michael@0: // This file was written by Andy Wingo <wingo@igalia.com> and originally
michael@0: // contributed to V8 as generators-objects.js, available here:
michael@0: //
michael@0: // http://code.google.com/p/v8/source/browse/branches/bleeding_edge/test/mjsunit/harmony/generators-objects.js
michael@0: 
michael@0: // Test aspects of the generator runtime.
michael@0: 
michael@0: 
michael@0: var GeneratorFunction = (function*(){yield 1;}).constructor;
michael@0: 
michael@0: 
michael@0: function TestGeneratorResultPrototype() {
michael@0:     function* g() { yield 1; }
michael@0:     var iter = g();
michael@0:     assertIteratorNext(iter, 1);
michael@0:     assertIteratorDone(iter, undefined);
michael@0:     assertIteratorDone(iter, undefined);
michael@0: }
michael@0: TestGeneratorResultPrototype();
michael@0: 
michael@0: function TestGenerator(g, expected_values_for_next,
michael@0:                        send_val, expected_values_for_send) {
michael@0:     function testNext(thunk) {
michael@0:         var iter = thunk();
michael@0:         for (var i = 0; i < expected_values_for_next.length; i++) {
michael@0:             assertIteratorResult(iter.next(), expected_values_for_next[i],
michael@0:                                  i == expected_values_for_next.length - 1);
michael@0:         }
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     function testSend(thunk) {
michael@0:         var iter = thunk();
michael@0:         for (var i = 0; i < expected_values_for_send.length; i++) {
michael@0:             assertIteratorResult(i ? iter.next(send_val) : iter.next(),
michael@0:                                  expected_values_for_send[i],
michael@0:                                  i == expected_values_for_send.length - 1);
michael@0:         }
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     function testThrow(thunk) {
michael@0:         for (var i = 0; i < expected_values_for_next.length; i++) {
michael@0:             var iter = thunk();
michael@0:             for (var j = 0; j < i; j++) {
michael@0:                 assertIteratorResult(iter.next(),
michael@0:                                      expected_values_for_next[j],
michael@0:                                      j == expected_values_for_next.length - 1);
michael@0:             }
michael@0:             var Sentinel = function () {}
michael@0:             assertThrowsInstanceOf(function () { iter.throw(new Sentinel); }, Sentinel);
michael@0:             assertIteratorDone(iter, undefined);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     testNext(g);
michael@0:     testSend(g);
michael@0:     testThrow(g);
michael@0: 
michael@0:     testNext(function*() { return yield* g(); });
michael@0:     testSend(function*() { return yield* g(); });
michael@0:     testThrow(function*() { return yield* g(); });
michael@0: 
michael@0:     if (g instanceof GeneratorFunction) {
michael@0:         testNext(function() { return new g(); });
michael@0:         testSend(function() { return new g(); });
michael@0:         testThrow(function() { return new g(); });
michael@0:     }
michael@0: }
michael@0: 
michael@0: TestGenerator(function* g1() { },
michael@0:               [undefined],
michael@0:               "foo",
michael@0:               [undefined]);
michael@0: 
michael@0: TestGenerator(function* g2() { yield 1; },
michael@0:               [1, undefined],
michael@0:               "foo",
michael@0:               [1, undefined]);
michael@0: 
michael@0: TestGenerator(function* g3() { yield 1; yield 2; },
michael@0:               [1, 2, undefined],
michael@0:               "foo",
michael@0:               [1, 2, undefined]);
michael@0: 
michael@0: TestGenerator(function* g4() { yield 1; yield 2; return 3; },
michael@0:               [1, 2, 3],
michael@0:               "foo",
michael@0:               [1, 2, 3]);
michael@0: 
michael@0: TestGenerator(function* g5() { return 1; },
michael@0:               [1],
michael@0:               "foo",
michael@0:               [1]);
michael@0: 
michael@0: TestGenerator(function* g6() { var x = yield 1; return x; },
michael@0:               [1, undefined],
michael@0:               "foo",
michael@0:               [1, "foo"]);
michael@0: 
michael@0: TestGenerator(function* g7() { var x = yield 1; yield 2; return x; },
michael@0:               [1, 2, undefined],
michael@0:               "foo",
michael@0:               [1, 2, "foo"]);
michael@0: 
michael@0: TestGenerator(function* g8() { for (var x = 0; x < 4; x++) { yield x; } },
michael@0:               [0, 1, 2, 3, undefined],
michael@0:               "foo",
michael@0:               [0, 1, 2, 3, undefined]);
michael@0: 
michael@0: // Generator with arguments.
