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<!DOCTYPE html>
<html>
<!--
Copyright 2007 The Closure Library Authors. All Rights Reserved.
Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<!--
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.pubsub.PubSub</title>
<script src="../base.js"></script>
<script>
goog.require('goog.array');
goog.require('goog.pubsub.PubSub');
goog.require('goog.testing.jsunit');
</script>
</head>
<body>
<script>
var pubsub;
function setUp() {
pubsub = new goog.pubsub.PubSub();
}
function tearDown() {
pubsub.dispose();
}
function testConstructor() {
assertNotNull('PubSub instance must not be null', pubsub);
assertTrue('PubSub instance must have the expected type',
pubsub instanceof goog.pubsub.PubSub);
}
function testDispose() {
assertFalse('PubSub instance must not have been disposed of',
pubsub.isDisposed());
pubsub.dispose();
assertTrue('PubSub instance must have been disposed of',
pubsub.isDisposed());
}
function testSubscribeUnsubscribe() {
function foo1() {
}
function bar1() {
}
function foo2() {
}
function bar2() {
}
assertEquals('Topic "foo" must not have any subscribers', 0,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must not have any subscribers', 0,
pubsub.getCount('bar'));
pubsub.subscribe("foo", foo1);
assertEquals('Topic "foo" must have 1 subscriber', 1,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must not have any subscribers', 0,
pubsub.getCount('bar'));
pubsub.subscribe("bar", bar1);
assertEquals('Topic "foo" must have 1 subscriber', 1,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have 1 subscriber', 1,
pubsub.getCount('bar'));
pubsub.subscribe("foo", foo2);
assertEquals('Topic "foo" must have 2 subscribers', 2,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have 1 subscriber', 1,
pubsub.getCount('bar'));
pubsub.subscribe("bar", bar2);
assertEquals('Topic "foo" must have 2 subscribers', 2,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have 2 subscribers', 2,
pubsub.getCount('bar'));
assertTrue(pubsub.unsubscribe("foo", foo1));
assertEquals('Topic "foo" must have 1 subscriber', 1,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have 2 subscribers', 2,
pubsub.getCount('bar'));
assertTrue(pubsub.unsubscribe("foo", foo2));
assertEquals('Topic "foo" must have no subscribers', 0,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have 2 subscribers', 2,
pubsub.getCount('bar'));
assertTrue(pubsub.unsubscribe("bar", bar1));
assertEquals('Topic "foo" must have no subscribers', 0,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have 1 subscriber', 1,
pubsub.getCount('bar'));
assertTrue(pubsub.unsubscribe("bar", bar2));
assertEquals('Topic "foo" must have no subscribers', 0,
pubsub.getCount('foo'));
assertEquals('Topic "bar" must have no subscribers', 0,
pubsub.getCount('bar'));
assertFalse('Unsubscribing a nonexistent topic must return false',
pubsub.unsubscribe("baz", foo1));
assertFalse('Unsubscribing a nonexistent function must return false',
pubsub.unsubscribe("foo", function() {}));
}
function testSubscribeUnsubscribeWithContext() {
function foo() {
}
function bar() {
}
var contextA = {};
var contextB = {};
assertEquals('Topic "X" must not have any subscribers', 0,
pubsub.getCount('X'));
pubsub.subscribe('X', foo, contextA);
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
pubsub.subscribe('X', bar);
assertEquals('Topic "X" must have 2 subscribers', 2,
pubsub.getCount('X'));
pubsub.subscribe('X', bar, contextB);
assertEquals('Topic "X" must have 3 subscribers', 3,
pubsub.getCount('X'));
assertFalse('Unknown function/context combination return false',
pubsub.unsubscribe('X', foo, contextB));
assertTrue(pubsub.unsubscribe('X', foo, contextA));
assertEquals('Topic "X" must have 2 subscribers', 2,
pubsub.getCount('X'));
assertTrue(pubsub.unsubscribe('X', bar));
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertTrue(pubsub.unsubscribe('X', bar, contextB));
assertEquals('Topic "X" must have no subscribers', 0,
pubsub.getCount('X'));
}
function testSubscribeOnce() {
var called, context;
called = false;
pubsub.subscribeOnce('someTopic', function() {
called = true;
});
assertEquals('Topic must have one subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('Subscriber must not have been called yet', called);
pubsub.publish('someTopic');
assertEquals('Topic must have no subscribers', 0,
pubsub.getCount('someTopic'));
assertTrue('Subscriber must have been called', called);
