### Question:
JWTData { public String getKeyId() { return keyId; } JWTData(String issuer, String subject, String audience, String keyId); String getIssuer(); String getSubject(); String getAudience(); String getKeyId(); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void getKeyId() throws Exception { assertEquals("keyId", new JWTData(null, null, null, "keyId").getKeyId()); }