v8/test/mjsunit/object-literal.js

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// Copyright 2009 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.
var obj = {
a: 7,
b: { x: 12, y: 24 },
c: 'Zebra'
}
assertEquals(7, obj.a);
assertEquals(12, obj.b.x);
assertEquals(24, obj.b.y);
assertEquals('Zebra', obj.c);
var z = 24;
var obj2 = {
a: 7,
b: { x: 12, y: z },
c: 'Zebra'
}
assertEquals(7, obj2.a);
assertEquals(12, obj2.b.x);
assertEquals(24, obj2.b.y);
assertEquals('Zebra', obj2.c);
var arr = [];
for (var i = 0; i < 2; i++) {
arr[i] = {
a: 7,
b: { x: 12, y: 24 },
c: 'Zebra'
}
}
arr[0].b.x = 2;
assertEquals(2, arr[0].b.x);
assertEquals(12, arr[1].b.x);
function makeSparseArray() {
return {
'0': { x: 12, y: 24 },
'1000000': { x: 0, y: 0 }
};
}
var sa1 = makeSparseArray();
sa1[0].x = 0;
var sa2 = makeSparseArray();
assertEquals(12, sa2[0].x);
// Test that non-constant literals work.
var n = new Object();
function makeNonConstantArray() { return [ [ n ] ]; }
var a = makeNonConstantArray();
a[0][0].foo = "bar";
assertEquals("bar", n.foo);
function makeNonConstantObject() { return { a: { b: n } }; }
a = makeNonConstantObject();
a.a.b.bar = "foo";
assertEquals("foo", n.bar);
// Test that exceptions for regexps still hold.
function makeRegexpInArray() { return [ [ /a*/, {} ] ]; }
a = makeRegexpInArray();
var b = makeRegexpInArray();
assertFalse(a[0][0] === b[0][0]);
assertFalse(a[0][1] === b[0][1]);
function makeRegexpInObject() { return { a: { b: /b*/, c: {} } }; }
a = makeRegexpInObject();
b = makeRegexpInObject();
assertFalse(a.a.b === b.a.b);
assertFalse(a.a.c === b.a.c);
// Test keywords valid as property names in initializers and dot-access.
var keywords = [
"break",
"case",
"catch",
"const",
"continue",
"debugger",
"default",
"delete",
"do",
"else",
"false",
"finally",
"for",
"function",
"if",
"in",
"instanceof",
"native",
"new",
"null",
"return",
"switch",
"this",
"throw",
"true",
"try",
"typeof",
"var",
"void",
"while",
"with",
];
function testKeywordProperty(keyword) {
try {
// Sanity check that what we get is a keyword.
eval("var " + keyword + " = 42;");
assertUnreachable("Not a keyword: " + keyword);
} catch (e) { }
// Simple property, read and write.
var x = eval("({" + keyword + ": 42})");
assertEquals(42, x[keyword]);
assertEquals(42, eval("x." + keyword));
eval("x." + keyword + " = 37");
assertEquals(37, x[keyword]);
assertEquals(37, eval("x." + keyword));
// Getter/setter property, read and write.
var y = eval("({value : 42, get " + keyword + "(){return this.value}," +
" set " + keyword + "(v) { this.value = v; }})");
assertEquals(42, y[keyword]);
assertEquals(42, eval("y." + keyword));
eval("y." + keyword + " = 37");
assertEquals(37, y[keyword]);
assertEquals(37, eval("y." + keyword));
// Quoted keyword works is read back by unquoted as well.
var z = eval("({\"" + keyword + "\": 42})");
assertEquals(42, z[keyword]);
assertEquals(42, eval("z." + keyword));
// Function property, called.
var was_called;
function test_call() { this.was_called = true; was_called = true; }
var w = eval("({" + keyword + ": test_call, was_called: false})");
eval("w." + keyword + "();");
assertTrue(was_called);
assertTrue(w.was_called);
// Function property, constructed.
function construct() { this.constructed = true; }
var v = eval("({" + keyword + ": construct})");
var vo = eval("new v." + keyword + "()");
assertTrue(vo instanceof construct);
assertTrue(vo.constructed);
}
for (var i = 0; i < keywords.length; i++) {
testKeywordProperty(keywords[i]);
}