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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --harmony-rest-parameters --harmony-arrow-functions
// Flags: --min-preparse-length=0
(function testRestIndex() {
assertEquals(5, ((...args) => args.length)(1,2,3,4,5));
assertEquals(4, ((a, ...args) => args.length)(1,2,3,4,5));
assertEquals(3, ((a, b, ...args) => args.length)(1,2,3,4,5));
assertEquals(2, ((a, b, c, ...args) => args.length)(1,2,3,4,5));
assertEquals(1, ((a, b, c, d, ...args) => args.length)(1,2,3,4,5));
assertEquals(0, ((a, b, c, d, e, ...args) => args.length)(1,2,3,4,5));
})();
// strictTest and sloppyTest should be called with descending natural
// numbers, as in:
//
// strictTest(6,5,4,3,2,1)
//
var strictTest = (function() {
"use strict";
return (a, b, ...c) => {
assertEquals(Array, c.constructor);
assertTrue(Array.isArray(c));
var expectedLength = (a === undefined) ? 0 : a - 2;
assertEquals(expectedLength, c.length);
for (var i = 2; i < a; ++i) {
assertEquals(c[i - 2], a - i);
}
};
})();
var sloppyTest = (a, b, ...c) => {
assertEquals(Array, c.constructor);
assertTrue(Array.isArray(c));
var expectedLength = (a === undefined) ? 0 : a - 2;
assertEquals(expectedLength, c.length);
for (var i = 2; i < a; ++i) {
assertEquals(c[i - 2], a - i);
}
};
var O = {
strict: strictTest,
sloppy: sloppyTest
};
(function testStrictRestParamArity() {
assertEquals(2, strictTest.length);
assertEquals(2, O.strict.length);
})();
(function testRestParamsStrictMode() {
strictTest();
strictTest(2, 1);
strictTest(6, 5, 4, 3, 2, 1);
strictTest(3, 2, 1);
O.strict();
O.strict(2, 1);
O.strict(6, 5, 4, 3, 2, 1);
O.strict(3, 2, 1);
})();
(function testRestParamsStrictModeApply() {
strictTest.apply(null, []);
strictTest.apply(null, [2, 1]);
strictTest.apply(null, [6, 5, 4, 3, 2, 1]);
strictTest.apply(null, [3, 2, 1]);
O.strict.apply(O, []);
O.strict.apply(O, [2, 1]);
O.strict.apply(O, [6, 5, 4, 3, 2, 1]);
O.strict.apply(O, [3, 2, 1]);
})();
(function testRestParamsStrictModeCall() {
strictTest.call(null);
strictTest.call(null, 2, 1);
strictTest.call(null, 6, 5, 4, 3, 2, 1);
strictTest.call(null, 3, 2, 1);
O.strict.call(O);
O.strict.call(O, 2, 1);
O.strict.call(O, 6, 5, 4, 3, 2, 1);
O.strict.call(O, 3, 2, 1);
})();
(function testsloppyRestParamArity() {
assertEquals(2, sloppyTest.length);
assertEquals(2, O.sloppy.length);
})();
(function testRestParamsSloppyMode() {
sloppyTest();
sloppyTest(2, 1);
sloppyTest(6, 5, 4, 3, 2, 1);
sloppyTest(3, 2, 1);
O.sloppy();
O.sloppy(2, 1);
O.sloppy(6, 5, 4, 3, 2, 1);
O.sloppy(3, 2, 1);
})();
(function testRestParamssloppyModeApply() {
sloppyTest.apply(null, []);
sloppyTest.apply(null, [2, 1]);
sloppyTest.apply(null, [6, 5, 4, 3, 2, 1]);
sloppyTest.apply(null, [3, 2, 1]);
O.sloppy.apply(O, []);
O.sloppy.apply(O, [2, 1]);
O.sloppy.apply(O, [6, 5, 4, 3, 2, 1]);
O.sloppy.apply(O, [3, 2, 1]);
})();
(function testRestParamssloppyModeCall() {
sloppyTest.call(null);
sloppyTest.call(null, 2, 1);
sloppyTest.call(null, 6, 5, 4, 3, 2, 1);
sloppyTest.call(null, 3, 2, 1);
O.sloppy.call(O);
O.sloppy.call(O, 2, 1);
O.sloppy.call(O, 6, 5, 4, 3, 2, 1);
O.sloppy.call(O, 3, 2, 1);
})();
(function testUnmappedArguments() {
// Normal functions make their arguments object unmapped, but arrow
// functions don't have an arguments object anyway. Check that the
// right thing happens for arguments in arrow functions with rest
// parameters.
assertSame(arguments, ((...rest) => arguments)());
})();
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