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test.js
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/*!
* paginationator <https://github.com/doowb/paginationator>
*
* Copyright (c) 2015 .
* Licensed under the MIT license.
*/
'use strict';
require('mocha');
var assert = require('assert');
var paginationator = require('./');
var Pages = paginationator.Pages;
var Page = paginationator.Page;
describe('paginationator', function() {
it('should paginate array using defaults', function() {
var pages = paginationator([
{name: 'item-1-1'}, {name: 'item-1-2'}, {name: 'item-1-3'}, {name: 'item-1-4'}, {name: 'item-1-5'},
{name: 'item-1-6'}, {name: 'item-1-7'}, {name: 'item-1-8'}, {name: 'item-1-9'}, {name: 'item-1-10'},
{name: 'item-2-1'}, {name: 'item-2-2'}, {name: 'item-2-3'}, {name: 'item-2-4'}, {name: 'item-2-5'},
{name: 'item-2-6'}, {name: 'item-2-7'}, {name: 'item-2-8'}, {name: 'item-2-9'}, {name: 'item-2-10'},
{name: 'item-3-1'}, {name: 'item-3-2'}, {name: 'item-3-3'}, {name: 'item-3-4'}, {name: 'item-3-5'},
{name: 'item-3-6'}, {name: 'item-3-7'}, {name: 'item-3-8'}, {name: 'item-3-9'}, {name: 'item-3-10'},
{name: 'item-4-1'}, {name: 'item-4-2'}, {name: 'item-4-3'}, {name: 'item-4-4'}, {name: 'item-4-5'},
{name: 'item-4-6'}, {name: 'item-4-7'}, {name: 'item-4-8'}, {name: 'item-4-9'}, {name: 'item-4-10'},
]);
assert.deepEqual(pages, {
pages: [
{current: 1, first: 1, idx: 0, last: 4, next: 2, total: 4, items: [
{name: 'item-1-1'}, {name: 'item-1-2'}, {name: 'item-1-3'}, {name: 'item-1-4'}, {name: 'item-1-5'},
{name: 'item-1-6'}, {name: 'item-1-7'}, {name: 'item-1-8'}, {name: 'item-1-9'}, {name: 'item-1-10'}
]},
{current: 2, first: 1, idx: 1, last: 4, next: 3, prev: 1, total: 4, items: [
{name: 'item-2-1'}, {name: 'item-2-2'}, {name: 'item-2-3'}, {name: 'item-2-4'}, {name: 'item-2-5'},
{name: 'item-2-6'}, {name: 'item-2-7'}, {name: 'item-2-8'}, {name: 'item-2-9'}, {name: 'item-2-10'}
]},
{current: 3, first: 1, idx: 2, last: 4, next: 4, prev: 2, total: 4, items: [
{name: 'item-3-1'}, {name: 'item-3-2'}, {name: 'item-3-3'}, {name: 'item-3-4'}, {name: 'item-3-5'},
{name: 'item-3-6'}, {name: 'item-3-7'}, {name: 'item-3-8'}, {name: 'item-3-9'}, {name: 'item-3-10'}
]},
{current: 4, first: 1, idx: 3, last: 4, prev: 3, total: 4, items: [
{name: 'item-4-1'}, {name: 'item-4-2'}, {name: 'item-4-3'}, {name: 'item-4-4'}, {name: 'item-4-5'},
{name: 'item-4-6'}, {name: 'item-4-7'}, {name: 'item-4-8'}, {name: 'item-4-9'}, {name: 'item-4-10'}
]}
]
});
});
it('should paginate array using custom options', function() {
var opts = {limit: 25};
var pages = paginationator([
{name: 'item-1-1'}, {name: 'item-1-2'}, {name: 'item-1-3'}, {name: 'item-1-4'}, {name: 'item-1-5'},
{name: 'item-1-6'}, {name: 'item-1-7'}, {name: 'item-1-8'}, {name: 'item-1-9'}, {name: 'item-1-10'},
{name: 'item-2-1'}, {name: 'item-2-2'}, {name: 'item-2-3'}, {name: 'item-2-4'}, {name: 'item-2-5'},
{name: 'item-2-6'}, {name: 'item-2-7'}, {name: 'item-2-8'}, {name: 'item-2-9'}, {name: 'item-2-10'},
{name: 'item-3-1'}, {name: 'item-3-2'}, {name: 'item-3-3'}, {name: 'item-3-4'}, {name: 'item-3-5'},
{name: 'item-3-6'}, {name: 'item-3-7'}, {name: 'item-3-8'}, {name: 'item-3-9'}, {name: 'item-3-10'},
{name: 'item-4-1'}, {name: 'item-4-2'}, {name: 'item-4-3'}, {name: 'item-4-4'}, {name: 'item-4-5'},
{name: 'item-4-6'}, {name: 'item-4-7'}, {name: 'item-4-8'}, {name: 'item-4-9'}, {name: 'item-4-10'},
], opts);
assert.deepEqual(pages, {
pages: [
