4Test is a test scripting language used by SilkTest to compose test scripts to perform automated tests. 4Test is an object-oriented fourth-generation language. It consists of 3 sets of functionalities:

1. A robust library of object-oriented classes and methods that specify how a testcase can interact with an application’s GUI objects.

2. A set of statements, operators and data types that you use to introduce structure and logic to a recorded testcase.

3. A library of built-in functions for performing common support tasks.