@Test
 public void testFirstFixture() {
   ResultValidator validator =
       fixture
           .registerAnnotatedCommandHandler(
               new MyCommandHandler(fixture.getRepository(), fixture.getEventBus()))
           .given(new MyEvent("aggregateId", 1))
           .when(new TestCommand("aggregateId"));
   validator.expectReturnValue(null);
   validator.expectEvents(new MyEvent("aggregateId", 2));
 }
 @Test
 public void testExpectEventsIgnoresFilteredField() {
   ResultValidator validator =
       fixture
           .registerAnnotatedCommandHandler(
               new MyCommandHandler(fixture.getRepository(), fixture.getEventBus()))
           .registerFieldFilter(field -> !field.getName().equals("someBytes"))
           .given(new MyEvent("aggregateId", 1))
           .when(new TestCommand("aggregateId"));
   validator.expectReturnValue(null);
   validator.expectEvents(new MyEvent("aggregateId", 2, "ignored".getBytes()));
 }