--- a/test/test_run.py	Thu May 22 10:40:08 2008 +0000
+++ b/test/test_run.py	Thu May 22 12:44:43 2008 +0000
@@ -28,3 +28,23 @@
             self.assertEquals(exc.returncode, 1)
         else:
             self.fail("call did not raise an exception")
+
+    def test_call_extra_env(self):
+        """Test call with the extra_env parameter"""
+        subprocess_cmd = [sys.executable, "-c",
+                          "import sys, os;"
+                          "value = os.environ.get('TREEPKG_TEST');"
+                          "sys.exit(int(value != 'xyzzy'))"
+                          ]
+        # sanity check that the extra environment variable we use for
+        # the test is not set yet
+        self.assertRaises(SubprocessError, call, subprocess_cmd)
+
+        # the actual test
+        try:
+            call(subprocess_cmd, extra_env=dict(TREEPKG_TEST="xyzzy"))
+        except SubprocessError, exc:
+            self.fail("the extra_env variables were not set properly")
+        else:
+            # test OK
+            pass