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Spock - Document -02 - Spock Primer

This chapter assumes that you have a basic knowledge of Groovy and unit testing. If you are a Java developer but haven’t heard about Groovy, don’t worry - Groovy will feel very familiar to you! In fact, one of Groovy’s main design goals is to be the scripting language alongside Java. So just follow along and consult the Groovy documentation whenever you feel like it.

The goals of this chapter are to teach you enough Spock to write real-world Spock specifications, and to whet your appetite for more.

To learn more about Groovy, go to http://groovy-lang.org/.

To learn more about unit testing, go to http://en.wikipedia.org/wiki/Unit_testing.

Terminology

Let’s start with a few definitions: Spock lets you write specifications that describe expected features (properties, aspects) exhibited by a system of interest. The system of interest could be anything between a single class and a whole application, and is also called system under specification (SUS). The description of a feature starts from a specific snapshot of the SUS and its collaborators; this snapshot is called the feature’s fixture.

The following sections walk you through all building blocks of which a Spock specification may be composed. A typical specification uses only a subset of them.

Imports

import spock.lang.*

Package spock.lang contains the most important types for writi