v8/test/mjsunit/harmony/block-conflicts.js

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// Copyright 2011 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-scoping
// Test for conflicting variable bindings.
// TODO(ES6): properly activate extended mode
"use strict";
function CheckException(e) {
var string = e.toString();
assertTrue(string.indexOf("has already been declared") >= 0 ||
string.indexOf("redeclaration") >= 0);
return 'Conflict';
}
function TestFunction(s,e) {
try {
return eval("(function(){" + s + ";return " + e + "})")();
} catch (x) {
return CheckException(x);
}
}
function TestBlock(s,e) {
try {
return eval("(function(){ if (true) { " + 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, TestFunction(s,e), "function:'" + msg + "'");
assertEquals(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'");
}
var letbinds = [ "let x",
"let x = 0",
"let x = undefined",
"function x() { }",
"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",
];
var varbinds = [ "var x",
"var x = 0",
"var x = undefined",
"var x = function() {}",
"var x, y",
"var y, 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]);
}
// 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]);
}
// Test conflicting parameter/let bindings.
TestConflict('(function (x) { ' + letbinds[l] + '; })()');
}
// Test conflicting catch/var bindings.
for (var v = 0; v < varbinds.length; ++v) {
TestConflict('try {} catch (x) { ' + varbinds[v] + '; }');
}
// Test conflicting parameter/var bindings.
for (var v = 0; v < varbinds.length; ++v) {
TestNoConflict('(function (x) { ' + varbinds[v] + '; })()');
}