michael@0: TestGenerator(
michael@0:     function g9() {
michael@0:         return (function*(a, b, c, d) {
michael@0:             yield a; yield b; yield c; yield d;
michael@0:         })("fee", "fi", "fo", "fum");
michael@0:     },
michael@0:     ["fee", "fi", "fo", "fum", undefined],
michael@0:     "foo",
michael@0:     ["fee", "fi", "fo", "fum", undefined]);
michael@0: 
michael@0: // Too few arguments.
michael@0: TestGenerator(
michael@0:     function g10() {
michael@0:         return (function*(a, b, c, d) {
michael@0:             yield a; yield b; yield c; yield d;
michael@0:         })("fee", "fi");
michael@0:     },
michael@0:     ["fee", "fi", undefined, undefined, undefined],
michael@0:     "foo",
michael@0:     ["fee", "fi", undefined, undefined, undefined]);
michael@0: 
michael@0: // Too many arguments.
michael@0: TestGenerator(
michael@0:     function g11() {
michael@0:         return (function*(a, b, c, d) {
michael@0:             yield a; yield b; yield c; yield d;
michael@0:         })("fee", "fi", "fo", "fum", "I smell the blood of an Englishman");
michael@0:     },
michael@0:     ["fee", "fi", "fo", "fum", undefined],
michael@0:     "foo",
michael@0:     ["fee", "fi", "fo", "fum", undefined]);
michael@0: 
michael@0: // The arguments object.
michael@0: TestGenerator(
michael@0:     function g12() {
michael@0:         return (function*(a, b, c, d) {
michael@0:             for (var i = 0; i < arguments.length; i++) {
michael@0:                 yield arguments[i];
michael@0:             }
michael@0:         })("fee", "fi", "fo", "fum", "I smell the blood of an Englishman");
michael@0:     },
michael@0:     ["fee", "fi", "fo", "fum", "I smell the blood of an Englishman",
michael@0:      undefined],
michael@0:     "foo",
michael@0:     ["fee", "fi", "fo", "fum", "I smell the blood of an Englishman",
michael@0:      undefined]);
michael@0: 
michael@0: // Access to captured free variables.
michael@0: TestGenerator(
michael@0:     function g13() {
michael@0:         return (function(a, b, c, d) {
michael@0:             return (function*() {
michael@0:                 yield a; yield b; yield c; yield d;
michael@0:             })();
michael@0:         })("fee", "fi", "fo", "fum");
michael@0:     },
michael@0:     ["fee", "fi", "fo", "fum", undefined],
michael@0:     "foo",
michael@0:     ["fee", "fi", "fo", "fum", undefined]);
michael@0: 
michael@0: // Abusing the arguments object.
michael@0: TestGenerator(
michael@0:     function g14() {
michael@0:         return (function*(a, b, c, d) {
michael@0:             arguments[0] = "Be he live";
michael@0:             arguments[1] = "or be he dead";
michael@0:             arguments[2] = "I'll grind his bones";
michael@0:             arguments[3] = "to make my bread";
michael@0:             yield a; yield b; yield c; yield d;
michael@0:         })("fee", "fi", "fo", "fum");
michael@0:     },
michael@0:     ["Be he live", "or be he dead", "I'll grind his bones", "to make my bread",
michael@0:      undefined],
michael@0:     "foo",
michael@0:     ["Be he live", "or be he dead", "I'll grind his bones", "to make my bread",
michael@0:      undefined]);
michael@0: 
michael@0: // Abusing the arguments object: strict mode.
