### Question:
Pop3Capabilities { @Override public String toString() { return String.format("CRAM-MD5 %b, PLAIN %b, STLS %b, TOP %b, UIDL %b, EXTERNAL %b", cramMD5, authPlain, stls, top, uidl, external); }  @Override String toString();  }### Answer:
@Test public void toString_producesReadableOutput() { String result = new Pop3Capabilities().toString(); assertEquals( "CRAM-MD5 false, PLAIN false, STLS false, TOP false, UIDL false, EXTERNAL false", result); }