}
                dependencies {
                    classpath "${first[0]}"
                    classpath "${second[0]}"
                }
            }

            Thread.currentThread().getContextClassLoader().getURLs()
                .eachWithIndex { artifact, idx -> println "classpath[\$idx]==\${Paths.get(artifact.toURI()).toFile().name}" }
        """

        when:

The whole transformation process normally happens on the first use of a build or when a plugin jar is added to the build script classpath.
We transform the jar and cache transformed jars for future use.

We transform plugins classpath, TestKit classpath and buildscript classes separately. 

    /**
     * Returns the classpath used to compile this source.
     *
     * @return The classpath. Never returns null.
     */
    FileCollection getCompileClasspath();

    /**
     * Sets the classpath used to compile this source.
     *
     * @param classpath The classpath. Should not be null.
     */
    void setCompileClasspath(FileCollection classpath);

    /**

The Eclipse classpath consists of classpath entries: source directories, jar files, project dependencies, etc.
Each classpath entry can have a list of classpath attributes, where the attributes are string key-value pairs.
There are two classpath attribute relevant for test sources: `test` and `without_test_code`, both of which can have `true` or `false` as values.

                id("maven-publish")
            }

            group = 'group'
            version = '1.0'

            tasks.compileJava {
                // Avoid resolving the classpath when caching the configuration
                classpath = files()
            }

            dependencies {
                api('org.test:non-transitive:1.0') { transitive = false }
                api 'org.test:artifact-only:1.0@jar'

                    List<String> classpath;
                    if (isJava9) {
                        classpath = Arrays.stream(System.getProperty("java.class.path").split(Pattern.quote(File.pathSeparator)))
                            .map(path -> new File(path).getName())
                            .collect(Collectors.toList());
                    } else {

    }
  }
}
        """

        // Classpath
        def classpath = getClasspath()
        classpath.assertHasLibs('foo-1.0.jar', 'bar-1.0.jar', 'baz-1.0.jar')
        classpath.lib('foo-1.0.jar').assertIsDeployedTo('/WEB-INF/lib')
        classpath.lib('bar-1.0.jar').assertIsDeployedTo('/WEB-INF/lib')
        classpath.lib('baz-1.0.jar').assertIsExcludedFromDeployment()

        // Facets

    @ToBeFixedForConfigurationCache(because = "test relies on static state")
    def "refreshes when buildscript classpath gets new dependency"() {
        addIsCachedCheck()
        createJarWithProperties("foo.jar")

        when:
        run()
        buildFile << """
            buildscript { dependencies { classpath files("foo.jar") } }
        """
        run()

        then:
        isNotCached()

import org.gradle.api.GradleException;
import org.gradle.api.UncheckedIOException;
import org.gradle.api.internal.classpath.DefaultModuleRegistry;
import org.gradle.api.internal.classpath.ModuleRegistry;
import org.gradle.api.logging.Logger;
import org.gradle.api.logging.Logging;
import org.gradle.internal.classpath.ClassPath;
import org.gradle.internal.concurrent.CompositeStoppable;
import org.gradle.internal.installation.CurrentGradleInstallation;

        server.start()
    }

    @Unroll("jars on buildscript classpath can change (loopNumber: #loopNumber)")
    def "jars on buildscript classpath can change"() {
        given:
        buildFile << '''
            buildscript {
                repositories { flatDir { dirs 'repo' }}
                dependencies { classpath name: 'test', version: '1.3-BUILD-SNAPSHOT' }
            }

            task hello {