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73 lines
3.5 KiB
JavaScript
73 lines
3.5 KiB
JavaScript
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Tests of unary delete in cases where it is always true or always false.
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// In an effect context, expression is always true.
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assertEquals(undefined, void (delete 0));
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// In an effect context, expression is always false.
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assertEquals(undefined, (function (x) { delete x; })(0));
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// In a pure test context, expression is always true.
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assertEquals(1, (delete 0) ? 1 : 2);
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// In a pure test context, expression is always false.
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assertEquals(2, (function (x) { return (delete x) ? 1 : 2; })(0));
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// In a negated test context, expression is always false.
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assertEquals(1, (function (x) { return !(delete x) ? 1 : 2; })(0));
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// In a hybrid test/value context, expression is always true, value
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// expected in accumulator.
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assertEquals(3, 1 + ((delete 0) && 2));
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// In a hybrid test/value context, expression is always false, value
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// expected in accumulator.
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assertEquals(false, (function (x) { return (delete x) && 2; })(0));
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// In a hybrid test/value context, expression is always true, value
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// expected on stack.
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assertEquals(3, ((delete 0) && 2) + 1);
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// In a hybrid test/value context, expression is always false, value
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// expected on stack.
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assertEquals(1, (function (x) { return ((delete x) && 2) + 1; })(0));
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// In a hybrid value/test context, expression is always true, value
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// expected in accumulator.
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assertEquals(2, 1 + ((delete 0) || 2));
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// In a hybrid value/test context, expression is always false, value
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// expected in accumulator.
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assertEquals(2, (function (x) { return (delete x) || 2; })(0));
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// In a hybrid value/test context, expression is always true, value
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// expected on stack.
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assertEquals(2, ((delete 0) || 2) + 1);
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// In a hybrid value/test context, expression is always false, value
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// expected on stack.
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assertEquals(3, (function (x) { return ((delete x) || 2) + 1; })(0));
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// 'this' is not a Reference so delete returns true (see section 11.4.1,
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// step 2 of ES 5.1).
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assertEquals(true, delete this);
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assertEquals(true, (function () { return delete this; })());
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