michael@0: TestGenerator(
michael@0:     function g15() {
michael@0:         return (function*(a, b, c, d) {
michael@0:             "use strict";
michael@0:             arguments[0] = "Be he live";
michael@0:             arguments[1] = "or be he dead";
michael@0:             arguments[2] = "I'll grind his bones";
michael@0:             arguments[3] = "to make my bread";
michael@0:             yield a; yield b; yield c; yield d;
michael@0:         })("fee", "fi", "fo", "fum");
michael@0:     },
michael@0:     ["fee", "fi", "fo", "fum", undefined],
michael@0:     "foo",
michael@0:     ["fee", "fi", "fo", "fum", undefined]);
michael@0: 
michael@0: // GC.
michael@0: if (typeof gc == 'function') {
michael@0:     TestGenerator(function* g16() { yield "baz"; gc(); yield "qux"; },
michael@0:                   ["baz", "qux", undefined],
michael@0:                   "foo",
michael@0:                   ["baz", "qux", undefined]);
michael@0: }
michael@0: 
michael@0: // Receivers.
michael@0: TestGenerator(
michael@0:     function g17() {
michael@0:         function* g() { yield this.x; yield this.y; }
michael@0:         var o = { start: g, x: 1, y: 2 };
michael@0:         return o.start();
michael@0:     },
michael@0:     [1, 2, undefined],
michael@0:     "foo",
michael@0:     [1, 2, undefined]);
michael@0: 
michael@0: // FIXME: Capture the generator object as "this" in new g().  Bug 907742.
michael@0: // TestGenerator(
michael@0: //     function g18() {
michael@0: //         function* g() { yield this.x; yield this.y; }
michael@0: //         var iter = new g;
michael@0: //         iter.x = 1;
michael@0: //         iter.y = 2;
michael@0: //         return iter;
michael@0: //     },
michael@0: //     [1, 2, undefined],
michael@0: //     "foo",
michael@0: //     [1, 2, undefined]);
michael@0: 
michael@0: TestGenerator(
michael@0:     function* g19() {
michael@0:         var x = 1;
michael@0:         yield x;
michael@0:         with({x:2}) { yield x; }
michael@0:         yield x;
michael@0:     },
michael@0:     [1, 2, 1, undefined],
michael@0:     "foo",
michael@0:     [1, 2, 1, undefined]);
michael@0: 
michael@0: TestGenerator(
michael@0:     function* g20() { yield (1 + (yield 2) + 3); },
michael@0:     [2, NaN, undefined],
michael@0:     "foo",
michael@0:     [2, "1foo3", undefined]);
michael@0: 
michael@0: TestGenerator(
michael@0:     function* g21() { return (1 + (yield 2) + 3); },
michael@0:     [2, NaN],
michael@0:     "foo",
michael@0:     [2, "1foo3"]);
michael@0: 
michael@0: TestGenerator(
michael@0:     function* g22() { yield (1 + (yield 2) + 3); yield (4 + (yield 5) + 6); },
michael@0:     [2, NaN, 5, NaN, undefined],
michael@0:     "foo",
michael@0:     [2, "1foo3", 5, "4foo6", undefined]);
michael@0: 
michael@0: TestGenerator(
michael@0:     function* g23() {
michael@0:         return (yield (1 + (yield 2) + 3)) + (yield (4 + (yield 5) + 6));
michael@0:     },
michael@0:     [2, NaN, 5, NaN, NaN],
michael@0:     "foo",
michael@0:     [2, "1foo3", 5, "4foo6", "foofoo"]);
michael@0: 
michael@0: // Rewind a try context with and without operands on the stack.
michael@0: TestGenerator(
michael@0:     function* g24() {
michael@0:         try {
michael@0:             return (yield (1 + (yield 2) + 3)) + (yield (4 + (yield 5) + 6));
michael@0:         } catch (e) {
michael@0:             throw e;
michael@0:         }
michael@0:     },
michael@0:     [2, NaN, 5, NaN, NaN],
michael@0:     "foo",
michael@0:     [2, "1foo3", 5, "4foo6", "foofoo"]);
michael@0: 
michael@0: // Yielding in a catch context, with and without operands on the stack.
