Use PyContracts so we can declare/enforce parameter and return types.

This commit doesn't add any uses of PyContracts, but gets the machinery in
place.

1 files changed, 1 insertions, 0 deletions

diff --git a/igor.py b/igor.py
index 17f4114b..dced3d2e 100644
--- a/igor.py
+++ b/igor.py
@@ -60,6 +60,7 @@ def run_tests(tracer, *nose_args):
         print(msg)
         return
 
+    os.environ['COVERAGE_TESTING'] = "True"
     print_banner(label)
     nose_args = ["nosetests"] + list(nose_args)
     nose.core.main(argv=nose_args)