| // Copyright 2011 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. |
| |
| // Test for conflicting variable bindings. |
| |
| "use strict"; |
| |
| function CheckException(e) { |
| var string = e.toString(); |
| assertTrue(string.indexOf("has already been declared") >= 0 || |
| string.indexOf("redeclaration") >= 0); |
| return 'Conflict'; |
| } |
| |
| |
| function TestGlobal(s,e) { |
| try { |
| return eval(s + e); |
| } catch (x) { |
| return CheckException(x); |
| } |
| } |
| |
| |
| function TestFunction(s,e) { |
| try { |
| return eval("(function(){" + s + " return " + e + "})")(); |
| } catch (x) { |
| return CheckException(x); |
| } |
| } |
| |
| |
| function TestBlock(s,e) { |
| try { |
| return eval("(function(){ {" + s + "} return " + e + "})")(); |
| } catch (x) { |
| return CheckException(x); |
| } |
| } |
| |
| function TestAll(expected,s,opt_e) { |
| var e = ""; |
| var msg = s; |
| if (opt_e) { e = opt_e; msg += opt_e; } |
| assertEquals(expected === 'LocalConflict' ? 'NoConflict' : expected, |
| TestGlobal(s,e), "global:'" + msg + "'"); |
| assertEquals(expected === 'LocalConflict' ? 'NoConflict' : expected, |
| TestFunction(s,e), "function:'" + msg + "'"); |
| assertEquals(expected === 'LocalConflict' ? 'Conflict' : expected, |
| TestBlock(s,e), "block:'" + msg + "'"); |
| } |
| |
| |
| function TestConflict(s) { |
| TestAll('Conflict', s); |
| TestAll('Conflict', 'eval("' + s + '");'); |
| } |
| |
| function TestNoConflict(s) { |
| TestAll('NoConflict', s, "'NoConflict'"); |
| TestAll('NoConflict', 'eval("' + s + '");', "'NoConflict'"); |
| } |
| |
| function TestLocalConflict(s) { |
| TestAll('LocalConflict', s, "'NoConflict'"); |
| TestAll('NoConflict', 'eval("' + s + '");', "'NoConflict'"); |
| } |
| |
| var letbinds = [ "let x;", |
| "let x = 0;", |
| "let x = undefined;", |
| "let x = function() {};", |
| "let x, y;", |
| "let y, x;", |
| "const x = 0;", |
| "const x = undefined;", |
| "const x = function() {};", |
| "const x = 2, y = 3;", |
| "const y = 4, x = 5;", |
| "class x { }", |
| ]; |
| function forCompatible(bind) { |
| return !bind.startsWith('class'); |
| } |
| var varbinds = [ "var x;", |
| "var x = 0;", |
| "var x = undefined;", |
| "var x = function() {};", |
| "var x, y;", |
| "var y, x;", |
| ]; |
| var funbind = "function x() {}"; |
| |
| for (var l = 0; l < letbinds.length; ++l) { |
| // Test conflicting let/var bindings. |
| for (var v = 0; v < varbinds.length; ++v) { |
| // Same level. |
| TestConflict(letbinds[l] + varbinds[v]); |
| TestConflict(varbinds[v] + letbinds[l]); |
| // Different level. |
| TestConflict(letbinds[l] + '{' + varbinds[v] + '}'); |
| TestConflict('{' + varbinds[v] +'}' + letbinds[l]); |
| TestNoConflict(varbinds[v] + '{' + letbinds[l] + '}'); |
| TestNoConflict('{' + letbinds[l] + '}' + varbinds[v]); |
| // For loop. |
| if (forCompatible(letbinds[l])) { |
| TestConflict('for (' + letbinds[l] + '0;) {' + varbinds[v] + '}'); |
| } |
| TestNoConflict('for (' + varbinds[v] + '0;) {' + letbinds[l] + '}'); |
| } |
| |
| // Test conflicting let/let bindings. |
| for (var k = 0; k < letbinds.length; ++k) { |
| // Same level. |
| TestConflict(letbinds[l] + letbinds[k]); |
| TestConflict(letbinds[k] + letbinds[l]); |
| // Different level. |
| TestNoConflict(letbinds[l] + '{ ' + letbinds[k] + '}'); |
| TestNoConflict('{' + letbinds[k] +'} ' + letbinds[l]); |
| // For loop. |
| if (forCompatible(letbinds[l])) { |
| TestNoConflict('for (' + letbinds[l] + '0;) {' + letbinds[k] + '}'); |
| } |
| if (forCompatible(letbinds[k])) { |
| TestNoConflict('for (' + letbinds[k] + '0;) {' + letbinds[l] + '}'); |
| } |
| } |
| |
| // Test conflicting function/let bindings. |
| // Same level. |
| TestConflict(letbinds[l] + funbind); |
| TestConflict(funbind + letbinds[l]); |
| // Different level. |
| TestNoConflict(letbinds[l] + '{' + funbind + '}'); |
| TestNoConflict('{' + funbind + '}' + letbinds[l]); |
| TestNoConflict(funbind + '{' + letbinds[l] + '}'); |
| TestNoConflict('{' + letbinds[l] + '}' + funbind); |
| // For loop. |
| if (forCompatible(letbinds[l])) { |
| TestNoConflict('for (' + letbinds[l] + '0;) {' + funbind + '}'); |
| } |
| |
| // Test conflicting parameter/let bindings. |
| TestConflict('(function(x) {' + letbinds[l] + '})();'); |
| } |
| |
| // Test conflicting function/var bindings. |
| for (var v = 0; v < varbinds.length; ++v) { |
| // Same level. |
| TestLocalConflict(varbinds[v] + funbind); |
| TestLocalConflict(funbind + varbinds[v]); |
| // Different level. |
| TestLocalConflict(funbind + '{' + varbinds[v] + '}'); |
| TestLocalConflict('{' + varbinds[v] +'}' + funbind); |
| TestNoConflict(varbinds[v] + '{' + funbind + '}'); |
| TestNoConflict('{' + funbind + '}' + varbinds[v]); |
| // For loop. |
| TestNoConflict('for (' + varbinds[v] + '0;) {' + funbind + '}'); |
| } |
| |
| // Test conflicting catch/var bindings. |
| for (var v = 0; v < varbinds.length; ++v) { |
| TestNoConflict('try {} catch(x) {' + varbinds[v] + '}'); |
| } |
| |
| // Test conflicting parameter/var bindings. |
| for (var v = 0; v < varbinds.length; ++v) { |
| TestNoConflict('(function (x) {' + varbinds[v] + '})();'); |
| } |
| |
| // Test conflicting parameter/function bindings. |
| TestNoConflict('(function (x) {' + funbind + '})();'); |