154 lines
4.0 KiB
JavaScript
154 lines
4.0 KiB
JavaScript
import Map from '../../../../src/ol/Map.js';
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import View from '../../../../src/ol/View.js';
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import EventTarget from '../../../../src/ol/events/Target.js';
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import Interaction, {zoomByDelta} from '../../../../src/ol/interaction/Interaction.js';
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import {FALSE} from '../../../../src/ol/functions.js';
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describe('ol.interaction.Interaction', function() {
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describe('constructor', function() {
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let interaction;
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beforeEach(function() {
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interaction = new Interaction({});
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});
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it('creates a new interaction', function() {
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expect(interaction).to.be.a(Interaction);
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expect(interaction).to.be.a(EventTarget);
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});
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it('creates an active interaction', function() {
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expect(interaction.getActive()).to.be(true);
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});
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});
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describe('#getMap()', function() {
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it('retrieves the associated map', function() {
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const map = new Map({});
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const interaction = new Interaction({});
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interaction.setMap(map);
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expect(interaction.getMap()).to.be(map);
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});
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it('returns null if no map', function() {
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const interaction = new Interaction({});
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expect(interaction.getMap()).to.be(null);
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});
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});
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describe('#setMap()', function() {
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it('allows a map to be set', function() {
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const map = new Map({});
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const interaction = new Interaction({});
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interaction.setMap(map);
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expect(interaction.getMap()).to.be(map);
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});
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it('accepts null', function() {
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const interaction = new Interaction({});
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interaction.setMap(null);
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expect(interaction.getMap()).to.be(null);
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});
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});
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describe('#handleEvent()', function() {
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class MockInteraction extends Interaction {
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constructor() {
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super(...arguments);
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}
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handleEvent(mapBrowserEvent) {
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return false;
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}
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}
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it('has a default event handler', function() {
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const interaction = new Interaction({});
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expect(interaction.handleEvent()).to.be(true);
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});
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it('allows event handler overrides via options', function() {
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const interaction = new Interaction({
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handleEvent: FALSE
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});
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expect(interaction.handleEvent()).to.be(false);
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});
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it('allows event handler overrides via class extension', function() {
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const interaction = new MockInteraction({});
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expect(interaction.handleEvent()).to.be(false);
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});
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});
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describe('zoomByDelta()', function() {
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it('changes view resolution', function() {
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const view = new View({
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resolution: 1,
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resolutions: [4, 2, 1, 0.5, 0.25]
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});
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zoomByDelta(view, 1);
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expect(view.getResolution()).to.be(0.5);
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zoomByDelta(view, -1);
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expect(view.getResolution()).to.be(1);
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zoomByDelta(view, 2);
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expect(view.getResolution()).to.be(0.25);
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zoomByDelta(view, -2);
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expect(view.getResolution()).to.be(1);
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});
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it('changes view resolution and center relative to the anchor', function() {
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const view = new View({
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center: [0, 0],
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resolution: 1,
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resolutions: [4, 2, 1, 0.5, 0.25]
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});
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zoomByDelta(view, 1, [10, 10]);
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expect(view.getCenter()).to.eql([5, 5]);
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zoomByDelta(view, -1, [0, 0]);
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expect(view.getCenter()).to.eql([10, 10]);
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zoomByDelta(view, 2, [0, 0]);
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expect(view.getCenter()).to.eql([2.5, 2.5]);
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zoomByDelta(view, -2, [0, 0]);
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expect(view.getCenter()).to.eql([10, 10]);
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});
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it('changes view resolution and center relative to the anchor, while respecting the extent', function() {
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const view = new View({
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center: [0, 0],
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extent: [-2.5, -2.5, 2.5, 2.5],
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resolution: 1,
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resolutions: [4, 2, 1, 0.5, 0.25]
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});
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zoomByDelta(view, 1, [10, 10]);
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expect(view.getCenter()).to.eql([2.5, 2.5]);
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zoomByDelta(view, -1, [0, 0]);
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expect(view.getCenter()).to.eql([2.5, 2.5]);
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zoomByDelta(view, 2, [10, 10]);
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expect(view.getCenter()).to.eql([2.5, 2.5]);
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zoomByDelta(view, -2, [0, 0]);
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expect(view.getCenter()).to.eql([2.5, 2.5]);
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});
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});
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});
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