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53 lines
2.2 KiB
JavaScript
53 lines
2.2 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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// Tests the special cases specified by ES 15.8.2.17
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function test(expected_sqrt, value) {
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assertEquals(expected_sqrt, Math.sqrt(value));
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if (isFinite(value)) {
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if (value === 0 && (1 / value) == -Infinity) {
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// Math.pow(-0, 0.5) must be zero, but Math.sqrt(-0) is -0.
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expected_sqrt = 0;
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}
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assertEquals(expected_sqrt, Math.pow(value, 0.5));
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}
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}
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// Simple sanity check
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test(2, 4);
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test(0.1, 0.01);
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// Spec tests
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test(NaN, NaN);
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test(NaN, -1);
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test(+0, +0);
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test(-0, -0);
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test(Infinity, Infinity);
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// -Infinity is smaller than 0 so it should return NaN
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test(NaN, -Infinity);
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