context = {called: false};
pubsub.subscribeOnce('someTopic', function() {
this.called = true;
}, context);
assertEquals('Topic must have one subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('Subscriber must not have been called yet', context.called);
pubsub.publish('someTopic');
assertEquals('Topic must have no subscribers', 0,
pubsub.getCount('someTopic'));
assertTrue('Subscriber must have been called', context.called);
context = {called: false, value: 0};
pubsub.subscribeOnce('someTopic', function(value) {
this.called = true;
this.value = value;
}, context);
assertEquals('Topic must have one subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('Subscriber must not have been called yet', context.called);
assertEquals('Value must have expected value', 0, context.value);
pubsub.publish('someTopic', 17);
assertEquals('Topic must have no subscribers', 0,
pubsub.getCount('someTopic'));
assertTrue('Subscriber must have been called', context.called);
assertEquals('Value must have been updated', 17, context.value);
}
function testSubscribeOnce_boundFn() {
var context = {called: false, value: 0};
function subscriber(value) {
this.called = true;
this.value = value;
}
pubsub.subscribeOnce('someTopic', goog.bind(subscriber, context));
assertEquals('Topic must have one subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('Subscriber must not have been called yet', context.called);
assertEquals('Value must have expected value', 0, context.value);
pubsub.publish('someTopic', 17);
assertEquals('Topic must have no subscribers', 0,
pubsub.getCount('someTopic'));
assertTrue('Subscriber must have been called', context.called);
assertEquals('Value must have been updated', 17, context.value);
}
function testSubscribeOnce_partialFn() {
var called = false;
var value = 0;
function subscriber(hasBeenCalled, newValue) {
called = hasBeenCalled;
value = newValue;
}
pubsub.subscribeOnce('someTopic', goog.partial(subscriber, true));
assertEquals('Topic must have one subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('Subscriber must not have been called yet', called);
assertEquals('Value must have expected value', 0, value);
pubsub.publish('someTopic', 17);
assertEquals('Topic must have no subscribers', 0,
pubsub.getCount('someTopic'));
assertTrue('Subscriber must have been called', called);
assertEquals('Value must have been updated', 17, value);
}
function testSelfResubscribe() {
var value = null;
function resubscribe(iteration, newValue) {
pubsub.subscribeOnce('someTopic',
goog.partial(resubscribe, iteration + 1));
value = newValue + ':' + iteration;
}
pubsub.subscribeOnce('someTopic', goog.partial(resubscribe, 0));
assertEquals('Topic must have 1 subscriber', 1,
pubsub.getCount('someTopic'));
assertNull('Value must be null', value);
pubsub.publish('someTopic', 'foo');
assertEquals('Topic must have 1 subscriber', 1,
pubsub.getCount('someTopic'));
assertEquals('Pubsub must not have any pending unsubscribe keys', 0,
pubsub.pendingKeys_.length);
assertEquals('Value be as expected', 'foo:0', value);
pubsub.publish('someTopic', 'bar');
assertEquals('Topic must have 1 subscriber', 1,
pubsub.getCount('someTopic'));
assertEquals('Pubsub must not have any pending unsubscribe keys', 0,
pubsub.pendingKeys_.length);
assertEquals('Value be as expected', 'bar:1', value);
pubsub.publish('someTopic', 'baz');
assertEquals('Topic must have 1 subscriber', 1,
pubsub.getCount('someTopic'));
assertEquals('Pubsub must not have any pending unsubscribe keys', 0,
pubsub.pendingKeys_.length);
assertEquals('Value be as expected', 'baz:2', value);
}
function testUnsubscribeByKey() {
var key1, key2, key3;
key1 = pubsub.subscribe('X', function() {});
key2 = pubsub.subscribe('Y', function() {});
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 1 subscriber', 1,
pubsub.getCount('Y'));
assertNotEquals('Subscription keys must be distinct', key1, key2);
pubsub.unsubscribeByKey(key1);
assertEquals('Topic "X" must have no subscribers', 0,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 1 subscriber', 1,
pubsub.getCount('Y'));
key3 = pubsub.subscribe('X', function() {});
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 1 subscriber', 1,
pubsub.getCount('Y'));
assertNotEquals('Subscription keys must be distinct', key1, key3);
assertNotEquals('Subscription keys must be distinct', key2, key3);
pubsub.unsubscribeByKey(key1); // Obsolete key; should be no-op.
