Add unit tests involving sparse bit offset enumerations.

Test encoding and decoding with non-contiguous bit offsets.

Author: acolomb

test/test_od.py

@@ -248,6 +248,16 @@ def test_bits(self):
         with self.assertRaises(KeyError):
             var.encode_bits(0, "DOES NOT EXIST", 0)
 
+    def test_bits_sparse(self):
+        var = od.ODVariable("Test UNSIGNED8", 0x1000)
+        var.data_type = od.UNSIGNED8
+
+        self.assertEqual(var.decode_bits(0b11111111, [2, 5]), 0b1001)
+        self.assertEqual(var.decode_bits(0b11011011, [2, 5]), 0)
+        self.assertEqual(var.encode_bits(0b11111111, [2, 5], 0), 0b11011011)
+        self.assertEqual(var.encode_bits(0b00000000, [2, 5], 0b1001), 0b00100100)
+        self.assertEqual(var.encode_bits(0b00000000, [2, 5], 0b1111), 0b00100100)
+
 
 class TestObjectDictionary(unittest.TestCase):