Pass the sys.path into the subprocess

If we're running tests via ``python setup.py test`` in a clean
environment then all of our dependencies are going to be installed
into either the current directory or the .eggs directory. However the
subprocess won't know to activate these dependencies, so we'll get it
to do so by passing our entire sys.path into the subprocess via the
PYTHONPATH environment variable.

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/hazmat/backends/test_openssl.py b/tests/hazmat/backends/test_openssl.py
index 2bf66a0c..0e4d75ed 100644
--- a/tests/hazmat/backends/test_openssl.py
+++ b/tests/hazmat/backends/test_openssl.py
@@ -234,9 +234,19 @@ class TestOpenSSLRandomEngine(object):
         )
         engine_name = tmpdir.join('engine_name')
 
+        # If we're running tests via ``python setup.py test`` in a clean
+        # environment then all of our dependencies are going to be installed
+        # into either the current directory or the .eggs directory. However the
+        # subprocess won't know to activate these dependencies, so we'll get it
+        # to do so by passing our entire sys.path into the subprocess via the
+        # PYTHONPATH environment variable.
+        env = os.environ.copy()
+        env["PYTHONPATH"] = os.pathsep.join(sys.path)
+
         with engine_name.open('w') as out:
             subprocess.check_call(
                 [sys.executable, "-c", engine_printer],
+                env=env,
                 stdout=out
             )