Testing gradle duplicate handling behavior

gistfile1.groovy

package org.gradle.api.internal.file.copy

import org.gradle.api.Project
import org.gradle.api.file.FileTree
import org.gradle.api.file.FileVisitDetails
import org.gradle.api.file.RelativePath
import org.gradle.testfixtures.ProjectBuilder
import spock.lang.Shared
import spock.lang.Specification

class DuplicateHandlingCopySpecVisitorTest extends Specification {
    @Shared Project project = new ProjectBuilder().build()

    FileCopySpecVisitor delegate = Mock()
    org.gradle.internal.nativeplatform.filesystem.FileSystem fileSystem = Mock()
    ReadableCopySpec copySpec = Mock()
    FileTree fileTree = Mock()
    def visitor = new MappingCopySpecVisitor(
            new DuplicateHandlingCopySpecVisitor(delegate), fileSystem)

    
    def duplicatesIncludedByDefaultInZipAndTar() {
        FileVisitDetails file1 = Mock()
        FileVisitDetails file2 = Mock()
        FileVisitDetails file3 = Mock()

        given:
        file1.relativePath >> new RelativePath(true, 'path/file1.txt')
        file2.relativePath >> new RelativePath(true, 'path/file2.txt')
        file3.relativePath >> new RelativePath(true, 'path/file1.txt')

        fileTree.files >> [ file1, file2, file3 ]

        copySpec.destPath >> new RelativePath(false, '/root')
        copySpec.allCopyActions >> []
        copySpec.source >> fileTree

        when:
        visitor.visitSpec(copySpec)
        fileTree.files.each { visitor.visitFile it }

        then:
        1 * delegate.visitSpec(copySpec)
        1 * delegate.visitFile({ it.relativePath.pathString ==  '/root/path/file1.txt' })
        1 * delegate.visitFile({ it.relativePath.pathString ==  '/root/path/file2.txt' })
        1 * delegate.visitFile({ it.relativePath.pathString ==  '/root/path/file1.txt' })

    }
    
}