### Question:
JarResourceFile extends FileSystemFile { @Override public boolean isFile () { return true; } JarResourceFile(Resource resource, boolean isExecutable); @Override boolean isFile(); @Override long getLength(); @Override InputStream getInputStream(); @Override long getLastAccessTime(); @Override long getLastModifiedTime(); @Override int getPermissions();  }### Answer:
@Test public void isFile () { assertTrue(jarResourceFile.isFile()); }