### Question:
ManagedFileImpl implements ManagedFile { public boolean hasChild() { String[] paths = getFile().list(); return paths != null && paths.length > 0; } protected  ManagedFileImpl(String basePath, String relativePath, String env); protected  ManagedFileImpl(ManagedFile parent, String basePath,
            String relativePath, String env); File asFile(); String getRelativePath(); String getName(); boolean delete(); boolean exists(); boolean isDirectory(); ManagedFile getParent(); boolean mkdir(); boolean mkdirs(); boolean createNewFile(); List<ManagedFile> listManagedFiles(); List<ManagedFile> listManagedFiles(FilenameFilter filter); ManagedFile createChild(String childName); List<File> listAllFiles(); boolean hasChild();  }### Answer:
@Test public void testHasChild() throws Exception { assertTrue(managedFile.hasChild()); }