How to use

getCauseMessage

method

in

com.ning.billing.jaxrs.json.BillingExceptionJson

@Test(groups = "fast")
public void testJson() throws Exception {
  final String className = UUID.randomUUID().toString();
  final int code = Integer.MIN_VALUE;
  final String message = UUID.randomUUID().toString();
  final String causeClassName = UUID.randomUUID().toString();
  final String causeMessage = UUID.randomUUID().toString();
  final BillingExceptionJson exceptionJson = new BillingExceptionJson(className, code, message, causeClassName, causeMessage, ImmutableList.<StackTraceElementJson>of());
  Assert.assertEquals(exceptionJson.getClassName(), className);
  Assert.assertEquals(exceptionJson.getCode(), (Integer) code);
  Assert.assertEquals(exceptionJson.getMessage(), message);
  Assert.assertEquals(exceptionJson.getCauseClassName(), causeClassName);
  Assert.assertEquals(exceptionJson.getCauseMessage(), causeMessage);
  Assert.assertEquals(exceptionJson.getStackTrace().size(), 0);
  final String asJson = mapper.writeValueAsString(exceptionJson);
  final BillingExceptionJson fromJson = mapper.readValue(asJson, BillingExceptionJson.class);
  Assert.assertEquals(fromJson, exceptionJson);
}

  @Test(groups = "fast")
  public void testFromException() throws Exception {
    final String nil = null;
    try {
      nil.toString();
      Assert.fail();
    } catch (NullPointerException e) {
      final BillingExceptionJson exceptionJson = new BillingExceptionJson(e);
      Assert.assertEquals(exceptionJson.getClassName(), e.getClass().getName());
      Assert.assertNull(exceptionJson.getCode());
      Assert.assertNull(exceptionJson.getMessage());
      Assert.assertNull(exceptionJson.getCauseClassName());
      Assert.assertNull(exceptionJson.getCauseMessage());
      Assert.assertFalse(exceptionJson.getStackTrace().isEmpty());
      Assert.assertEquals(exceptionJson.getStackTrace().get(0).getClassName(), TestBillingExceptionJson.class.getName());
      Assert.assertEquals(exceptionJson.getStackTrace().get(0).getMethodName(), "testFromException");
      Assert.assertFalse(exceptionJson.getStackTrace().get(0).getNativeMethod());
    }
  }
}