Test-driven GUI development with FEST

Wow, this is a very interesting framework for JAVA GUI APIs…

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http://code.google.com/p/fest/

Do you want to see FEST in action? Check the article “Test-driven GUI development with FEST” by Alex Ruiz. Video demonstrations and working code examples are included!

FEST is a collection of APIs, released under the Apache 2.0 license, which mission is to simplify software testing. It contains the following modules:

Swing Module:

• DSL-oriented API for functional Swing GUI testing
• Simulation of user-generated events and reliable GUI component lookup
• Easy-to-use and powerful API that simplifies creation and maintenance of Swing GUI functional tests:

    dialog.comboBox("domain").select("Users");
    dialog.textBox("username").enterText("alex.ruiz");
    dialog.button("ok").click();
    dialog.optionPane().requireErrorMessage()
                       .requireMessage("Please enter your password");

• Supports both JUnit and TestNG
• Ability to take screenshots of failed GUI tests and embed them in a HTML report (JUnit and TestNG)
• Experimental Groovy Builder support for creating GUI tests

Assertions Module:

• ‘Flexible’ or ‘fluent’ assertions:

   assertThat(yoda).isInstanceOf(Jedi.class)
                   .isEqualTo(foundJedi)
                   .isNotEqualTo(foundSith);

• Assertions for Object, String, arrays (including primitives), primitives, collections, images and more!
• Assertions can be extended using custom Conditions

Reflection Module:

• ‘Fluent interface‘ for simplifying usage of reflection:

    Person person = constructor().withParameterTypes(String.class)
                                 .in(Person.class)
                                 .newInstance("Yoda");

    method("setName").withParameterTypes(String.class)
                     .in(person)
                     .invoke("Luke");

    field("name").ofType(String.class)
                 .in(person)

                 .set("Anakin");

Mocks Module:

• Eliminates code duplication when using mock objects
• Clearly separates mock expectations from code to test, improving code readability

Project links:

• Documentation
• FishEye
• Ohloh Metrics