224 lines
8.3 KiB
JavaScript
224 lines
8.3 KiB
JavaScript
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goog.require('ol.events');
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goog.require('ol.events.EventTarget');
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describe('ol.events', function() {
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var add, remove, target;
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beforeEach(function() {
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add = sinon.spy();
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remove = sinon.spy();
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target = {
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addEventListener: add,
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removeEventListener: remove
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};
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});
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describe('bindListener_()', function() {
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it('binds a listener and returns a bound listener function', function() {
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var listenerObj = {
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listener: sinon.spy(),
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bindTo: {id: 1}
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};
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var boundListener = ol.events.bindListener_(listenerObj);
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expect(listenerObj.boundListener).to.equal(boundListener);
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boundListener();
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expect(listenerObj.listener.thisValues[0]).to.equal(listenerObj.bindTo);
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});
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it('binds to the target when bindTo is not provided', function() {
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var listenerObj = {
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listener: sinon.spy(),
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target: {id: 1}
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};
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var boundListener = ol.events.bindListener_(listenerObj);
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expect(listenerObj.boundListener).to.equal(boundListener);
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boundListener();
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expect(listenerObj.listener.thisValues[0]).to.equal(listenerObj.target);
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});
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it('binds a self-unregistering listener when callOnce is true', function() {
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var bindTo = {id: 1};
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var listenerObj = {
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type: 'foo',
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target: target,
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bindTo: bindTo,
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callOnce: true
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};
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var unlistenSpy = sinon.spy(ol.events, 'unlistenByKey'); // eslint-disable-line openlayers-internal/no-missing-requires
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listenerObj.listener = function() {
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expect(this).to.equal(bindTo);
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expect(unlistenSpy.firstCall.args[0]).to.eql(listenerObj);
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};
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var boundListener = ol.events.bindListener_(listenerObj);
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expect(listenerObj.boundListener).to.equal(boundListener);
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boundListener();
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unlistenSpy.restore();
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});
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});
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describe('findListener_()', function() {
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var listener, listenerObj, listeners;
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beforeEach(function() {
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listener = function() {};
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listenerObj = {
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type: 'foo',
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target: target,
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listener: listener
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};
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listeners = [listenerObj];
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});
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it('searches a listener array for a specific listener', function() {
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var bindTo = {id: 1};
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var result = ol.events.findListener_(listeners, listener);
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expect(result).to.be(listenerObj);
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result = ol.events.findListener_(listeners, listener, bindTo);
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expect(result).to.be(undefined);
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listenerObj.bindTo = bindTo;
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result = ol.events.findListener_(listeners, listener);
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expect(result).to.be(undefined);
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result = ol.events.findListener_(listeners, listener, bindTo);
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expect(result).to.be(listenerObj);
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});
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it('marks the delete index on a listener object', function() {
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var result = ol.events.findListener_(listeners, listener, undefined, true);
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expect(result).to.be(listenerObj);
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expect(listenerObj.deleteIndex).to.be(0);
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});
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});
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describe('getListeners()', function() {
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it('returns listeners for a target and type', function() {
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var foo = ol.events.listen(target, 'foo', function() {});
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var bar = ol.events.listen(target, 'bar', function() {});
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expect (ol.events.getListeners(target, 'foo')).to.eql([foo]);
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expect (ol.events.getListeners(target, 'bar')).to.eql([bar]);
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});
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it('returns undefined when no listeners are registered', function() {
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expect (ol.events.getListeners(target, 'foo')).to.be(undefined);
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});
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});
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describe('listen()', function() {
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it('calls addEventListener on the target', function() {
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ol.events.listen(target, 'foo', function() {});
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expect(add.callCount).to.be(1);
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});
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it('returns a key', function() {
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var key = ol.events.listen(target, 'foo', function() {});
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expect(key).to.be.a(Object);
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});
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it('does not add the same listener twice', function() {
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var listener = function() {};
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var key1 = ol.events.listen(target, 'foo', listener);
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var key2 = ol.events.listen(target, 'foo', listener);
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expect(key1).to.equal(key2);
