JezK
Edit File: mirror-number.js
// Copyright 2008 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. // Flags: --expose-debug-as debug // Test the mirror object for number values function testNumberMirror(n) { // Create mirror and JSON representation. var mirror = debug.MakeMirror(n); var serializer = debug.MakeMirrorSerializer(); var json = JSON.stringify(serializer.serializeValue(mirror)); // Check the mirror hierachy. assertTrue(mirror instanceof debug.Mirror); assertTrue(mirror instanceof debug.ValueMirror); assertTrue(mirror instanceof debug.NumberMirror); // Check the mirror properties. assertTrue(mirror.isNumber()); assertEquals('number', mirror.type()); assertTrue(mirror.isPrimitive()); // Test text representation assertEquals(String(n), mirror.toText()); // Parse JSON representation and check. var fromJSON = eval('(' + json + ')'); assertEquals('number', fromJSON.type); if (isFinite(n)) { assertEquals(n, fromJSON.value); } else { // NaN and Infinity values are encoded as strings. assertTrue(typeof fromJSON.value == 'string'); if (n === Infinity) { assertEquals('Infinity', fromJSON.value); } else if (n === -Infinity) { assertEquals('-Infinity', fromJSON.value); } else { assertEquals('NaN', fromJSON.value); } } } // Test a number of different numbers. testNumberMirror(-7); testNumberMirror(-6.5); testNumberMirror(0); testNumberMirror(42); testNumberMirror(100.0002); testNumberMirror(Infinity); testNumberMirror(-Infinity); testNumberMirror(NaN);