### Question:
JWTData { @Override public String toString() { return "JWTData{" + "issuer='" + issuer + '\'' + ", subject='" + subject + '\'' + ", audience='" + audience + '\'' + ", keyId='" + 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 toStringContainsClassName() throws Exception { assertThat(new JWTData(null, null, null, null).toString(), containsString("JWTData")); }