{current: 1, first: 1, idx: 0, last: 2, next: 2, total: 2, items: [
{name: 'item-1-1'}, {name: 'item-1-2'}, {name: 'item-1-3'}, {name: 'item-1-4'}, {name: 'item-1-5'},
{name: 'item-1-6'}, {name: 'item-1-7'}, {name: 'item-1-8'}, {name: 'item-1-9'}, {name: 'item-1-10'},
{name: 'item-2-1'}, {name: 'item-2-2'}, {name: 'item-2-3'}, {name: 'item-2-4'}, {name: 'item-2-5'},
{name: 'item-2-6'}, {name: 'item-2-7'}, {name: 'item-2-8'}, {name: 'item-2-9'}, {name: 'item-2-10'},
{name: 'item-3-1'}, {name: 'item-3-2'}, {name: 'item-3-3'}, {name: 'item-3-4'}, {name: 'item-3-5'}
]},
{current: 2, first: 1, idx: 1, last: 2, prev: 1, total: 2, items: [
{name: 'item-3-6'}, {name: 'item-3-7'}, {name: 'item-3-8'}, {name: 'item-3-9'}, {name: 'item-3-10'},
{name: 'item-4-1'}, {name: 'item-4-2'}, {name: 'item-4-3'}, {name: 'item-4-4'}, {name: 'item-4-5'},
{name: 'item-4-6'}, {name: 'item-4-7'}, {name: 'item-4-8'}, {name: 'item-4-9'}, {name: 'item-4-10'}
]}
]
});
});
describe('Page', function() {
it('should create a new instance of Page with defaults', function() {
var page = new Page();
assert.deepEqual(page, {idx: 0, total: 1, current: 1});
});
it('should create a new instance of Page with provided page', function() {
var page = new Page({idx: 5, total: 10, current: 6});
assert.deepEqual(page, {idx: 5, total: 10, current: 6});
});
it('should calculate correct positional values when first', function() {
var page = new Page({idx: 0, total: 10, current: 1});
assert.equal(page.isFirst, true);
assert.equal(page.hasPrevious, false);
assert.equal(page.hasNext, true);
assert.equal(page.isLast, false);
});
it('should calculate correct positional values when last', function() {
var page = new Page({idx: 9, total: 10, current: 10});
assert.equal(page.isFirst, false);
assert.equal(page.hasPrevious, true);
assert.equal(page.hasNext, false);
assert.equal(page.isLast, true);
});
it('should calculate correct positional values when in the middle', function() {
var page = new Page({idx: 5, total: 10, current: 6});
assert.equal(page.isFirst, false);
assert.equal(page.hasPrevious, true);
assert.equal(page.hasNext, true);
assert.equal(page.isLast, false);
});
});
describe('Pages', function() {
it('should create a new instance of Pages', function() {
var pages = new Pages();
assert.deepEqual(pages, {pages: []});
});
it('should create a new instance of Pages with provided pages', function() {
var pages = new Pages([
{name: 'page-1'},
{name: 'page-2'},
{name: 'page-3'},
{name: 'page-4'}
]);
assert.deepEqual(pages, {
pages: [
{current: 1, first: 1, idx: 0, last: 4, next: 2, total: 4, name: 'page-1'},
{current: 2, first: 1, idx: 1, last: 4, next: 3, prev: 1, total: 4, name: 'page-2'},
{current: 3, first: 1, idx: 2, last: 4, next: 4, prev: 2, total: 4, name: 'page-3'},
{current: 4, first: 1, idx: 3, last: 4, prev: 3, total: 4, name: 'page-4'}
]
});
});
it('should update page information when new pages are added', function() {
var pages = new Pages([
{name: 'page-1'},
{name: 'page-2'},
{name: 'page-3'},
{name: 'page-4'}
]);
pages.addPage({name: 'page-5'});
assert.deepEqual(pages, {
pages: [
{current: 1, first: 1, idx: 0, last: 5, next: 2, total: 5, name: 'page-1'},
{current: 2, first: 1, idx: 1, last: 5, next: 3, prev: 1, total: 5, name: 'page-2'},
{current: 3, first: 1, idx: 2, last: 5, next: 4, prev: 2, total: 5, name: 'page-3'},
{current: 4, first: 1, idx: 3, last: 5, next: 5, prev: 3, total: 5, name: 'page-4'},
{current: 5, first: 1, idx: 4, last: 5, prev: 4, total: 5, name: 'page-5'}
]
});
});
});
});