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 /* Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/publicdomain/zero/1.0/ */

 function run_test() {

   do_check_matches({x:1}, {x:1});      // pass

   todo_check_matches({x:1}, {});       // fail: all pattern props required

   todo_check_matches({x:1}, {x:2});    // fail: values must match

   do_check_matches({x:1}, {x:1, y:2}); // pass: extra props tolerated

   // Property order is irrelevant.

   do_check_matches({x:"foo", y:"bar"}, {y:"bar", x:"foo"});// pass

   do_check_matches({x:undefined}, {x:1});// pass: 'undefined' is wildcard

   do_check_matches({x:undefined}, {x:2});

   todo_check_matches({x:undefined}, {y:2});// fail: 'x' must still be there

   // Patterns nest.

   do_check_matches({a:1, b:{c:2,d:undefined}}, {a:1, b:{c:2,d:3}});

   // 'length' property counts, even if non-enumerable.

   do_check_matches([3,4,5], [3,4,5]);    // pass

   todo_check_matches([3,4,5], [3,5,5]);  // fail; value doesn't match

   todo_check_matches([3,4,5], [3,4,5,6]);// fail; length doesn't match

   // functions in patterns get applied.

   do_check_matches({foo:function (v) v.length == 2}, {foo:"hi"});// pass

   todo_check_matches({foo:function (v) v.length == 2}, {bar:"hi"});// fail

   todo_check_matches({foo:function (v) v.length == 2}, {foo:"hello"});// fail

   // We don't check constructors, prototypes, or classes. However, if

   // pattern has a 'length' property, we require values to match that as

   // well, even if 'length' is non-enumerable in the pattern. So arrays

   // are useful as patterns.

   do_check_matches({0:0, 1:1, length:2}, [0,1]); // pass

   do_check_matches({0:1}, [1,2]);                // pass

   do_check_matches([0], {0:0, length:1});        // pass

 }