add simple venv test

Author: timfel

graalpython/com.oracle.graal.python.test/src/tests/test_venv.py

@@ -0,0 +1,20 @@
+import tempfile
+import sys
+import shutil
+import os
+import subprocess
+
+
+class VenvTest():
+    def setUp(self):
+        self.env_dir = os.path.realpath(tempfile.mkdtemp())
+
+    def tearDown(self):
+        shutil.rmtree(self.env_dir)
+
+    def test_create_and_use_basic_venv(self):
+        create = subprocess.check_output([sys.executable, "-m", "venv", self.env_dir, "--without-pip"])
+        assert create.decode() == "", create
+        run = subprocess.getoutput(". %s/bin/activate; python -m site" % self.env_dir)
+        assert "ENABLE_USER_SITE: False" in run, run
+        assert self.env_dir in run, run