gistfile1.txt

test {
  classpath 'build/classes/main'
  systemProperty 'vertx.test.timeout', 15
  systemProperty 'vertx.mods', "$projectDir/build/tmp/mod-test"
  systemProperty 'vertx.version', "$project.version"
  testLogging.showStandardStreams = true
}

Gives error:


* What went wrong:
A problem occurred evaluating root project 'mod-redis'.
> Could not find method classpath() for arguments [build/classes/main] on root project 'mod-redis'.

In the docs it says classpath is a 'FileCollection' but doesn't tell me how to represent that textually in a task, nor give any examples.

Properties are configured using propertyName = value. FileCollections can be created using the files() method (amongst others).

test {
    classpath = files('build/classes/main')
    ...
}

And for documentation on file collections, you can always check the user guide.

Peter - If I change it to your suggestion I get the following error:

A problem occurred evaluating root project 'mod-redis'.

Cannot cast object '/home/tim/projects/vert-x/mod-redis/build/classes/main' with class 'java.io.File' to class 'org.gradle.api.file.FileCollection'

You should be able to use one of the following to set the classpath property:

classpath = files('build/classes/main')
setClasspath(files('build/classes/main'))
setClasspath files('build/classes/main')

The classpath should default to the runtime classpath and perhaps you only need to add the testClassesDir in your particular case:

testClassesDir = file('build/classes/main');

Thanks, Peter already suggested that, but it doesn't work (see above)

Are you sure you have the 's'? files() returns a FileCollection, file() returns a File.