tests: rework clean install test

Use pytest-virtualenv so the test can be run no Windows too.

1 files changed, 31 insertions, 0 deletions

diff --git a/setuptools/tests/test_virtualenv.py b/setuptools/tests/test_virtualenv.py
new file mode 100644
index 00000000..eb8db7a6
--- /dev/null
+++ b/setuptools/tests/test_virtualenv.py
@@ -0,0 +1,31 @@
+import os
+
+from pytest import yield_fixture
+from pytest_fixture_config import yield_requires_config
+
+import pytest_virtualenv
+
+
+@yield_requires_config(pytest_virtualenv.CONFIG, ['virtualenv_executable'])
+@yield_fixture(scope='function')
+def bare_virtualenv():
+    """ Bare virtualenv (no pip/setuptools/wheel).
+    """
+    with pytest_virtualenv.VirtualEnv(args=(
+        '--no-wheel',
+        '--no-pip',
+        '--no-setuptools',
+    )) as venv:
+        yield venv
+
+
+SOURCE_DIR = os.path.join(os.path.dirname(__file__), '../..')
+
+def test_clean_env_install(bare_virtualenv):
+    """
+    Check setuptools can be installed in a clean environment.
+    """
+    bare_virtualenv.run(' && '.join((
+        'cd {source}',
+        'python setup.py install',
+    )).format(source=SOURCE_DIR))