### Question:
JWTData { public String getIssuer() { return issuer; } 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 getIssuer() throws Exception { assertEquals("issuer", new JWTData("issuer", null, null, null).getIssuer()); }