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 1 subscriber', 1,
pubsub.getCount('Y'));
pubsub.unsubscribeByKey(key2);
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have no subscribers', 0,
pubsub.getCount('Y'));
pubsub.unsubscribeByKey(key3);
assertEquals('Topic "X" must have no subscribers', 0,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have no subscribers', 0,
pubsub.getCount('Y'));
}
function testSubscribeUnsubscribeMultiple() {
function foo() {
}
function bar() {
}
var context = {};
assertEquals('Pubsub channel must not have any subscribers', 0,
pubsub.getCount());
assertEquals('Topic "X" must not have any subscribers', 0,
pubsub.getCount('X'));
assertEquals('Topic "Y" must not have any subscribers', 0,
pubsub.getCount('Y'));
assertEquals('Topic "Z" must not have any subscribers', 0,
pubsub.getCount('Z'));
goog.array.forEach(['X', 'Y', 'Z'], function(topic) {
pubsub.subscribe(topic, foo);
});
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 1 subscriber', 1,
pubsub.getCount('Y'));
assertEquals('Topic "Z" must have 1 subscriber', 1,
pubsub.getCount('Z'));
goog.array.forEach(['X', 'Y', 'Z'], function(topic) {
pubsub.subscribe(topic, bar, context);
});
assertEquals('Topic "X" must have 2 subscribers', 2,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 2 subscribers', 2,
pubsub.getCount('Y'));
assertEquals('Topic "Z" must have 2 subscribers', 2,
pubsub.getCount('Z'));
assertEquals('Pubsub channel must have a total of 6 subscribers', 6,
pubsub.getCount());
goog.array.forEach(['X', 'Y', 'Z'], function(topic) {
pubsub.unsubscribe(topic, foo);
});
assertEquals('Topic "X" must have 1 subscriber', 1,
pubsub.getCount('X'));
assertEquals('Topic "Y" must have 1 subscriber', 1,
pubsub.getCount('Y'));
assertEquals('Topic "Z" must have 1 subscriber', 1,
pubsub.getCount('Z'));
goog.array.forEach(['X', 'Y', 'Z'], function(topic) {
pubsub.unsubscribe(topic, bar, context);
});
assertEquals('Topic "X" must not have any subscribers', 0,
pubsub.getCount('X'));
assertEquals('Topic "Y" must not have any subscribers', 0,
pubsub.getCount('Y'));
assertEquals('Topic "Z" must not have any subscribers', 0,
pubsub.getCount('Z'));
assertEquals('Pubsub channel must not have any subscribers', 0,
pubsub.getCount());
}
function testPublish() {
var context = {};
var fooCalled = false;
var barCalled = false;
function foo(x, y) {
fooCalled = true;
assertEquals('x must have expected value', 'x', x);
assertEquals('y must have expected value', 'y', y);
}
function bar(x, y) {
barCalled = true;
assertEquals('Context must have expected value', context, this);
assertEquals('x must have expected value', 'x', x);
assertEquals('y must have expected value', 'y', y);
}
pubsub.subscribe('someTopic', foo);
pubsub.subscribe('someTopic', bar, context);
assertTrue(pubsub.publish('someTopic', 'x', 'y'));
assertTrue('foo() must have been called', fooCalled);
assertTrue('bar() must have been called', barCalled);
fooCalled = false;
barCalled = false;
assertTrue(pubsub.unsubscribe('someTopic', foo));
assertTrue(pubsub.publish('someTopic', 'x', 'y'));
assertFalse('foo() must not have been called', fooCalled);
assertTrue('bar() must have been called', barCalled);
fooCalled = false;
barCalled = false;
pubsub.subscribe('differentTopic', foo);
assertTrue(pubsub.publish('someTopic', 'x', 'y'));
assertFalse('foo() must not have been called', fooCalled);
assertTrue('bar() must have been called', barCalled);
}
function testPublishEmptyTopic() {
var fooCalled = false;
function foo() {
fooCalled = true;
}
assertFalse('Publishing to nonexistent topic must return false',
pubsub.publish('someTopic'));
pubsub.subscribe('someTopic', foo);
assertTrue('Publishing to topic with subscriber must return true',
pubsub.publish('someTopic'));
assertTrue('Foo must have been called', fooCalled);
pubsub.unsubscribe('someTopic', foo);
fooCalled = false;
assertFalse('Publishing to topic without subscribers must return false',
pubsub.publish('someTopic'));
assertFalse('Foo must nothave been called', fooCalled);
}
function testSubscribeWhilePublishing() {
// It's OK for a subscriber to add a new subscriber to its own topic,
// but the newly added subscriber shouldn't be called until the next
// publish cycle.
