assertSetContains(set, filenames as Set)
    }

    static def assertSetContainsForAllTypes(FileCollection set, String... filenames) {
        assertSetContains(set, filenames as Set, FileCollection.AntType.values() as List)
    }

    static def assertSetContainsForAllTypes(MinimalFileTree set, String... filenames) {
        assertSetContainsForAllTypes(new FileTreeAdapter(set), filenames)
    }

        }

        expect:
        assertSetContainsForAllTypes(fileTree, 'subDir/included1', 'subDir2/included2')
    }

    def testIsEmptyWhenBaseDirDoesNotExist() {
        fileTree.dir = new File(testDir, 'does not exist')

        expect:
        fileTree.files.empty
        fileTree.empty
        assertSetContainsForAllTypes(fileTree)
        assertVisits(fileTree, [], [])
    }

        set.srcDir 'dir1'
        FileTree filteredSet = set.matching { include '**/file1.txt' }

        then:
        assertSetContainsForAllTypes(filteredSet, 'subdir/file1.txt')

        when:
        set.srcDir 'dir2'

        then:
        assertSetContainsForAllTypes(filteredSet, 'subdir/file1.txt', 'subdir2/file1.txt')
    }

import static org.gradle.api.internal.file.TestFiles.fileHasher;
import static org.gradle.api.internal.file.TestFiles.fileSystem;
import static org.gradle.api.tasks.AntBuilderAwareUtil.assertSetContainsForAllTypes;
import static org.gradle.util.internal.WrapUtil.toList;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.fail;

import static org.gradle.api.file.FileVisitorUtil.assertCanStopVisiting;
import static org.gradle.api.file.FileVisitorUtil.assertVisits;
import static org.gradle.api.tasks.AntBuilderAwareUtil.assertSetContainsForAllTypes;
import static org.gradle.util.internal.WrapUtil.toList;
import static org.junit.Assert.assertEquals;

/**
 * Abstract base class for all tests of {@link AbstractArchiveFileTree} implementations which tests common