// 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. (function TestDefaults() { function f1(x = 1) { return x } assertEquals(1, f1()); assertEquals(1, f1(undefined)); assertEquals(2, f1(2)); assertEquals(null, f1(null)); function f2(x, y = x) { return x + y; } assertEquals(8, f2(4)); assertEquals(8, f2(4, undefined)); assertEquals(6, f2(4, 2)); function f3(x = 1, y) { return x + y; } assertEquals(8, f3(5, 3)); assertEquals(3, f3(undefined, 2)); assertEquals(6, f3(4, 2)); function f4(x = () => 1) { return x() } assertEquals(1, f4()); assertEquals(1, f4(undefined)); assertEquals(2, f4(() => 2)); assertThrows(() => f4(null), TypeError); function f5(x, y = () => x) { return x + y(); } assertEquals(8, f5(4)); assertEquals(8, f5(4, undefined)); assertEquals(6, f5(4, () => 2)); function f6(x = {a: 1, m() { return 2 }}) { return x.a + x.m(); } assertEquals(3, f6()); assertEquals(3, f6(undefined)); assertEquals(5, f6({a: 2, m() { return 3 }})); var g1 = (x = 1) => { return x }; assertEquals(1, g1()); assertEquals(1, g1(undefined)); assertEquals(2, g1(2)); assertEquals(null, g1(null)); var g2 = (x, y = x) => { return x + y; }; assertEquals(8, g2(4)); assertEquals(8, g2(4, undefined)); assertEquals(6, g2(4, 2)); var g3 = (x = 1, y) => { return x + y; }; assertEquals(8, g3(5, 3)); assertEquals(3, g3(undefined, 2)); assertEquals(6, g3(4, 2)); var g4 = (x = () => 1) => { return x() }; assertEquals(1, g4()); assertEquals(1, g4(undefined)); assertEquals(2, g4(() => 2)); assertThrows(() => g4(null), TypeError); var g5 = (x, y = () => x) => { return x + y(); }; assertEquals(8, g5(4)); assertEquals(8, g5(4, undefined)); assertEquals(6, g5(4, () => 2)); var g6 = (x = {a: 1, m() { return 2 }}) => { return x.a + x.m(); }; assertEquals(3, g6()); assertEquals(3, g6(undefined)); assertEquals(5, g6({a: 2, m() { return 3 }})); }()); (function TestEvalInParameters() { function f1(x = eval(0)) { return x } assertEquals(0, f1()); function f2(x = () => eval(1)) { return x() } assertEquals(1, f2()); })(); (function TestParameterScopingSloppy() { var x = 1; function f1(a = x) { var x = 2; return a; } assertEquals(1, f1()); function f2(a = x) { function x() {}; return a; } assertEquals(1, f2()); function f3(a = eval("x")) { var x; return a; } assertEquals(1, f3()); function f31(a = eval("'use strict'; x")) { var x; return a; } assertEquals(1, f31()); function f4(a = function() { return x }) { var x; return a(); } assertEquals(1, f4()); function f5(a = () => x) { var x; return a(); } assertEquals(1, f5()); function f6(a = () => eval("x")) { var x; return a(); } assertEquals(1, f6()); function f61(a = () => { 'use strict'; return eval("x") }) { var x; return a(); } assertEquals(1, f61()); function f62(a = () => eval("'use strict'; x")) { var x; return a(); } assertEquals(1, f62()); var g1 = (a = x) => { var x = 2; return a; }; assertEquals(1, g1()); var g2 = (a = x) => { function x() {}; return a; }; assertEquals(1, g2()); var g3 = (a = eval("x")) => { var x; return a; }; assertEquals(1, g3()); var g31 = (a = eval("'use strict'; x")) => { var x; return a; }; assertEquals(1, g31()); var g4 = (a = function() { return x }) => { var x; return a(); }; assertEquals(1, g4()); var g5 = (a = () => x) => { var x; return a(); }; assertEquals(1, g5()); var g6 = (a = () => eval("x")) => { var x; return a(); }; assertEquals(1, g6()); var g61 = (a = () => { 'use strict'; return eval("x") }) => { var x; return a(); }; assertEquals(1, g61()); var g62 = (a = () => eval("'use strict'; x")) => { var x; return a(); }; assertEquals(1, g62()); var f11 = function f(x = f) { var f; return x; } assertSame(f11, f11()); var f12 = function f(x = f) { function f() {}; return x; } assertSame(f12, f12()); var f13 = function f(f = 7, x = f) { return x; } assertSame(7, f13()); var o1 = {f: function(x = this) { return x; }}; assertSame(o1, o1.f()); assertSame(1, o1.f(1)); })(); (function TestParameterScopingStrict() { "use