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<!DOCTYPE html>
<html>
<!--
Copyright 2008 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.
-->
<!-- Author: attila@google.com (Attila Bodis) -->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.Disposable</title>
<script src="../base.js"></script>
<script>
goog.require('goog.Disposable');
goog.require('goog.testing.jsunit');
goog.require('goog.testing.recordFunction');
</script>
</head>
<body>
<div id="someElement">Hello!</div>
<script>
var d1, d2;
// Sample subclass of goog.Disposable.
function DisposableTest() {
goog.Disposable.call(this);
this.element = document.getElementById('someElement');
}
goog.inherits(DisposableTest, goog.Disposable);
DisposableTest.prototype.disposeInternal = function() {
DisposableTest.superClass_.disposeInternal.call(this);
delete this.element;
};
// Class that doesn't inherit from goog.Disposable, but implements the
// disposable interface via duck typing.
function DisposableDuck() {
this.element = document.getElementById('someElement');
}
DisposableDuck.prototype.dispose = function() {
delete this.element;
};
// Class which calls dispose recursively.
function RecursiveDisposable() {
this.disposedCount = 0;
}
goog.inherits(RecursiveDisposable, goog.Disposable);
RecursiveDisposable.prototype.disposeInternal = function() {
++this.disposedCount;
assertEquals('Disposed too many times', 1, this.disposedCount);
this.dispose();
};
// Test methods.
function setUp() {
d1 = new goog.Disposable();
d2 = new DisposableTest();
}
function tearDown() {
goog.Disposable.MONITORING_MODE = goog.Disposable.MonitoringMode.OFF;
goog.Disposable.instances_ = {};
d1.dispose();
d2.dispose();
}
function testConstructor() {
assertFalse(d1.isDisposed());
assertFalse(d2.isDisposed());
assertEquals(document.getElementById('someElement'), d2.element);
}
function testDispose() {
assertFalse(d1.isDisposed());
d1.dispose();
assertTrue('goog.Disposable instance should have been disposed of',
d1.isDisposed());
assertFalse(d2.isDisposed());
d2.dispose();
assertTrue('goog.DisposableTest instance should have been disposed of',
d2.isDisposed());
}
function testDisposeInternal() {
assertNotUndefined(d2.element);
d2.dispose();
assertUndefined('goog.DisposableTest.prototype.disposeInternal should ' +
'have deleted the element reference', d2.element);
}
function testDisposeAgain() {
d2.dispose();
assertUndefined('goog.DisposableTest.prototype.disposeInternal should ' +
'have deleted the element reference', d2.element);
// Manually reset the element to a non-null value, and call dispose().
// Because the object is already marked disposed, disposeInternal won't
// be called again.
d2.element = document.getElementById('someElement');
d2.dispose();
assertNotUndefined('disposeInternal should not be called again if the ' +
'object has already been marked disposed', d2.element);
}
function testDisposeWorksRecursively() {
new RecursiveDisposable().dispose();
}
function testStaticDispose() {
assertFalse(d1.isDisposed());
goog.dispose(d1);
assertTrue('goog.Disposable instance should have been disposed of',
d1.isDisposed());
assertFalse(d2.isDisposed());
goog.dispose(d2);
assertTrue('goog.DisposableTest instance should have been disposed of',
d2.isDisposed());
var duck = new DisposableDuck();
assertNotUndefined(duck.element);
goog.dispose(duck);
assertUndefined('goog.dispose should have disposed of object that ' +
'implements the disposable interface', duck.element);
}
function testStaticDisposeOnNonDisposableType() {
// Call goog.dispose() with various types and make sure no errors are
// thrown.
