369 lines
11 KiB
JavaScript
369 lines
11 KiB
JavaScript
import {listen} from '../../../src/ol/events.js';
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import Collection from '../../../src/ol/Collection.js';
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import CollectionEventType from '../../../src/ol/CollectionEventType.js';
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describe('ol.collection', function() {
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let collection;
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beforeEach(function() {
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collection = new Collection();
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});
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describe('create an empty collection', function() {
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it('creates an empty collection', function() {
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expect(collection.getLength()).to.eql(0);
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expect(collection.getArray()).to.be.empty();
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expect(collection.item(0)).to.be(undefined);
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});
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});
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describe('create a collection from an array', function() {
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it('creates the expected collection', function() {
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const array = [0, 1, 2];
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const collection = new Collection(array);
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expect(collection.item(0)).to.eql(0);
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expect(collection.item(1)).to.eql(1);
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expect(collection.item(2)).to.eql(2);
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});
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});
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describe('push to a collection', function() {
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it('adds elements to the collection', function() {
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const length = collection.push(1);
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expect(collection.getLength()).to.eql(length);
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expect(collection.getArray()).to.eql([1]);
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expect(collection.item(0)).to.eql(1);
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});
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it('returns the correct new length of the collection', function() {
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let length;
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listen(collection, 'add', function(event) {
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if (event.element === 'remove_me') {
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collection.remove(event.element);
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}
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});
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length = collection.push('keep_me');
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expect(collection.getLength()).to.eql(length);
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length = collection.push('remove_me');
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expect(collection.getLength()).to.eql(length);
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});
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});
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describe('pop from a collection', function() {
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it('removes elements from the collection', function() {
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collection.push(1);
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collection.pop();
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expect(collection.getLength()).to.eql(0);
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expect(collection.getArray()).to.be.empty();
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expect(collection.item(0)).to.be(undefined);
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});
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});
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describe('insertAt', function() {
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it('inserts elements at the correct location', function() {
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collection = new Collection([0, 2]);
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collection.insertAt(1, 1);
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expect(collection.item(0)).to.eql(0);
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expect(collection.item(1)).to.eql(1);
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expect(collection.item(2)).to.eql(2);
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});
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});
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describe('setAt', function() {
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it('sets at the correct location', function() {
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collection.setAt(1, 1);
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expect(collection.getLength()).to.eql(2);
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expect(collection.item(0)).to.be(undefined);
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expect(collection.item(1)).to.eql(1);
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});
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});
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describe('removeAt', function() {
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it('removes elements at the correction', function() {
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const collection = new Collection([0, 1, 2]);
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collection.removeAt(1);
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expect(collection.item(0)).to.eql(0);
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expect(collection.item(1)).to.eql(2);
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});
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});
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describe('forEach', function() {
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let cb;
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beforeEach(function() {
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cb = sinon.spy();
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});
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describe('on an empty collection', function() {
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it('does not call the callback', function() {
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collection.forEach(cb);
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expect(cb).to.not.be.called();
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});
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});
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describe('on a non-empty collection', function() {
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it('does call the callback', function() {
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collection.push(1);
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collection.push(2);
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collection.forEach(cb);
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expect(cb.callCount).to.eql(2);
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});
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});
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});
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describe('remove', function() {
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it('removes the first matching element', function() {
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const collection = new Collection([0, 1, 2]);
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expect(collection.remove(1)).to.eql(1);
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expect(collection.getArray()).to.eql([0, 2]);
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expect(collection.getLength()).to.eql(2);
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});
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it('fires a remove event', function() {
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const collection = new Collection([0, 1, 2]);
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const cb = sinon.spy();
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listen(collection, CollectionEventType.REMOVE, cb);
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expect(collection.remove(1)).to.eql(1);
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expect(cb).to.be.called();
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expect(cb.lastCall.args[0].element).to.eql(1);
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});
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it('does not remove more than one matching element', function() {
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const collection = new Collection([0, 1, 1, 2]);
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expect(collection.remove(1)).to.eql(1);
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expect(collection.getArray()).to.eql([0, 1, 2]);
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expect(collection.getLength()).to.eql(3);
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});
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it('returns undefined if the element is not found', function() {
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const collection = new Collection([0, 1, 2]);
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expect(collection.remove(3)).to.be(undefined);
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expect(collection.getArray()).to.eql([0, 1, 2]);
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expect(collection.getLength()).to.eql(3);
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});
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});
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describe('setAt and event', function() {
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it('does dispatch events', function() {
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const collection = new Collection(['a', 'b']);
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let added, removed, addedIndex, removedIndex;
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listen(collection, CollectionEventType.ADD, function(e) {
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added = e.element;
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addedIndex = e.index;
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});
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listen(collection, CollectionEventType.REMOVE, function(e) {
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removed = e.element;
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removedIndex = e.index;
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});
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collection.setAt(1, 1);
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expect(added).to.eql(1);
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expect(addedIndex).to.eql(1);
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expect(removed).to.eql('b');
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expect(removedIndex).to.eql(1);
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});
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});
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describe('removeAt and event', function() {
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it('does dispatch events', function() {
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const collection = new Collection(['a']);
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let removed, removedIndex;
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listen(collection, CollectionEventType.REMOVE, function(e) {
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removed = e.element;
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removedIndex = e.index;
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});
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collection.pop();
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expect(removed).to.eql('a');
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expect(removedIndex).to.eql(0);
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});
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});
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describe('insertAt and event', function() {
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it('does dispatch events', function() {
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const collection = new Collection([0, 2]);
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let added, addedIndex;
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listen(collection, CollectionEventType.ADD, function(e) {
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added = e.element;
