JezK
Edit File: to-precision.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. // Test the exponential notation output. assertEquals("1e+27", (1.2345e+27).toPrecision(1)); assertEquals("1.2e+27", (1.2345e+27).toPrecision(2)); assertEquals("1.23e+27", (1.2345e+27).toPrecision(3)); assertEquals("1.234e+27", (1.2345e+27).toPrecision(4)); assertEquals("1.2345e+27", (1.2345e+27).toPrecision(5)); assertEquals("1.23450e+27", (1.2345e+27).toPrecision(6)); assertEquals("1.234500e+27", (1.2345e+27).toPrecision(7)); assertEquals("-1e+27", (-1.2345e+27).toPrecision(1)); assertEquals("-1.2e+27", (-1.2345e+27).toPrecision(2)); assertEquals("-1.23e+27", (-1.2345e+27).toPrecision(3)); assertEquals("-1.234e+27", (-1.2345e+27).toPrecision(4)); assertEquals("-1.2345e+27", (-1.2345e+27).toPrecision(5)); assertEquals("-1.23450e+27", (-1.2345e+27).toPrecision(6)); assertEquals("-1.234500e+27", (-1.2345e+27).toPrecision(7)); // Test the fixed notation output. assertEquals("7", (7).toPrecision(1)); assertEquals("7.0", (7).toPrecision(2)); assertEquals("7.00", (7).toPrecision(3)); assertEquals("-7", (-7).toPrecision(1)); assertEquals("-7.0", (-7).toPrecision(2)); assertEquals("-7.00", (-7).toPrecision(3)); assertEquals("9e+1", (91).toPrecision(1)); assertEquals("91", (91).toPrecision(2)); assertEquals("91.0", (91).toPrecision(3)); assertEquals("91.00", (91).toPrecision(4)); assertEquals("-9e+1", (-91).toPrecision(1)); assertEquals("-91", (-91).toPrecision(2)); assertEquals("-91.0", (-91).toPrecision(3)); assertEquals("-91.00", (-91).toPrecision(4)); assertEquals("9e+1", (91.1234).toPrecision(1)); assertEquals("91", (91.1234).toPrecision(2)); assertEquals("91.1", (91.1234).toPrecision(3)); assertEquals("91.12", (91.1234).toPrecision(4)); assertEquals("91.123", (91.1234).toPrecision(5)); assertEquals("91.1234", (91.1234).toPrecision(6)); assertEquals("91.12340", (91.1234).toPrecision(7)); assertEquals("91.123400", (91.1234).toPrecision(8)); assertEquals("-9e+1", (-91.1234).toPrecision(1)); assertEquals("-91", (-91.1234).toPrecision(2)); assertEquals("-91.1", (-91.1234).toPrecision(3)); assertEquals("-91.12", (-91.1234).toPrecision(4)); assertEquals("-91.123", (-91.1234).toPrecision(5)); assertEquals("-91.1234", (-91.1234).toPrecision(6)); assertEquals("-91.12340", (-91.1234).toPrecision(7)); assertEquals("-91.123400", (-91.1234).toPrecision(8));