Why we have to specify useTestNG() for tests with Gradle?

Question

If we want to use for our test TestNG we have to write something like:

dependencies {
   compile project(':model')
   testCompile 'org.testng:testng:6.8'
}

test.useTestNG()

But when using Spock we specify just the dependency

dependencies {
   compile project(':model')
   testCompile 'org.spockframework:spock-core:0.7-groovy-2.0'
}

Why we have to specify test.useTestNG()?

Courthouse

Answer 1

Spock tests get run via JUnit, which is the Gradle default. Alternatively, tests can be run via TestNG.

Sarcomatosis

So test.useTestNG() is used to change the default Gradle test framework? Now I checked that there is test.useJUnit() why is this needed if JUnit is the default? – Courthouse

useJUnit { ... } is only needed if JUnit-specific options need to be configured. useTestNG() is needed to switch to TestNG, and also to configure TestNG-specific options. – Sarcomatosis

Thank, but I will continue with stupid questions (blush) if we want to use TestNG, JUnit and Spock at the same time? How to tell Gradle to use them at the same time if I write useJunit,useTestNG, the second will be the last configuration which will be taken into account? – Courthouse

You need separate Test tasks for that. – Sarcomatosis

Something like task testNGTask(type: Test) { useTestNG() } Thanks. – Courthouse