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addedIndex = e.index;
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});
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collection.insertAt(1, 1);
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expect(added).to.eql(1);
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expect(addedIndex).to.eql(1);
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});
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});
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describe('setAt beyond end', function() {
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it('triggers events properly', function() {
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const added = [], addedIndexes = [];
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listen(collection, CollectionEventType.ADD, function(e) {
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added.push(e.element);
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addedIndexes.push(e.index);
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});
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collection.setAt(2, 0);
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expect(collection.getLength()).to.eql(3);
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expect(collection.item(0)).to.be(undefined);
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expect(collection.item(1)).to.be(undefined);
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expect(collection.item(2)).to.eql(0);
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expect(added.length).to.eql(3);
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expect(added[0]).to.eql(undefined);
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expect(added[1]).to.eql(undefined);
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expect(added[2]).to.eql(0);
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expect(addedIndexes).to.eql([0, 1, 2]);
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});
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});
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describe('change:length event', function() {
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let collection, cb;
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beforeEach(function() {
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collection = new Collection([0, 1, 2]);
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cb = sinon.spy();
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listen(collection, 'change:length', cb);
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});
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describe('insertAt', function() {
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it('triggers change:length event', function() {
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collection.insertAt(2, 3);
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expect(cb).to.be.called();
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});
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});
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describe('removeAt', function() {
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it('triggers change:length event', function() {
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collection.removeAt(0);
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expect(cb).to.be.called();
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});
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});
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describe('setAt', function() {
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it('does not trigger change:length event', function() {
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collection.setAt(1, 1);
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expect(cb).to.not.be.called();
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});
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});
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});
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describe('add event', function() {
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it('triggers add when pushing', function() {
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const collection = new Collection();
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let elem, addedIndex;
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listen(collection, CollectionEventType.ADD, function(e) {
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elem = e.element;
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addedIndex = e.index;
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});
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const length = collection.push(1);
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expect(elem).to.eql(length);
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expect(addedIndex).to.eql(0);
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});
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});
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describe('remove event', function() {
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let collection, cb1, cb2;
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beforeEach(function() {
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collection = new Collection([1]);
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cb1 = sinon.spy();
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cb2 = sinon.spy();
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});
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describe('setAt', function() {
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it('triggers remove', function() {
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listen(collection, CollectionEventType.ADD, cb1);
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listen(collection, CollectionEventType.REMOVE, cb2);
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collection.setAt(0, 2);
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expect(cb2.lastCall.args[0].element).to.eql(1);
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expect(cb1.lastCall.args[0].element).to.eql(2);
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});
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});
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describe('pop', function() {
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it('triggers remove', function() {
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listen(collection, CollectionEventType.REMOVE, cb1);
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collection.pop();
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expect(cb1.lastCall.args[0].element).to.eql(1);
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});
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});
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});
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describe('extending a collection', function() {
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it('adds elements to end of the collection', function() {
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collection.extend([1, 2]);
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expect(collection.getLength()).to.eql(2);
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expect(collection.getArray()).to.eql([1, 2]);
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expect(collection.item(0)).to.eql(1);
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expect(collection.item(1)).to.eql(2);
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});
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it('fires events', function() {
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const collection = new Collection();
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const elems = [], addedIndexes = [];
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listen(collection, CollectionEventType.ADD, function(e) {
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elems.push(e.element);
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addedIndexes.push(e.index);
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});
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collection.extend([1, 2]);
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expect(elems).to.eql([1, 2]);
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expect(addedIndexes).to.eql([0, 1]);
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});
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});
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describe('unique collection', function() {
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it('allows unique items in the constructor', function() {
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new Collection([{}, {}, {}], {unique: true});
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});
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it('throws if duplicate items are passed to the constructor', function() {
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const item = {};
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const call = function() {
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new Collection([item, item], {unique: true});
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};
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expect(call).to.throwException();
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});
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it('allows unique items to be added via push', function() {
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const unique = new Collection(undefined, {unique: true});
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unique.push({});
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unique.push({});
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});
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it('throws if duplicate items are added via push', function() {
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const unique = new Collection(undefined, {unique: true});
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const item = {};
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unique.push(item);
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const call = function() {
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unique.push(item);
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};
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expect(call).to.throwException();
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});
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it('allows unique items to be added via insertAt', function() {
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const unique = new Collection(undefined, {unique: true});
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unique.insertAt(0, {});
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unique.insertAt(0, {});
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});
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it('throws if duplicate items are added via insertAt', function() {
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const unique = new Collection(undefined, {unique: true});
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const item = {};
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unique.insertAt(0, item);
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const call = function() {
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unique.insertAt(0, item);
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};
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expect(call).to.throwException();
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});
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it('allows unique items to be added via setAt', function() {
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const unique = new Collection(undefined, {unique: true});
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unique.setAt(0, {});
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unique.setAt(1, {});
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});
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it('allows items to be reset via setAt', function() {
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const unique = new Collection(undefined, {unique: true});
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const item = {};
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unique.setAt(0, item);
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unique.setAt(0, item);
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});
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it('throws if duplicate items are added via setAt', function() {
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const unique = new Collection(undefined, {unique: true});
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const item = {};
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unique.setAt(0, item);
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const call = function() {
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unique.setAt(1, item);
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};
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expect(call).to.throwException();
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});
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});
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});
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