### Question:
OAuth2HandlerError implements Serializable { public String getContextMessage() { return this.contextMessage; } OAuth2HandlerError(final OAuth2Error error, final String contextMessage,
          final Exception cause);  OAuth2HandlerError(final OAuth2Error error, final String contextMessage,
          final Exception cause, final String uri, final String description); OAuth2Error getError(); Exception getCause(); String getContextMessage(); String getUri(); String getDescription(); @Override String toString();  }### Answer:
@Test public void testGetContextMessage1() throws Exception { final OAuth2HandlerError fixture = new OAuth2HandlerError(OAuth2Error.AUTHENTICATION_PROBLEM, "", new Exception()); final String result = fixture.getContextMessage(); Assert.assertEquals("", result); }