strict"; var x = 1; function f1(a = x) { let x = 2; return a; } assertEquals(1, f1()); function f2(a = x) { const x = 2; return a; } assertEquals(1, f2()); function f3(a = x) { function x() {}; return a; } assertEquals(1, f3()); function f4(a = eval("x")) { var x; return a; } assertEquals(1, f4()); function f5(a = () => eval("x")) { var x; return a(); } assertEquals(1, f5()); var g1 = (a = x) => { let x = 2; return a; }; assertEquals(1, g1()); var g2 = (a = x) => { const x = 2; return a; }; assertEquals(1, g2()); var g3 = (a = x) => { function x() {}; return a; }; assertEquals(1, g3()); var g4 = (a = eval("x")) => { var x; return a; }; assertEquals(1, g4()); var g5 = (a = () => eval("x")) => { var x; return a(); }; assertEquals(1, g5()); var f11 = function f(x = f) { let f; return x; } assertSame(f11, f11()); var f12 = function f(x = f) { const f = 0; return x; } assertSame(f12, f12()); var f13 = function f(x = f) { function f() {}; return x; } assertSame(f13, f13()); })(); (function TestSloppyEvalScoping() { var x = 1; function f1(y = eval("var x = 2")) { with ({}) { return x; } } assertEquals(2, f1()); function f2(y = eval("var x = 2"), z = x) { return z; } assertEquals(2, f2()); assertEquals(1, f2(0)); function f3(y = eval("var x = 2"), z = eval("x")) { return z; } assertEquals(2, f3()); assertEquals(1, f3(0)); function f8(y = (eval("var x = 2"), x)) { return y; } assertEquals(2, f8()); assertEquals(0, f8(0)); function f11(z = eval("var y = 2")) { return y; } assertEquals(2, f11()); function f12(z = eval("var y = 2"), b = y) { return b; } assertEquals(2, f12()); function f13(z = eval("var y = 2"), b = eval("y")) { return b; } assertEquals(2, f13()); function f21(f = () => x) { eval("var x = 2"); return f() } assertEquals(1, f21()); assertEquals(3, f21(() => 3)); function f22(f = () => eval("x")) { eval("var x = 2"); return f() } assertEquals(1, f22()); assertEquals(3, f22(() => 3)); var g1 = (y = eval("var x = 2")) => { with ({}) { return x; } }; assertEquals(2, g1()); var g2 = (y = eval("var x = 2"), z = x) => { return z; }; assertEquals(2, g2()); assertEquals(1, g2(0)); var g3 = (y = eval("var x = 2"), z = eval("x")) => { return z; }; assertEquals(2, g3()); assertEquals(1, g3(0)); var g8 = (y = (eval("var x = 2"), x)) => { return y; }; assertEquals(2, g8()); assertEquals(0, g8(0)); var g11 = (z = eval("var y = 2")) => { return y; }; assertEquals(2, g11()); var g12 = (z = eval("var y = 2"), b = y) => { return b; }; assertEquals(2, g12()); var g13 = (z = eval("var y = 2"), b = eval("y")) => { return b; }; assertEquals(2, g13()); var g21 = (f = () => x) => { eval("var x = 2"); return f() }; assertEquals(1, g21()); assertEquals(3, g21(() => 3)); var g22 = (f = () => eval("x")) => { eval("var x = 2"); return f() }; assertEquals(1, g22()); assertEquals(3, g22(() => 3)); })(); (function TestStrictEvalScoping() { 'use strict'; var x = 1; function f1(y = eval("var x = 2")) { return x; } assertEquals(1, f1()); function f2(y = eval("var x = 2"), z = x) { return z; } assertEquals(1, f2()); assertEquals(1, f2(0)); function f3(y = eval("var x = 2"), z = eval("x")) { return z; } assertEquals(1, f3()); assertEquals(1, f3(0)); function f8(y = (eval("var x = 2"), x)) { return y; } assertEquals(1, f8()); assertEquals(0, f8(0)); function f11(z = eval("var y = 2")) { return y; } assertThrows(f11, ReferenceError); function f12(z = eval("var y = 2"), b = y) {} assertThrows(f12, ReferenceError); function f13(z = eval("var y = 2"), b = eval("y")) {} assertThrows(f13, ReferenceError); function f21(f = () => x) { eval("var x = 2"); return f() } assertEquals(1, f21()); assertEquals(3, f21(() => 3)); function f22(f = () => eval("x")) { eval("var x = 2"); return f() } assertEquals(1, f22()); assertEquals(3, f22(() => 3)); })(); (function TestParameterTDZSloppy() { function f1(a = x, x) { return a } assertThrows(() => f1(undefined, 4), ReferenceError); assertEquals(4, f1(4, 5)); function f2(a = eval("x"), x) { return a } assertThrows(() => f2(undefined, 4), ReferenceError); assertEquals(4, f2(4, 5)); function f3(a = eval("'use strict'; x"), x) { return a } assertThrows(() => f3(undefined, 4), ReferenceError); assertEquals(4, f3(4, 5)); function f4(a = () => x, x) { return a() } assertEquals(4, f4(() => 4, 5)); function f5(a = () => eval("x"), x) { return a() } assertEquals(4, f5(() => 4, 5)); function f6(a = () => eval("'use strict'; x"), x) { return a() } assertEquals(4, f6(() => 4, 5)); function f11(a = x, x = 2) { return a } assertThrows(() => f11(), ReferenceError); assertThrows(() => f11(undefined), ReferenceError); assertThrows(() => f11(undefined, 4), ReferenceError); assertEquals(4, f1(4, 5)); function f12(a = eval("x"), x = 2) { return a } assertThrows(() => f12(), ReferenceError); assertThrows(() => f12(undefined), ReferenceError); assertThrows(() => f12(undefined, 4), ReferenceError); assertEquals(4, f12(4, 5)); function f13(a = eval("'use strict'; x"), x = 2) { return a } assertThrows(() => f13(), ReferenceError); assertThrows(() => f13(undefined), ReferenceError); assertThrows(() => f13(undefined, 4), ReferenceError); assertEquals(4, f13(4, 5)); function f21(x = function() { return a }, ...a) { return x()[0] } assertEquals(4, f21(undefined, 4)); function f22(x = () => a, ...a) { return x()[0] } assertEquals(4, f22(undefined, 4)); function f23(x = () => eval("a"), ...a) { return x()[0] } assertEquals(4, f23(undefined, 4)); function f24(x = () => {'use strict'; return eval("a") }, ...a) { return x()[0] } assertEquals(4, f24(undefined, 4)); function f25(x = () => eval("'use strict'; a"), ...a) { return x()[0] } assertEquals(4, f25(undefined, 4)); var g1 = (x = function() { return a }, ...a) => { return x()[0] }; assertEquals(4, g1(undefined, 4)); var g2 = (x = () => a, ...a) => { return x()[0] }; assertEquals(4, g2(undefined, 4)); })(); (function TestParameterTDZStrict() { "use strict"; function f1(a = eval("x"), x) { return a } assertThrows(() => f1(undefined, 4), ReferenceError); assertEquals(4, f1(4, 5)); function f2(a = () => eval("x"), x) { return a() } assertEquals(4, f2(() => 4, 5)); function f11(a = eval("x"), x = 2) { return a } assertThrows(() => f11(), ReferenceError); assertThrows(() => f11(undefined), ReferenceError); assertThrows(() => f11(undefined, 4), ReferenceError); assertEquals(4, f11(4, 5)); function f21(x = () => eval("a"), ...a) { return x()[0] } assertEquals(4, f21(undefined, 4)); })(); (function TestArgumentsForNonSimpleParameters() { function f1(x = 900) { arguments[0] = 1; return x } assertEquals(9, f1(9)); assertEquals(900, f1()); function f2(x = 1001) { x = 2; return arguments[0] } assertEquals(10, f2(10)); assertEquals(undefined, f2()); }()); (function TestFunctionLength() { assertEquals(0, (function(x = 1) {}).length); assertEquals(0, (function(x = 1, ...a) {}).length); assertEquals(1, (function(x, y = 1) {}).length); assertEquals(1, (function(x, y = 1, ...a) {}).length); assertEquals(2, (function(x, y, z = 1) {}).length); assertEquals(2, (function(x, y, z = 1, ...a) {}).length); assertEquals(1, (function(x, y = 1, z) {}).length); assertEquals(1, (function(x, y = 1, z, ...a) {}).length); assertEquals(1, (function(x, y = 1, z, v = 2) {}).length); assertEquals(1, (function(x, y = 1, z, v = 2, ...a) {}).length); })(); (function TestDirectiveThrows() { "use strict"; assertThrows("(function(x=1){'use strict';})", SyntaxError); assertThrows("(x=1) => {'use strict';}", SyntaxError); assertThrows("(class{foo(x=1) {'use strict';}});", SyntaxError); assertThrows("(function(a, x=1){'use strict';})", SyntaxError); assertThrows("(a, x=1) => {'use strict';}", SyntaxError); assertThrows("(class{foo(a, x=1) {'use strict';}});", SyntaxError); assertThrows("(function({x}){'use strict';})", SyntaxError); assertThrows("({x}) => {'use strict';}", SyntaxError); assertThrows("(class{foo({x}) {'use strict';}});", SyntaxError); })();