Breeze Test is a library for unit testing Adobe AIR applications. It is designed to be simple and intuitive while providing support for asynchronous testing.
You can download the latest SWC file from the releases section of this repo.
Alternatively you can compile the SWC yourself using the included ANT script in the build directory.
The repo includes automated tests in the test directory that allow BreezeTest to test itself.
Testing requires one or more test suites. A test suite is a generic class containing methods that run tests. Test methods must be public methods that begin with the word test and generally should have descriptive names. Any uncaught exception that occurs within test methods will cause that test to fail.
public class TestUsers
{
public function testUserCreated():void
{
// Add tests here
Assert.isTrue(true);
}
public function testUserPasswordReset():void
{
// More tests here
Assert.isFalse(false);
}
public function helperMethod():void
{
// This won't be run as a test since it does not start with "test"
}
}If you need to run code at the beginning or end of a test suite add the methods setupClass and tearDownClass. Alternatively the methods setup and tearDown will run before/after every test method is run.
public class TestUsers
{
public function setupClass():void
{
// Called before tests are run
}
public function tearDownClass():void
{
// Called after all tests are run
}
public function setup():void
{
// Called before each test method
}
public function tearDown():void
{
// Called after each test method
}
}If you need to run an asynchronous operation in the setup / tearDown methods, add a parameter with type Async. Once the asynchronous operation finishes, call the complete method of the Async object.
Furthermore, you can define a public member variable of type Async which will automatically reference the current Async object (i.e. the one passed to the asynchronous method via parameter). This allows you to complete the asynchronous operation outside of the setup / tearDown methods without having to manually store the reference to the Async object.
public class TestUsers
{
// Automatically set by Breeze Test during each async method call
public var currentAsync:Async;
public function setupClass(async:Async):void
{
// Asynchronous class setup
// ...
setTimeout(asyncClassSetupComplete, 100);
}
private function asyncClassSetupComplete():void
{
// Calling 'complete' method of the public variable will finish the class setup
currentAsync.complete();
}
public function tearDownClass(async:Async):void
{
// Asynchronous class tear down
// ...
async.complete();
}
public function setup(async:Async):void
{
// Asynchronous test setup
// ...
async.complete();
}
public function tearDown(async:Async):void
{
// Asynchronous test tear down
// ...
async.complete();
}
}You can run a single or multiple test suites using the BreezeTest class. Add test suites using the add method and begin running tests using the run method. You should also listen for the event BreezeTestEvent.TESTS_COMPLETE so you know when the tests are done.
Note you must provide a reference to your root DisplayObject (i.e. instance of your document class) when creating BreezeTest object. This is required so that Breeze Test is able to catch any uncaught errors occurring in asynchronous functions.
// 'this' refers to the root DisplayObject
var breezeTest:BreezeTest = new BreezeTest(this);
breezeTest.addEventListener(BreezeTestEvent.TESTS_COMPLETE, onTestsComplete);
// Add a single test suite
breezeTest.add(TestUsers);
// Or add multiple tests suites
breezeTest.add([TestUploads, TestEmails]);
// Begin running tests
breezeTest.run();BreezeTest was designed to be run using the AIR Debug Launcher so any trace output will automatically be printed to the console. You can extend the BreezeTestOutput class to handle different output formats.
var breezeTest:BreezeTest = new BreezeTest();
breezeTest.output = new MyCustomOutputClass();The run method will run each test suite and trace out the results. After all test suites have been run, the output will print either TESTS FAILED or TESTS PASSED.
When running tests with a build script you should exit the application with a non-zero output if a test fails.
private function onTestsComplete(event:BreezeTestEvent):void
{
NativeApplication.nativeApplication.exit(_breezeTest.success ? 0 : 1);
}A powerful feature of BreezeTest is the ability to test asynchronous methods using callback functions or event listeners.
Signal that a test method is asynchronous by adding a parameter with type Async. You must call the complete method when the test is complete.
function testAsync(async:Async):void
{
async.complete();
}You can limit the amount of time an asynchronous method can run by setting the timeout property. If the complete method is not called within the specified time then the test will fail.
// Allow the test to run for 2000 milliseconds
async.timeout = 2000;When testing event listeners, you will usually create event handlers outside of your test methods where you no longer have a reference to the Async object. You can however define a public member variable of type Async which will automatically reference the current Async object (i.e. the one passed to the test method via parameter). This allows you to complete the asynchronous test outside of the test method without having to manually store the reference to the Async object.
// Automatically set by Breeze Test during each async method call
public var currentAsync:Async;
private function handleEvent(event:Event):void
{
Assert.isNotNull(event);
// Calling 'complete' method of the public variable will finish the test
currentAsync.complete();
}
public function testEventListener(async:Async):void
{
var obj:MyTestObject = new MyTestObject();
obj.addEventListener(Event.COMPLETE, handleEvent);
}Test methods can utilize the Assert class to verify values conform to expected values. A failed assert call will throw an exception and cause the test to fail.
public function testAssertIsTrue():void
{
var myVariable:Boolean = true;
Assert.isTrue(myVariable);
}Each assert can also provide an optional message to give more context to the assertion.
Assert.isTrue(myVariable, "The myVariable variable should be true");Assert.isTrue(value);
Assert.isFalse(value);Assert.isNull(value);
Assert.isNotNull(value);Assert.equals(expectedValue, actualValue);
Assert.notEquals(expectedValue, actualValue);Assert.isUndefined(value);
Assert.isNotUndefined(value);These methods compare the contents of two arrays using a simple equality test (e.g. ==) for each value within the array. Note that this does not compare if the two arrays or the array contents are comprised of the same objects (e.g. ===).
Assert.arrayEquals(expectedArray, actualArray);
Assert.arrayNotEquals(expectedArray, actualArray);These methods compare if two objects are identical (e.g. ===).
Assert.same(expectedValue, actualValue);
Assert.notSame(expectedValue, actualValue);You can check if an object is of a specific type using this method.
Assert.isType(object, classType);For example:
var myObject:String = "Hello, world";
Assert.isType(myObject, "String");You can verify that a function will throw an exception using the throwsError method. This method will catch the exception and verify the error type.
Assert.throwsError(function, errorType);For example:
Assert.throwsError(function():void
{
throw new Error("My Error");
}, Error);You can also ignore the exception type and only verify that any exception was thrown:
Assert.throwsError(function():void
{
throw new Error("My Error");
});You can force a test to fail by calling fail method:
Assert.fail(message);