terriajs/test/Utility/CustomMatchers.js

Geospatial data visualization platform.

'use strict';

/*global require*/
var defined = require('terriajs-cesium/Source/Core/defined');

function equals(util, customEqualityTesters, a, b) {
    return util.equals(a, b, customEqualityTesters);
}

module.exports = {
    toEqualEpsilon : function(util, customEqualityTesters) {
        return {
            compare: function(actual, expected, epsilon) {
                function equalityTester(a, b) {
                    var to_run;
                    if (defined(a)) {
                        if (typeof a.equalsEpsilon === 'function') {
                            return a.equalsEpsilon(b, epsilon);
                        } else if (a instanceof Object) {
                            // Check if the current object has a static function named 'equalsEpsilon'
                            to_run = Object.getPrototypeOf(a).constructor.equalsEpsilon;
                            if (typeof to_run === 'function') {
                                return to_run(a, b, epsilon);
                            }
                        }
                    }

                    if (defined(b)) {
                        if (typeof b.equalsEpsilon === 'function') {
                            return b.equalsEpsilon(a, epsilon);
                        } else if (b instanceof Object) {
                            // Check if the current object has a static function named 'equalsEpsilon'
                            to_run = Object.getPrototypeOf(b).constructor.equalsEpsilon;
                            if (typeof to_run === 'function') {
                                return to_run(b, a, epsilon);
                            }
                        }
                    }

                    if (typeof a === 'number' || typeof b === 'number') {
                        return Math.abs(a - b) <= epsilon;
                    }

                    return undefined;
                }

                var result = equals(util, [equalityTester], actual, expected);

                return { pass : result };
            }
        };
    }
};