michael@0: TestGenerator(
michael@0:     function* g25() {
michael@0:         try {
michael@0:             throw (yield (1 + (yield 2) + 3))
michael@0:         } catch (e) {
michael@0:             if (typeof e == 'object') throw e;
michael@0:             return e + (yield (4 + (yield 5) + 6));
michael@0:         }
michael@0:     },
michael@0:     [2, NaN, 5, NaN, NaN],
michael@0:     "foo",
michael@0:     [2, "1foo3", 5, "4foo6", "foofoo"]);
michael@0: 
michael@0: // Generator function instances.
michael@0: TestGenerator(GeneratorFunction(),
michael@0:               [undefined],
michael@0:               "foo",
michael@0:               [undefined]);
michael@0: 
michael@0: TestGenerator(new GeneratorFunction(),
michael@0:               [undefined],
michael@0:               "foo",
michael@0:               [undefined]);
michael@0: 
michael@0: TestGenerator(GeneratorFunction('yield 1;'),
michael@0:               [1, undefined],
michael@0:               "foo",
michael@0:               [1, undefined]);
michael@0: 
michael@0: TestGenerator(
michael@0:     function() { return GeneratorFunction('x', 'y', 'yield x + y;')(1, 2) },
michael@0:     [3, undefined],
michael@0:     "foo",
michael@0:     [3, undefined]);
michael@0: 
michael@0: // Access to this with formal arguments.
michael@0: TestGenerator(
michael@0:     function () {
michael@0:         return ({ x: 42, g: function* (a) { yield this.x } }).g(0);
michael@0:     },
michael@0:     [42, undefined],
michael@0:     "foo",
michael@0:     [42, undefined]);
michael@0: 
michael@0: function TestTryCatch(instantiate) {
michael@0:     function* g() { yield 1; try { yield 2; } catch (e) { yield e; } yield 3; }
michael@0:     function Sentinel() {}
michael@0: 
michael@0:     function Test1(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test1(instantiate(g));
michael@0: 
michael@0:     function Test2(iter) {
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test2(instantiate(g));
michael@0: 
michael@0:     function Test3(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test3(instantiate(g));
michael@0: 
michael@0:     function Test4(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         var exn = new Sentinel;
michael@0:         assertIteratorResult(iter.throw(exn), exn, false);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test4(instantiate(g));
michael@0: 
michael@0:     function Test5(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         var exn = new Sentinel;
michael@0:         assertIteratorResult(iter.throw(exn), exn, false);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0: 
michael@0:     }
michael@0:     Test5(instantiate(g));
michael@0: 
michael@0:     function Test6(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         var exn = new Sentinel;
michael@0:         assertIteratorResult(iter.throw(exn), exn, false);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test6(instantiate(g));
michael@0: }
michael@0: TestTryCatch(function (g) { return g(); });
michael@0: TestTryCatch(function* (g) { return yield* g(); });
michael@0: 
michael@0: function TestTryFinally(instantiate) {
michael@0:     function* g() { yield 1; try { yield 2; } finally { yield 3; } yield 4; }
michael@0:     function Sentinel() {}
michael@0:     function Sentinel2() {}
michael@0: 
michael@0:     function Test1(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorNext(iter, 4);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test1(instantiate(g));
michael@0: 
michael@0:     function Test2(iter) {
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test2(instantiate(g));
michael@0: 
michael@0:     function Test3(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test3(instantiate(g));
michael@0: 
michael@0:     function Test4(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorResult(iter.throw(new Sentinel), 3, false);
michael@0:         assertThrowsInstanceOf(function() { iter.next(); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0: 
michael@0:     }
michael@0:     Test4(instantiate(g));
michael@0: 
michael@0:     function Test5(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorResult(iter.throw(new Sentinel), 3, false);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel2); }, Sentinel2);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test5(instantiate(g));
michael@0: 
michael@0:     function Test6(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test6(instantiate(g));
