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+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-generators --expose-gc
+
+// Test generator iteration.
+
+var GeneratorFunction = (function*(){yield 1;}).__proto__.constructor;
+
+function TestGenerator(g, expected_values_for_next,
+ send_val, expected_values_for_send) {
+ function testNext(thunk) {
+ var iter = thunk();
+ for (var i = 0; i < expected_values_for_next.length; i++) {
+ assertEquals(expected_values_for_next[i], iter.next());
+ }
+ assertThrows(function() { iter.next(); }, Error);
+ }
+ function testSend(thunk) {
+ var iter = thunk();
+ for (var i = 0; i < expected_values_for_send.length; i++) {
+ assertEquals(expected_values_for_send[i], iter.send(send_val));
+ }
+ assertThrows(function() { iter.send(send_val); }, Error);
+ }
+ function testThrow(thunk) {
+ for (var i = 0; i < expected_values_for_next.length; i++) {
+ var iter = thunk();
+ for (var j = 0; j < i; j++) {
+ assertEquals(expected_values_for_next[j], iter.next());
+ }
+ function Sentinel() {}
+ assertThrows(function () { iter.throw(new Sentinel); }, Sentinel);
+ assertThrows(function () { iter.next(); }, Error);
+ }
+ }
+
+ testNext(g);
+ testSend(g);
+ testThrow(g);
+
+ if (g instanceof GeneratorFunction) {
+ testNext(function() { return new g(); });
+ testSend(function() { return new g(); });
+ testThrow(function() { return new g(); });
+ }
+}
+
+TestGenerator(function* g1() { },
+ [undefined],
+ "foo",
+ [undefined]);
+
+TestGenerator(function* g2() { yield 1; },
+ [1, undefined],
+ "foo",
+ [1, undefined]);
+
+TestGenerator(function* g3() { yield 1; yield 2; },
+ [1, 2, undefined],
+ "foo",
+ [1, 2, undefined]);
+
+TestGenerator(function* g4() { yield 1; yield 2; return 3; },
+ [1, 2, 3],
+ "foo",
+ [1, 2, 3]);
+
+TestGenerator(function* g5() { return 1; },
+ [1],
+ "foo",
+ [1]);
+
+TestGenerator(function* g6() { var x = yield 1; return x; },
+ [1, undefined],
+ "foo",
+ [1, "foo"]);
+
+TestGenerator(function* g7() { var x = yield 1; yield 2; return x; },
+ [1, 2, undefined],
+ "foo",
+ [1, 2, "foo"]);
+
+TestGenerator(function* g8() { for (var x = 0; x < 4; x++) { yield x; } },
+ [0, 1, 2, 3, undefined],
+ "foo",
+ [0, 1, 2, 3, undefined]);
+
+// Generator with arguments.
+TestGenerator(
+ function g9() {
+ return (function*(a, b, c, d) {
+ yield a; yield b; yield c; yield d;
+ })("fee", "fi", "fo", "fum");
+ },
+ ["fee", "fi", "fo", "fum", undefined],
+ "foo",
+ ["fee", "fi", "fo", "fum", undefined]);
+
+// Too few arguments.
+TestGenerator(
+ function g10() {
+ return (function*(a, b, c, d) {
+ yield a; yield b; yield c; yield d;
+ })("fee", "fi");
+ },
+ ["fee", "fi", undefined, undefined, undefined],
+ "foo",
+ ["fee", "fi", undefined, undefined, undefined]);
+
+// Too many arguments.
+TestGenerator(
+ function g11() {
+ return (function*(a, b, c, d) {
+ yield a; yield b; yield c; yield d;
+ })("fee", "fi", "fo", "fum", "I smell the blood of an Englishman");
+ },
+ ["fee", "fi", "fo", "fum", undefined],
+ "foo",
+ ["fee", "fi", "fo", "fum", undefined]);
+
+// The arguments object.
+TestGenerator(
+ function g12() {
+ return (function*(a, b, c, d) {
+ for (var i = 0; i < arguments.length; i++) {
+ yield arguments[i];
+ }
+ })("fee", "fi", "fo", "fum", "I smell the blood of an Englishman");
+ },
+ ["fee", "fi", "fo", "fum", "I smell the blood of an Englishman",
+ undefined],
+ "foo",
+ ["fee", "fi", "fo", "fum", "I smell the blood of an Englishman",
+ undefined]);
+
+// Access to captured free variables.
+TestGenerator(
+ function g13() {
+ return (function(a, b, c, d) {
+ return (function*() {
+ yield a; yield b; yield c; yield d;
+ })();
+ })("fee", "fi", "fo", "fum");
+ },
+ ["fee", "fi", "fo", "fum", undefined],
+ "foo",
+ ["fee", "fi", "fo", "fum", undefined]);
+
+// Abusing the arguments object.
+TestGenerator(
+ function g14() {
+ return (function*(a, b, c, d) {
+ arguments[0] = "Be he live";
+ arguments[1] = "or be he dead";
+ arguments[2] = "I'll grind his bones";
+ arguments[3] = "to make my bread";
+ yield a; yield b; yield c; yield d;
+ })("fee", "fi", "fo", "fum");
+ },
+ ["Be he live", "or be he dead", "I'll grind his bones", "to make my bread",
+ undefined],
+ "foo",
+ ["Be he live", "or be he dead", "I'll grind his bones", "to make my bread",
+ undefined]);
+
+// Abusing the arguments object: strict mode.
+TestGenerator(
+ function g15() {
+ return (function*(a, b, c, d) {
+ "use strict";
+ arguments[0] = "Be he live";
+ arguments[1] = "or be he dead";
+ arguments[2] = "I'll grind his bones";
+ arguments[3] = "to make my bread";
+ yield a; yield b; yield c; yield d;
+ })("fee", "fi", "fo", "fum");
+ },
+ ["fee", "fi", "fo", "fum", undefined],
+ "foo",
+ ["fee", "fi", "fo", "fum", undefined]);
+
+// GC.
+TestGenerator(function* g16() { yield "baz"; gc(); yield "qux"; },
+ ["baz", "qux", undefined],
+ "foo",
+ ["baz", "qux", undefined]);
+
+// Receivers.
+TestGenerator(
+ function g17() {
+ function* g() { yield this.x; yield this.y; }
+ var o = { start: g, x: 1, y: 2 };
+ return o.start();
+ },
+ [1, 2, undefined],
+ "foo",
+ [1, 2, undefined]);
+
+TestGenerator(
+ function g18() {
+ function* g() { yield this.x; yield this.y; }
+ var iter = new g;
+ iter.x = 1;
+ iter.y = 2;
+ return iter;
+ },
+ [1, 2, undefined],
+ "foo",
+ [1, 2, undefined]);
+
+TestGenerator(
+ function* g() {
+ var x = 1;
+ yield x;
+ with({x:2}) { yield x; }
+ yield x;
+ },
+ [1, 2, 1, undefined],
+ "foo",
+ [1, 2, 1, undefined]);
+
+function TestRecursion() {
+ function TestNextRecursion() {
+ function* g() { yield iter.next(); }
+ var iter = g();
+ return iter.next();
+ }
+ function TestSendRecursion() {
+ function* g() { yield iter.send(42); }
+ var iter = g();
+ return iter.next();
+ }
+ function TestThrowRecursion() {
+ function* g() { yield iter.throw(1); }
+ var iter = g();
+ return iter.next();
+ }
+ assertThrows(TestNextRecursion, Error);
+ assertThrows(TestSendRecursion, Error);
+ assertThrows(TestThrowRecursion, Error);
+}
+TestRecursion();