@Test
public void testValidateAWSInstanceId() {

    
    StringBuilder errMsg = new StringBuilder(256);
    MockInstanceAWSProvider provider = new MockInstanceAWSProvider();
    assertFalse(provider.validateAWSInstanceId("1234", "12345", errMsg));
    assertFalse(provider.validateAWSInstanceId("1234", null, errMsg));
    assertTrue(provider.validateAWSInstanceId("1234", "1234", errMsg));
}