var firstCalled = false;
var secondCalled = false;
pubsub.subscribe('someTopic', function() {
pubsub.subscribe('someTopic', function() {
secondCalled = true;
});
firstCalled = true;
});
assertEquals('Topic must have one subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('No subscriber must have been called yet',
firstCalled || secondCalled);
pubsub.publish('someTopic');
assertEquals('Topic must have two subscribers', 2,
pubsub.getCount('someTopic'));
assertTrue('The first subscriber must have been called',
firstCalled);
assertFalse('The second subscriber must not have been called yet',
secondCalled);
pubsub.publish('someTopic');
assertEquals('Topic must have three subscribers', 3,
pubsub.getCount('someTopic'));
assertTrue('The first subscriber must have been called',
firstCalled);
assertTrue('The second subscriber must also have been called',
secondCalled);
}
function testUnsubscribeWhilePublishing() {
// It's OK for a subscriber to unsubscribe another subscriber from its
// own topic, but the subscriber in question won't actually be removed
// until after publishing is complete.
var firstCalled = false;
var secondCalled = false;
var thirdCalled = false;
function first() {
assertFalse('unsubscribe() must return false during publishing',
pubsub.unsubscribe('X', second));
assertEquals('Topic "X" must still have 3 subscribers', 3,
pubsub.getCount('X'));
firstCalled = true;
}
pubsub.subscribe('X', first);
function second() {
assertEquals('Topic "X" must still have 3 subscribers', 3,
pubsub.getCount('X'));
secondCalled = true;
}
pubsub.subscribe('X', second);
function third() {
assertFalse('unsubscribe() must return false during publishing',
pubsub.unsubscribe('X', first));
assertEquals('Topic "X" must still have 3 subscribers', 3,
pubsub.getCount('X'));
thirdCalled = true;
}
pubsub.subscribe('X', third);
assertEquals('Topic "X" must have 3 subscribers', 3,
pubsub.getCount('X'));
assertFalse('No subscribers must have been called yet',
firstCalled || secondCalled || thirdCalled);
assertTrue(pubsub.publish('X'));
assertTrue('First function must have been called', firstCalled);
assertTrue('Second function must have been called', secondCalled);
assertTrue('Third function must have been called', thirdCalled);
assertEquals('Topic "X" must have 1 subscriber after publishing', 1,
pubsub.getCount('X'));
assertEquals('PubSub must not have any subscriptions pending removal', 0,
pubsub.pendingKeys_.length);
}
function testUnsubscribeSelfWhilePublishing() {
// It's OK for a subscriber to unsubscribe itself, but it won't actually
// be removed until after publishing is complete.
var selfDestructCalled = false;
function selfDestruct() {
assertFalse('unsubscribe() must return false during publishing',
pubsub.unsubscribe('someTopic', arguments.callee));
assertEquals('Topic must still have 1 subscriber', 1,
pubsub.getCount('someTopic'));
selfDestructCalled = true;
}
pubsub.subscribe('someTopic', selfDestruct);
assertEquals('Topic must have 1 subscriber', 1,
pubsub.getCount('someTopic'));
assertFalse('selfDestruct() must not have been called yet',
selfDestructCalled);
pubsub.publish('someTopic');
assertTrue('selfDestruct() must have been called', selfDestructCalled);
assertEquals('Topic must have no subscribers after publishing', 0,
pubsub.getCount('someTopic'));
assertEquals('PubSub must not have any subscriptions pending removal', 0,
pubsub.pendingKeys_.length);
}
function testPublishReturnValue() {
pubsub.subscribe('X', function() {
pubsub.unsubscribe('X', arguments.callee);
});
assertTrue('publish() must return true even if the only subscriber ' +
'removes itself during publishing', pubsub.publish('X'));
}
function testNestedPublish() {
var x1 = false;
var x2 = false;
var y1 = false;
var y2 = false;
pubsub.subscribe('X', function() {
pubsub.publish('Y');
pubsub.unsubscribe('X', arguments.callee);
x1 = true;
});
pubsub.subscribe('X', function() {
x2 = true;
});
pubsub.subscribe('Y', function() {
pubsub.unsubscribe('Y', arguments.callee);
y1 = true;
});
pubsub.subscribe('Y', function() {
y2 = true;
});
pubsub.publish('X');
assertTrue('x1 must be true', x1);
assertTrue('x2 must be true', x2);
assertTrue('y1 must be true', y1);
assertTrue('y2 must be true', y2);
}
function testClear() {
function fn() {
}
goog.array.forEach(['W', 'X', 'Y', 'Z'], function(topic) {
pubsub.subscribe(topic, fn);
});
assertEquals('Pubsub channel must have 4 subscribers', 4,
pubsub.getCount());
pubsub.clear('W');
assertEquals('Pubsub channel must have 3 subscribers', 3,
pubsub.getCount());
goog.array.forEach(['X', 'Y'], function(topic) {
pubsub.clear(topic);
});
assertEquals('Pubsub channel must have 1 subscriber', 1,
pubsub.getCount());
pubsub.clear();
assertEquals('Pubsub channel must have no subscribers', 0,
pubsub.getCount());
}
</script>
</body>
</html>
|
