significantDigitsOfZero.js

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// |reftest| skip-if(!this.hasOwnProperty("Intl"))

// -- test that NumberFormat correctly formats 0 with various numbers of significant digits

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

var testData = [

    {minimumSignificantDigits: 1, maximumSignificantDigits: 1, expected: "0"},

    {minimumSignificantDigits: 1, maximumSignificantDigits: 2, expected: "0"},

    {minimumSignificantDigits: 1, maximumSignificantDigits: 3, expected: "0"},

    {minimumSignificantDigits: 1, maximumSignificantDigits: 4, expected: "0"},

    {minimumSignificantDigits: 1, maximumSignificantDigits: 5, expected: "0"},

    {minimumSignificantDigits: 2, maximumSignificantDigits: 2, expected: "0.0"},

    {minimumSignificantDigits: 2, maximumSignificantDigits: 3, expected: "0.0"},

    {minimumSignificantDigits: 2, maximumSignificantDigits: 4, expected: "0.0"},

    {minimumSignificantDigits: 2, maximumSignificantDigits: 5, expected: "0.0"},

    {minimumSignificantDigits: 3, maximumSignificantDigits: 3, expected: "0.00"},

    {minimumSignificantDigits: 3, maximumSignificantDigits: 4, expected: "0.00"},

    {minimumSignificantDigits: 3, maximumSignificantDigits: 5, expected: "0.00"},

];

for (var i = 0; i < testData.length; i++) {

    var min = testData[i].minimumSignificantDigits;

    var max = testData[i].maximumSignificantDigits;

    var options = {minimumSignificantDigits: min, maximumSignificantDigits: max};

    var format = new Intl.NumberFormat("en-US", options);

    var actual = format.format(0);

    var expected = testData[i].expected;

    assertEq(actual, expected,

             "Wrong formatted string for 0 with " +

             "minimumSignificantDigits " + min +

             ", maximumSignificantDigits " + max +

             ": expected \"" + expected +

             "\", actual \"" + actual + "\"");

reportCompare(true, true);