def collection = new TestCompositeFileCollection(source1, source2)

        expect:
        collection.getFiles() as List == [file1, file2, file3]
    }

    def "contents track contents of source collections"() {
        def source1 = new TestFileCollection(file1)
        def source2 = new TestFileCollection(file2, file3)
        def collection = new TestCompositeFileCollection(source1, source2)

package org.gradle.internal.snapshot;

public abstract class RootTrackingFileSystemSnapshotHierarchyVisitor implements FileSystemSnapshotHierarchyVisitor {
    private int treeDepth;

    /**
     * Called before visiting the contents of a directory.
     */
    public void enterDirectory(DirectorySnapshot directorySnapshot, boolean isRoot) {}

    /**
     * Called for each regular file/directory/missing/unavailable file.
     *

        then:
        // Check tests have run
        def result = new DefaultTestExecutionResult(groovyProjectDir)
        result.assertTestClassesExecuted('org.gradle.PersonTest')

        and:
        // Check contents of jar
        TestFile tmpDir = file('jarContents')
        groovyProjectDir.file('build/libs/customized-layout.jar').unzipTo(tmpDir)
        tmpDir.assertHasDescendants(
            'META-INF/MANIFEST.MF',

import java.util.jar.Manifest
import java.util.zip.ZipEntry

class JarUtils {
    static def jarWithContents(Map<String, String> contents) {
        def out = new ByteArrayOutputStream()
        def jarOut = new JarOutputStream(out)
        try {
            contents.each { file, fileContents ->
                def zipEntry = new ZipEntry(file)
                zipEntry.setTime(0)

         */
        void visitFileTree(File root, PatternSet patterns, FileTreeInternal fileTree);

        /**
         * Visits a file tree whose content is generated from the contents of a file.
         */
        void visitFileTreeBackedByFile(File file, FileTreeInternal fileTree, FileSystemMirroringFileTree sourceTree);
    }

    val stateType: StateType
    val stateFile: ConfigurationCacheStateStore.StateFile
    fun outputStream(): OutputStream
    fun inputStream(): InputStream
    fun delete()

    // Replace the contents of this state file, by moving the given file to the location of this state file
    fun moveFrom(file: File)
    fun stateFileForIncludedBuild(build: BuildDefinition): ConfigurationCacheStateFile
}


internal

     * <p>
     * It can be set using the system property {@code org.gradle.testkit.dir} for the test process,
     * <p>
     * The actual contents of this directory are an internal implementation detail and may change at any time.
     *
     * @param testKitDir the TestKit directory
     * @return {@code this}
     * @since 2.7
     */

/**
 * Provides access to test resources for integration testing. Looks for the following directory in the test classpath:
 * <ul> <li>${testClass}/shared</li> <li>${testClass}/${testName}</li> </ul>
 *
 * Copies the contents of each such directory into a temporary directory for the test to use.
 */
public class TestResources implements MethodRule {
    private final Logger logger = LoggerFactory.getLogger(TestResources.class);

 *
 * <p>You can use {@link CacheBuilder#withInitializer(java.util.function.Consumer)} to provide an action to initialize the contents
 * of the cache, for building a read-only cache. An exclusive lock is held by this process while the initializer is running.</p>
 *

            LOG.info("Problems generating Javadoc."
                    + "\n  Command line issued: " + execAction.getCommandLine()
                    + "\n  Generated Javadoc options file has following contents:\n------\n{}------", GFileUtils.readFileQuietly(spec.getOptionsFile()));