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124 lines
4.7 KiB
JavaScript
124 lines
4.7 KiB
JavaScript
// Copyright 2010 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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// Flags: --expose-natives-as natives --allow-natives-syntax
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// Test the SameValue and SameValueZero internal methods.
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var obj1 = {x: 10, y: 11, z: "test"};
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var obj2 = {x: 10, y: 11, z: "test"};
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// Object.is() uses the SameValue algorithm.
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var sameValue = Object.is;
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// Set#has() uses the SameValueZero algorithm.
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var sameValueZero = (x, y) => new Set([x]).has(y);
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// Calls SameValue and SameValueZero and checks that their results match.
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function sameValueBoth(a, b) {
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var result = sameValue(a, b);
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assertTrue(result === sameValueZero(a, b));
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return result;
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}
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// Calls SameValue and SameValueZero and checks that their results don't match.
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function sameValueZeroOnly(a, b) {
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var result = sameValueZero(a, b);
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assertTrue(result && !sameValue(a, b));
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return result;
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}
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assertTrue(sameValueBoth(0, 0));
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assertTrue(sameValueBoth(+0, +0));
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assertTrue(sameValueBoth(-0, -0));
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assertTrue(sameValueBoth(1, 1));
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assertTrue(sameValueBoth(2, 2));
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assertTrue(sameValueBoth(-1, -1));
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assertTrue(sameValueBoth(0.5, 0.5));
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assertTrue(sameValueBoth(true, true));
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assertTrue(sameValueBoth(false, false));
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assertTrue(sameValueBoth(NaN, NaN));
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assertTrue(sameValueBoth(null, null));
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assertTrue(sameValueBoth("foo", "foo"));
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assertTrue(sameValueBoth(obj1, obj1));
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// Undefined values.
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assertTrue(sameValueBoth());
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assertTrue(sameValueBoth(undefined, undefined));
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assertFalse(sameValueBoth(0,1));
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assertFalse(sameValueBoth("foo", "bar"));
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assertFalse(sameValueBoth(obj1, obj2));
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assertFalse(sameValueBoth(true, false));
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assertFalse(sameValueBoth(obj1, true));
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assertFalse(sameValueBoth(obj1, "foo"));
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assertFalse(sameValueBoth(obj1, 1));
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assertFalse(sameValueBoth(obj1, undefined));
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assertFalse(sameValueBoth(obj1, NaN));
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assertFalse(sameValueBoth(undefined, true));
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assertFalse(sameValueBoth(undefined, "foo"));
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assertFalse(sameValueBoth(undefined, 1));
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assertFalse(sameValueBoth(undefined, obj1));
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assertFalse(sameValueBoth(undefined, NaN));
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assertFalse(sameValueBoth(NaN, true));
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assertFalse(sameValueBoth(NaN, "foo"));
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assertFalse(sameValueBoth(NaN, 1));
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assertFalse(sameValueBoth(NaN, obj1));
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assertFalse(sameValueBoth(NaN, undefined));
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assertFalse(sameValueBoth("foo", true));
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assertFalse(sameValueBoth("foo", 1));
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assertFalse(sameValueBoth("foo", obj1));
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assertFalse(sameValueBoth("foo", undefined));
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assertFalse(sameValueBoth("foo", NaN));
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assertFalse(sameValueBoth(true, 1));
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assertFalse(sameValueBoth(true, obj1));
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assertFalse(sameValueBoth(true, undefined));
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assertFalse(sameValueBoth(true, NaN));
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assertFalse(sameValueBoth(true, "foo"));
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assertFalse(sameValueBoth(1, true));
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assertFalse(sameValueBoth(1, obj1));
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assertFalse(sameValueBoth(1, undefined));
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assertFalse(sameValueBoth(1, NaN));
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assertFalse(sameValueBoth(1, "foo"));
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// Special string cases.
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assertFalse(sameValueBoth("1", 1));
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assertFalse(sameValueBoth("true", true));
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assertFalse(sameValueBoth("false", false));
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assertFalse(sameValueBoth("undefined", undefined));
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assertFalse(sameValueBoth("NaN", NaN));
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// SameValue considers -0 and +0 to be different; SameValueZero considers
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// -0 and +0 to be the same.
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assertTrue(sameValueZeroOnly(+0, -0));
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assertTrue(sameValueZeroOnly(-0, +0));
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