spring-framework/buildSrc/build.gradle

plugins {
	id 'java-gradle-plugin'
}

repositories {
	mavenCentral()
}

dependencies {
	testImplementation 'junit:junit:4.12'
	testImplementation 'org.assertj:assertj-core:3.11.1'
}

gradlePlugin {
	plugins {
		testSourcesPlugin {
			id = "org.springframework.build.test-sources"
			implementationClass = "org.springframework.build.testsources.TestSourcesPlugin"
		}
	}
}