130 lines
2.9 KiB
JavaScript
130 lines
2.9 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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*
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* Date: 16 Dec 2002
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* SUMMARY: Testing |with (x) {function f() {}}| when |x.f| already exists
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* See http://bugzilla.mozilla.org/show_bug.cgi?id=185485
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*
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* The idea is this: if |x| does not already have a property named |f|,
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* a |with| statement cannot be used to define one. See, for example,
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*
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* http://bugzilla.mozilla.org/show_bug.cgi?id=159849#c11
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* http://bugzilla.mozilla.org/show_bug.cgi?id=184107
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*
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*
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* However, if |x| already has a property |f|, a |with| statement can be
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* used to modify the value it contains:
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*
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* with (x) {f = 1;}
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*
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* This should work even if we use a |var| statement, like this:
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*
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* with (x) {var f = 1;}
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*
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* However, it should NOT work if we use a |function| statement, like this:
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*
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* with (x) {function f() {}}
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*
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* Instead, this should newly define a function f in global scope.
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* See http://bugzilla.mozilla.org/show_bug.cgi?id=185485
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*
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*/
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//-----------------------------------------------------------------------------
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var UBound = 0;
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var BUGNUMBER = 185485;
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var summary = 'Testing |with (x) {function f() {}}| when |x.f| already exists';
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var status = '';
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var statusitems = [];
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var actual = '';
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var actualvalues = [];
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var expect= '';
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var expectedvalues = [];
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var x = { f:0, g:0 };
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with (x)
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{
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f = 1;
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}
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status = inSection(1);
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actual = x.f;
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expect = 1;
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addThis();
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with (x)
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{
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var f = 2;
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}
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status = inSection(2);
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actual = x.f;
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expect = 2;
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addThis();
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/*
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* Use of a function statement under the with-block should not affect
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* the local property |f|, but define a function |f| in global scope -
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*/
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with (x)
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{
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function f() {}
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}
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status = inSection(3);
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actual = x.f;
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expect = 2;
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addThis();
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status = inSection(4);
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actual = typeof this.f;
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expect = 'function';
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addThis();
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/*
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* Compare use of function expression instead of function statement.
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* Note it is important that |x.g| already exists. Otherwise, this
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* would newly define |g| in global scope -
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*/
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with (x)
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{
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var g = function() {}
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}
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status = inSection(5);
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actual = x.g.toString();
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expect = (function() {}).toString();
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addThis();
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//-----------------------------------------------------------------------------
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test();
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//-----------------------------------------------------------------------------
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function addThis()
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{
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statusitems[UBound] = status;
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actualvalues[UBound] = actual;
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expectedvalues[UBound] = expect;
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UBound++;
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}
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function test()
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{
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enterFunc('test');
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printBugNumber(BUGNUMBER);
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printStatus(summary);
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for (var i=0; i<UBound; i++)
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{
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reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
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}
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exitFunc ('test');
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}
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