1 files changed, 21 insertions, 0 deletions
diff --git a/tests/io_sig_test.py b/tests/io_sig_test.py
new file mode 100644
index 0000000..3cd90bf
--- /dev/null
+++ b/tests/io_sig_test.py
@@ -0,0 +1,21 @@
+# Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+import unittest
+import gras
+
+class IOSigTest(unittest.TestCase):
+
+    def test_io_sig(self):
+        io = gras.IOSignature()
+        self.assertEqual(len(io), 0)
+
+    def test_io_sig_extend(self):
+        io = gras.IOSignature([5, 6, 7])
+        self.assertEqual(len(io), 3)
+        self.assertEqual(io[0], 5)
+        self.assertEqual(io[1], 6)
+        self.assertEqual(io[2], 7)
+        self.assertEqual(io[3], 7) #auto extend
+
+if __name__ == '__main__':
+    unittest.main()