print("\n--- Test: property increment/decrement ---");

var o = {"v": 10};
o.v++;
assert(o.v == 11, "postfix inc on prop");
+o.v;
assert(o.v == 12, "prefix inc on prop");
o.v--;
assert(o.v == 11, "postfix dec on prop");
--o.v;
assert(o.v == 10, "prefix dec on prop");

print("property inc/dec: PASS");