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module.exports = function (sort, algorithmName, options) {

'use strict';

options = options || {

integers: false,

reverse: true

};

describe(algorithmName, function () {

function createRandomArray(config) {

config = config || {};

var size = config.size || 100;

var precision = config.precision || 2;

var multiplier = config.multiplier || 100;

var result = [];

for (var i = size; i > 0; i -= 1) {

result.push(parseFloat((Math.random() *

multiplier).toFixed(precision)));

}

return result;

}

it('should work with empty array', function () {

expect(sort([])).toEqual([]);

});

it('should work with sorted arrays', function () {

expect(sort([1, 2, 3, 4])).toEqual([1, 2, 3, 4]);

});

it('should work with random non-sorted arrays', function () {

var array;

if (options.integers) {

array = createRandomArray();

} else {

array = createRandomArray({

precision: 0

});

}

sort(array);

for (var i = 0; i < array.length - 1; i += 1) {

expect(array[i] <= array[i + 1]).toBeTruthy();

}

});

if (options.reverse) {

it('should sort the numbers in descending order ' +

'when such comparator is provided', function () {

function comparator(a, b) {

return b - a;

}

var array = createRandomArray();

sort(array, comparator);

for (var i = 0; i < array.length - 1; i += 1) {

expect(array[i] >= array[i + 1]).toBeTruthy();

}

});

}

});

};