`spock-outputcapture`

spock-outputcapture captures System.out and System.err in order to be verified during tests written with the Spock Framework.

It is intended as groovier replacement for Spring Boot OutputCaptureRule, which has been superseed by the OutputCaptureExtension that on the other hand is not working with Spock.

Groovy syntax
Captures both System.out and System.err
Captures logs of the entire Spec via
- @Share @OutputCapture globalLogs
Captures logs per Test
- @OutputCapture localLogs
Working with Spock Framework 2.0, 2.1, 2.2, 2.3 and 2.4-M2

Dependency setup

Gradle build.gradle

build.gradle

dependencies {
    testImplementation 'io.github.joke:spock-outputcapture:x.y.z'
}

Maven pom.xml

<dependencies>
  <dependency>
    <groupId>io.github.joke</groupId>
    <artifactId>spock-outputcapture</artifactId>
    <version>x.y.z</version>
    <scope>test</scope>
  </dependency>
</dependencies>

Usage

Add the output capture to your specification. globalLogs and localLogs will contain logged messages.

Basic setup

// Contains all logs of the entire specification
@Shared @OutputCapture globalLogs

// contains logs the of current feature method only
@OutputCapture localLogs

If you need more control over the logs object you can add the type.

With concrete type

@Shared @OutputCapture CapturedOutput globalLogs
@OutputCapture CapturedOutput localLogs

In most cases you want to perform basic regex matching on the output.

Full example of how to use verify the output.

class LoggingSpec extends Specification {

    @OutputCapture localLogs

    def 'local log contains service name'() {
        setup:
        new LoggingService().logYourName()

        expect:
        localLogs ==~ /(?s).*My name is LoggingService.*/
    }
}