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108 lines
3.6 KiB
JavaScript
108 lines
3.6 KiB
JavaScript
// test string utils
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var assert = require('assert');
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var approx = require('../../tools/approx');
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var BigNumber = require('decimal.js');
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var math = require('../../index');
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var string = require('../../lib/utils/string');
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describe ('string', function () {
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it('isString', function() {
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assert.equal(string.isString('hi'), true);
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assert.equal(string.isString(String('hi')), true);
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assert.equal(string.isString(23), false);
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assert.equal(string.isString(true), false);
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assert.equal(string.isString(new Date()), false);
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// we don't support non primitive Strings anymore
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assert.equal(string.isString(new String('hi')), false);
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});
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it('endsWith', function() {
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assert.equal(string.endsWith('hello', 'hello'), true);
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assert.equal(string.endsWith('hello', 'lo'), true);
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assert.equal(string.endsWith('hello', ''), true);
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assert.equal(string.endsWith('hello!', 'lo'), false);
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assert.equal(string.endsWith('hello', 'LO'), false);
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assert.equal(string.endsWith('hello', 'hellohello'), false);
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});
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describe('format', function () {
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it ('should format a number', function () {
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assert.equal(string.format(2.3), '2.3');
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});
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it ('should format a bignumber', function () {
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var B = BigNumber.config({
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precision: 20
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});
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assert.equal(string.format(new B(1).div(3)), '0.33333333333333333333');
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});
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it ('should format a fraction without options', function () {
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assert.equal(string.format(math.fraction(1,3)), '1/3');
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assert.equal(string.format(math.fraction(2,6)), '1/3');
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assert.equal(string.format(math.fraction(-0.125)), '-1/8');
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});
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it ('should format a fraction with option fraction=\'ratio\'', function () {
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assert.equal(string.format(math.fraction(1,3), {fraction: 'ratio'}), '1/3');
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assert.equal(string.format(math.fraction(2,6), {fraction: 'ratio'}), '1/3');
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});
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it ('should format a fraction with option fraction=\'decimal\'', function () {
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assert.equal(string.format(math.fraction(1,3), {fraction: 'decimal'}), '0.(3)');
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assert.equal(string.format(math.fraction(2,6), {fraction: 'decimal'}), '0.(3)');
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});
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it ('should format a number with configuration', function () {
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assert.equal(string.format(1.23456, 3), '1.23');
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assert.equal(string.format(1.23456, {precision: 3}), '1.23');
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});
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it ('should format an array', function () {
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assert.equal(string.format([1,2,3]), '[1, 2, 3]');
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assert.equal(string.format([[1,2],[3,4]]), '[[1, 2], [3, 4]]');
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});
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it ('should format a string', function () {
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assert.equal(string.format('string'), '"string"');
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});
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it ('should format an object with its own format function', function () {
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var obj = {
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format: function (options) {
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var str = 'obj';
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if (options !== undefined) {
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str += ' ' + JSON.stringify(options);
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}
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return str;
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}
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};
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assert.equal(string.format(obj), 'obj');
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assert.equal(string.format(obj, 4), 'obj 4');
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assert.equal(string.format(obj, {precision: 4}), 'obj {"precision":4}');
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});
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it ('should format a function', function () {
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assert.equal(string.format(function (a, b) {return a + b}), 'function');
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var f = function (a, b) {return a + b};
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f.syntax = 'f(x, y)';
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assert.equal(string.format(f), 'f(x, y)');
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});
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it ('should format unknown objects by converting them to string', function () {
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assert.equal(string.format({}), '[object Object]');
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});
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it ('should format unknown primitives by converting them to string', function () {
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assert.equal(string.format(true), 'true');
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});
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});
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}); |