map.test.js
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/* eslint-disable no-undefined */
'use strict';
var Map = require('../src/js/map');
describe('module:Map', function() {
var map;
beforeEach(function() {
map = new Map();
});
describe('The tui.util.Map', function() {
it('is defined', function() {
expect(Map).toBeDefined();
});
it('is a constructor', function() {
expect(map instanceof Map).toBe(true);
});
describe('has an argument', function() {
it('that can be an array', function() {
var initData = [
[1, 'one'],
[2, 'two'],
[3, 'three']
];
map = new Map(initData);
expect(map.get(1)).toBe('one');
expect(map.get(2)).toBe('two');
expect(map.get(3)).toBe('three');
});
});
});
describe('set() and get()', function() {
it('for the string key', function() {
map.set('company', 'nhn ent');
map.set('team', 'FE');
expect(map.get('company')).toEqual('nhn ent');
expect(map.get('team')).toEqual('FE');
});
it('for the object key', function() {
var key1 = {},
key2 = function() {},
key3 = [];
map.set(key1, 'object');
map.set(key2, 'function');
map.set(key3, 'array');
expect(map.get(key1)).toEqual('object');
expect(map.get(key2)).toEqual('function');
expect(map.get(key3)).toEqual('array');
});
it('set returns map object', function() {
var returned = map.set(1, 'one');
expect(returned).toBe(map);
});
describe('if the key already exists, set() updates the value', function() {
it('with string key', function() {
map.set('key', 'once');
map.set('key', 'again');
expect(map.get('key')).toEqual('again');
});
it('with object key', function() {
var key = {};
map.set(key, 'once');
map.set(key, 'again');
expect(map.get(key)).toEqual('again');
});
});
describe('get() returns undefined', function() {
it('if the key does not exist', function() {
expect(map.get('key')).toBeUndefined();
});
it('if the value is undefined', function() {
map.set('key', undefined);
expect(map.get('key')).toBeUndefined();
});
});
describe('primitive values', function() {
it('can be used for the key', function() {
map.set(null, 'null');
map.set(undefined, 'undefined');
map.set(true, 'true');
map.set(false, 'false');
map.set(1, 'one');
expect(map.get(null)).toEqual('null');
expect(map.get(undefined)).toEqual('undefined');
expect(map.get(true)).toEqual('true');
expect(map.get(false)).toEqual('false');
expect(map.get(1)).toEqual('one');
});
it('are not equal to string keys', function() {
map.set(null, 'null');
map.set('null', 'null string');
map.set(1, 'one');
map.set('1', 'one string');
expect(map.get(null)).toEqual('null');
expect(map.get('null')).toEqual('null string');
expect(map.get(1)).toEqual('one');
expect(map.get('1')).toEqual('one string');
});
it('NaN can be used for the key', function() {
map.set(NaN, 'NaN');
expect(map.get(NaN)).toEqual('NaN');
});
});
});
describe('has()', function() {
it('returns true if the key exists', function() {
map.set(1, 'one');
expect(map.has(1)).toBe(true);
});
it('returns true even if value is undefined', function() {
map.set(1, undefined);
expect(map.has(1)).toBe(true);
expect(map.get(1)).toBeUndefined();
});
it('returns false if the key does not exists', function() {
expect(map.has(1)).toBe(false);
});
});
describe('delete() removes the element', function() {
it('for the string key', function() {
map.set('1', 'one');
map['delete']('1');
expect(map.has('1')).toBe(false);
});
it('for the object key', function() {
var key = {};
map.set(key, 'value');
map['delete'](key);
expect(map.has(key)).toBe(false);
});
it('delete and set again', function() {
var key = {};
map.set(key, 'once');
map['delete'](key);
map.set(key, 'again');
expect(map.get(key)).toBe('again');
});
it('delete and set again with undefined key', function() {
map.set(undefined, 'once');
map['delete'](undefined);
expect(map.has(undefined)).toBe(false);
map.set(undefined, 'again');
expect(map.get(undefined)).toBe('again');
});
it('deleted key is not undefined key', function() {
map.set(1, 'one');
map.set(undefined, 'undefined');
map['delete'](1);
expect(map.get(undefined)).toBe('undefined');
});
});
describe('size property', function() {
it('is the number of elements in a map', function() {
expect(map.size).toEqual(0);
map.set(1, 'one');
map.set(2, 'two');
expect(map.size).toEqual(2);
map.set(2, 'two again');
expect(map.size).toEqual(2);
map['delete'](2);
expect(map.size).toEqual(1);
});
});
describe('clear()', function() {
it('removes all elements', function() {
map.set(1, 'one');
map.set(2, 'two');
expect(map.size).toEqual(2);
map.clear();
expect(map.size).toEqual(0);
expect(map.has(1)).toBe(false);
expect(map.has(2)).toBe(false);
});
});
describe('forEach() executes a function once per each key/value pair', function() {
var string;
beforeEach(function() {
string = '';
map.set(1, '1');
map.set(null, '2');
map.set('3', '3');
});
it('in insertion order', function() {
map.forEach(function(value) {
string += value;
});
expect(string).toEqual('123');
});
it('second argument is key', function() {
map.forEach(function(value, key) {
string += key;
});
expect(string).toEqual('1null3');
});
it('third argument is map itself', function() {
map.forEach(function(value, key, thisMap) {
string += thisMap.get(key);
});
expect(string).toEqual('123');
});
it('context can be set', function() {
var context = {value: '0'};
map.forEach(function(value) {
string += (value + this.value);
}, context);
expect(string).toEqual('102030');
});
});
describe('keys(), values(), entries() returns Iterator object in insertion order', function() {
beforeEach(function() {
map.set(null, '1');
map.set(undefined, '2');
map.set('3', '3');
});
describe('Iterator from keys()', function() {
var keys;
beforeEach(function() {
keys = map.keys();
});
it('contains the keys for each element', function() {
expect(keys.next().value).toBe(null);
expect(keys.next().value).toBe(undefined);
expect(keys.next().value).toBe('3');
});
it('done is false if there are more values. otherwise is true', function() {
expect(keys.next().done).toBe(false);
expect(keys.next().done).toBe(false);
expect(keys.next().done).toBe(false);
expect(keys.next().done).toBe(true);
});
});
describe('Iterator from values()', function() {
var values;
beforeEach(function() {
values = map.values();
});
it('contains the values for each element', function() {
expect(values.next().value).toBe('1');
expect(values.next().value).toBe('2');
expect(values.next().value).toBe('3');
});
it('done is false if there are more values. otherwise is true', function() {
expect(values.next().done).toBe(false);
expect(values.next().done).toBe(false);
expect(values.next().done).toBe(false);
expect(values.next().done).toBe(true);
});
});
describe('Iterator from values()', function() {
var entries;
beforeEach(function() {
entries = map.entries();
});
it('contains the values for each element', function() {
expect(entries.next().value).toEqual([null, '1']);
expect(entries.next().value).toEqual([undefined, '2']);
expect(entries.next().value).toEqual(['3', '3']);
});
it('done is false if there are more values. otherwise is true', function() {
expect(entries.next().done).toBe(false);
expect(entries.next().done).toBe(false);
expect(entries.next().done).toBe(false);
expect(entries.next().done).toBe(true);
});
});
});
});