Capture errors on trying to open file URIs

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/testing.py b/tests/testing.py
index d70ded6..c5013dc 100644
--- a/tests/testing.py
+++ b/tests/testing.py
@@ -7,3 +7,12 @@ from nose.tools import nottest
 def test_path(path):
     this_dir = os.path.dirname(__file__)
     return os.path.join(this_dir, "test-data", path)
+
+
+def assert_raises(exception, func):
+    try:
+        func()
+        assert False, "Expected " + exception.__name__
+    except exception as error:
+        return error
+