.pathsep.join([paths['lib'], str(tmpdir_cwd)]),
                 data_stream=1,
                 env=environ)
             if code:
@@ -63,17 +52,15 @@ class TestEggInfo(unittest.TestCase):
             for dirpath, dirnames, filenames in os.walk(paths['lib']):
                 if os.path.basename(dirpath) == 'EGG-INFO':
                     egg_info = sorted(filenames)
-            self.assertEqual(
-                egg_info,
-                ['PKG-INFO',
-                 'SOURCES.txt',
-                 'dependency_links.txt',
-                 'entry_points.txt',
-                 'not-zip-safe',
-                 'top_level.txt'])
+
+            expected = [
+                'PKG-INFO',
+                'SOURCES.txt',
+                'dependency_links.txt',
+                'entry_points.txt',
+                'not-zip-safe',
+                'top_level.txt',
+            ]
+            assert egg_info == expected
         finally:
             shutil.rmtree(temp_dir)
-
-
-def test_suite():
-    return unittest.defaultTestLoader.loadTestsFromName(__name__)