Ensure variables inside the venv

Author: jarshwah

tests/test_venv.py

@@ -573,6 +573,10 @@ def test_pythonpath_usage(self, newmocksession, monkeypatch):
         assert 'PYTHONPATH' not in os.environ
         mocksession.report.expect("warning", "*Discarding $PYTHONPATH from environment*")
 
+        l = mocksession._pcalls
+        assert len(l) == 1
+        assert 'PYTHONPATH' not in l[0].env
+
         # passenv = PYTHONPATH allows PYTHONPATH to stay in environment
         monkeypatch.setenv("PYTHONPATH", "/my/awesome/library")
         mocksession = newmocksession([], """
@@ -586,6 +590,10 @@ def test_pythonpath_usage(self, newmocksession, monkeypatch):
         assert 'PYTHONPATH' in os.environ
         mocksession.report.not_expect("warning", "*Discarding $PYTHONPATH from environment*")
 
+        l = mocksession._pcalls
+        assert len(l) == 2
+        assert l[1].env['PYTHONPATH'] == '/my/awesome/library'
+
 
 def test_env_variables_added_to_pcall(tmpdir, mocksession, newconfig, monkeypatch):
     pkg = tmpdir.ensure("package.tar.gz")