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// 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.
// Flags: --no-legacy-const --harmony-sloppy --harmony-sloppy-let --harmony-sloppy-function
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; }
// TODO(littledan): Add tests using Realm.eval to ensure that global eval
// works as expected.
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 catch/function bindings.
TestNoConflict('try {} catch(x) {' + funbind + '}');
// Test conflicting parameter/function bindings.
TestNoConflict('(function (x) {' + funbind + '})();');
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