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expect(add.callCount).to.be(1);
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});
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it('only treats listeners as same when all args are equal', function() {
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var listener = function() {};
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ol.events.listen(target, 'foo', listener, {});
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ol.events.listen(target, 'foo', listener, {});
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ol.events.listen(target, 'foo', listener, undefined);
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expect(add.callCount).to.be(3);
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});
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});
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describe('listenOnce()', function() {
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it('creates a one-off listener', function() {
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var listener = sinon.spy();
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var key = ol.events.listenOnce(target, 'foo', listener);
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expect(add.callCount).to.be(1);
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expect(key.callOnce).to.be(true);
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key.boundListener();
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expect(listener.callCount).to.be(1);
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expect(remove.callCount).to.be(1);
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});
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it('does not add the same listener twice', function() {
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var listener = function() {};
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var key1 = ol.events.listenOnce(target, 'foo', listener);
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var key2 = ol.events.listenOnce(target, 'foo', listener);
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expect(key1).to.equal(key2);
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expect(add.callCount).to.be(1);
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expect(key1.callOnce).to.be(true);
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});
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it('listen() can turn a one-off listener into a permanent one', function() {
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var listener = sinon.spy();
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var key = ol.events.listenOnce(target, 'foo', listener);
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expect(key.callOnce).to.be(true);
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key = ol.events.listen(target, 'foo', listener);
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expect(add.callCount).to.be(1);
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expect(key.callOnce).to.be(false);
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key.boundListener();
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expect(remove.callCount).to.be(0);
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});
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});
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describe('unlisten()', function() {
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it('unregisters previously registered listeners', function() {
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var listener = function() {};
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ol.events.listen(target, 'foo', listener);
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ol.events.unlisten(target, 'foo', listener);
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expect(ol.events.getListeners(target, 'foo')).to.be(undefined);
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});
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it('works with multiple types', function() {
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var listener = function() {};
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ol.events.listen(target, ['foo', 'bar'], listener);
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ol.events.unlisten(target, ['bar', 'foo'], listener);
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expect(ol.events.getListeners(target, 'foo')).to.be(undefined);
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expect(ol.events.getListeners(target, 'bar')).to.be(undefined);
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});
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});
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describe('unlistenByKey()', function() {
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it('unregisters previously registered listeners', function() {
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var key = ol.events.listen(target, 'foo', function() {});
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ol.events.unlistenByKey(key);
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expect(ol.events.getListeners(target, 'foo')).to.be(undefined);
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});
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it('works with multiple types', function() {
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var key = ol.events.listen(target, ['foo', 'bar'], function() {});
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ol.events.unlistenByKey(key);
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expect(ol.events.getListeners(target, 'foo')).to.be(undefined);
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expect(ol.events.getListeners(target, 'bar')).to.be(undefined);
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});
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});
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describe('unlistenAll()', function() {
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it('unregisters all listeners registered for a target', function() {
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var keys = [
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ol.events.listen(target, 'foo', function() {}),
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ol.events.listen(target, 'bar', function() {})
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];
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ol.events.unlistenAll(target);
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expect(ol.events.getListeners(target, 'foo')).to.be(undefined);
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expect(ol.events.getListeners(target, 'bar')).to.be(undefined);
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expect('ol_lm' in target).to.be(false);
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expect(keys).to.eql([{}, {}]);
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});
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});
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describe('Compatibility with ol.events.EventTarget', function() {
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it('does not register duplicated listeners', function() {
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var target = new ol.events.EventTarget();
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var listener = function() {};
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var key1 = ol.events.listen(target, 'foo', listener);
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expect(target.getListeners('foo')).to.eql([key1.boundListener]);
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var key2 = ol.events.listen(target, 'foo', listener);
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expect(key2.boundListener).to.equal(key1.boundListener);
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expect(target.getListeners('foo')).to.eql([key1.boundListener]);
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});
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it('registers multiple listeners if this object is different', function() {
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var target = new ol.events.EventTarget();
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var listener = function() {};
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var key1 = ol.events.listen(target, 'foo', listener, {});
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var key2 = ol.events.listen(target, 'foo', listener, {});
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expect(key1.boundListener).to.not.equal(key2.boundListener);
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expect(target.getListeners('foo')).to.eql(
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[key1.boundListener, key2.boundListener]);
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});
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});
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});
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