### Question:
TokenInformation implements Serializable { public long getExpiresIn() { return expiresIn * 1000; }  long getExpiresIn(); boolean isValid();  }### Answer:
@Test public void testGetExpiresIn_shouldReturnMilliseconds() { TokenInformation tokenInformation = new TokenInformation(); tokenInformation.setExpiresIn(1); assertThat(tokenInformation.getExpiresIn()).isEqualTo(1000); }