### Question:
LESSSkinFileResourceReference implements LESSResourceReference { @Override public String serialize() { return String.format("LessSkinFile[%s]", fileName); } LESSSkinFileResourceReference(String fileName, TemplateManager templateManager, SkinManager skinManager); @Override boolean equals(Object o); @Override int hashCode(); @Override String getContent(String skin); @Override String serialize(); @Override String toString();  }### Answer:
@Test public void serialize() throws Exception { LESSSkinFileResourceReference lessSkinFileResourceReference = new LESSSkinFileResourceReference("file.less", templateManager, skinManager); assertEquals("LessSkinFile[file.less]", lessSkinFileResourceReference.serialize()); }