michael@0: 
michael@0:     function Test7(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorNext(iter, 4);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test7(instantiate(g));
michael@0: }
michael@0: TestTryFinally(function (g) { return g(); });
michael@0: TestTryFinally(function* (g) { return yield* g(); });
michael@0: 
michael@0: function TestNestedTry(instantiate) {
michael@0:     function* g() {
michael@0:         try {
michael@0:             yield 1;
michael@0:             try { yield 2; } catch (e) { yield e; }
michael@0:             yield 3;
michael@0:         } finally {
michael@0:             yield 4;
michael@0:         }
michael@0:         yield 5;
michael@0:     }
michael@0:     function Sentinel() {}
michael@0:     function Sentinel2() {}
michael@0: 
michael@0:     function Test1(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorNext(iter, 4);
michael@0:         assertIteratorNext(iter, 5);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test1(instantiate(g));
michael@0: 
michael@0:     function Test2(iter) {
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test2(instantiate(g));
michael@0: 
michael@0:     function Test3(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorResult(iter.throw(new Sentinel), 4, false);
michael@0:         assertThrowsInstanceOf(function() { iter.next(); }, Sentinel);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test3(instantiate(g));
michael@0: 
michael@0:     function Test4(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorResult(iter.throw(new Sentinel), 4, false);
michael@0:         assertThrowsInstanceOf(function() { iter.throw(new Sentinel2); }, Sentinel2);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test4(instantiate(g));
michael@0: 
michael@0:     function Test5(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         var exn = new Sentinel;
michael@0:         assertIteratorResult(iter.throw(exn), exn, false);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorNext(iter, 4);
michael@0:         assertIteratorNext(iter, 5);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:         assertIteratorDone(iter, undefined);
michael@0: 
michael@0:     }
michael@0:     Test5(instantiate(g));
michael@0: 
michael@0:     function Test6(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         var exn = new Sentinel;
michael@0:         assertIteratorResult(iter.throw(exn), exn, false);
michael@0:         assertIteratorResult(iter.throw(new Sentinel2), 4, false);
michael@0:         assertThrowsInstanceOf(function() { iter.next(); }, Sentinel2);
michael@0:         assertIteratorDone(iter, undefined);
michael@0:     }
michael@0:     Test6(instantiate(g));
michael@0: 
michael@0:     function Test7(iter) {
michael@0:         assertIteratorNext(iter, 1);
michael@0:         assertIteratorNext(iter, 2);
michael@0:         var exn = new Sentinel;
michael@0:         assertIteratorResult(iter.throw(exn), exn, false);
michael@0:         assertIteratorNext(iter, 3);
michael@0:         assertIteratorResult(iter.throw(new Sentinel2), 4, false);
michael@0:         assertThrowsInstanceOf(function() { iter.next(); }, Sentinel2);
michael@0:         assertIteratorDone(iter, undefined);
michael@0: 
michael@0:     }
michael@0:     Test7(instantiate(g));
michael@0: 
michael@0:     // That's probably enough.
michael@0: }
michael@0: TestNestedTry(function (g) { return g(); });
michael@0: TestNestedTry(function* (g) { return yield* g(); });
michael@0: 
michael@0: function TestRecursion() {
michael@0:     function TestNextRecursion() {
michael@0:         function* g() { yield iter.next(); }
michael@0:         var iter = g();
michael@0:         return iter.next();
michael@0:     }
michael@0:     function TestSendRecursion() {
michael@0:         function* g() { yield iter.next(42); }
michael@0:         var iter = g();
michael@0:         return iter.next();
michael@0:     }
michael@0:     function TestThrowRecursion() {
michael@0:         function* g() { yield iter.throw(1); }
michael@0:         var iter = g();
michael@0:         return iter.next();
michael@0:     }
michael@0:     assertThrowsInstanceOf(TestNextRecursion, TypeError);
michael@0:     assertThrowsInstanceOf(TestSendRecursion, TypeError);
michael@0:     assertThrowsInstanceOf(TestThrowRecursion, TypeError);
michael@0: }
michael@0: TestRecursion();
michael@0: 
michael@0: if (typeof reportCompare == "function")
michael@0:     reportCompare(true, true);