goog.dispose(true);
goog.dispose(false);
goog.dispose(null);
goog.dispose(undefined);
goog.dispose('');
goog.dispose([]);
goog.dispose({});
function A() {}
goog.dispose(new A());
}
function testMonitoringFailure() {
function BadDisposable() {};
goog.inherits(BadDisposable, goog.Disposable);
goog.Disposable.MONITORING_MODE =
goog.Disposable.MonitoringMode.PERMANENT;
var badDisposable = new BadDisposable;
assertArrayEquals('no disposable objects registered', [],
goog.Disposable.getUndisposedObjects());
assertThrows('the base ctor should have been called',
goog.bind(badDisposable.dispose, badDisposable));
}
function testGetUndisposedObjects() {
goog.Disposable.MONITORING_MODE =
goog.Disposable.MonitoringMode.PERMANENT;
var d1 = new DisposableTest();
var d2 = new DisposableTest();
assertSameElements('the undisposed instances', [d1, d2],
goog.Disposable.getUndisposedObjects());
d1.dispose();
assertSameElements('1 undisposed instance left', [d2],
goog.Disposable.getUndisposedObjects());
d1.dispose();
assertSameElements('second disposal of the same object is no-op', [d2],
goog.Disposable.getUndisposedObjects());
d2.dispose();
assertSameElements('all objects have been disposed of', [],
goog.Disposable.getUndisposedObjects());
}
function testClearUndisposedObjects() {
goog.Disposable.MONITORING_MODE =
goog.Disposable.MonitoringMode.PERMANENT;
var d1 = new DisposableTest();
var d2 = new DisposableTest();
d2.dispose();
goog.Disposable.clearUndisposedObjects()
assertSameElements('no undisposed object in the registry', [],
goog.Disposable.getUndisposedObjects());
assertThrows('disposal after clearUndisposedObjects()', function() {
d1.dispose();
});
// d2 is already disposed of, the redisposal shouldn't throw error.
d2.dispose();
}
function testRegisterDisposable() {
var d1 = new DisposableTest();
var d2 = new DisposableTest();
d1.registerDisposable(d2);
d1.dispose();
assertTrue('d2 should be disposed when d1 is disposed', d2.isDisposed());
}
function testDisposeAll() {
var d1 = new DisposableTest();
var d2 = new DisposableTest();
goog.disposeAll(d1, d2);
assertTrue('d1 should be disposed', d1.isDisposed());
assertTrue('d2 should be disposed', d2.isDisposed());
}
function testDisposeAllRecursive() {
var d1 = new DisposableTest();
var d2 = new DisposableTest();
var d3 = new DisposableTest();
var d4 = new DisposableTest();
goog.disposeAll(d1, [[d2], d3, d4]);
assertTrue('d1 should be disposed', d1.isDisposed());
assertTrue('d2 should be disposed', d2.isDisposed());
assertTrue('d3 should be disposed', d3.isDisposed());
assertTrue('d4 should be disposed', d4.isDisposed());
}
function testCreationStack() {
if (!new Error().stack)
return;
goog.Disposable.MONITORING_MODE =
goog.Disposable.MonitoringMode.PERMANENT;
var disposableStack = new DisposableTest().creationStack;
// Check that the name of this test function occurs in the stack trace.
assertNotEquals(-1, disposableStack.indexOf('testCreationStack'));
}
function testOnDisposeCallback() {
var callback = goog.testing.recordFunction();
d1.addOnDisposeCallback(callback);
assertEquals('callback called too early', 0, callback.getCallCount());
d1.dispose();
assertEquals('callback should be called once on dispose',
1, callback.getCallCount());
}
function testOnDisposeCallbackOrder() {
var invocations = [];
var callback = function(str) {
invocations.push(str);
};
d1.addOnDisposeCallback(goog.partial(callback, 'a'));
d1.addOnDisposeCallback(goog.partial(callback, 'b'));
goog.dispose(d1);
assertArrayEquals('callbacks should be called in chronological order',
['a', 'b'], invocations);
}
function testInteractiveMonitoring() {
var d1 = new DisposableTest();
goog.Disposable.MONITORING_MODE =
goog.Disposable.MonitoringMode.INTERACTIVE;
var d2 = new DisposableTest();
assertSameElements('only 1 undisposed instance tracked', [d2],
goog.Disposable.getUndisposedObjects());
// No errors should be thrown.
d1.dispose();
assertSameElements('1 undisposed instance left', [d2],
goog.Disposable.getUndisposedObjects());
d2.dispose();
assertSameElements('all disposed', [],
goog.Disposable.getUndisposedObjects());
}
</script>
</body>
</html>
|
