}

        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, [], [])
    }