import javax.validation.ConstraintViolation;
import javax.validation.Valid;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.constraints.NotNull;

import java.util.Collections;
import java.util.Iterator;
import java.util.Set;

import org.testng.annotations.Test;

import static org.fest.assertions.api.Assertions.assertThat;

public class ValidateIterableTest
{
    private static class TestNotNullValidation implements Iterable<Object>
    {
        @NotNull
        private Integer cannotBeNull = null;

        @Override
        public Iterator<Object> iterator()
        {
            return Collections.emptyIterator();
        }
    }

    private static class TestCascadingValidation
    {
        @Valid
        private TestNotNullValidation cannotHaveNull = new TestNotNullValidation();
    }

    @Test(enabled = false)
    public void testCascadingValidationWhenCascadedTypeImplementsIterable()
    {
        TestCascadingValidation validateThis = new TestCascadingValidation();
        Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
        Set<ConstraintViolation<TestCascadingValidation>> violations = validator.validate(validateThis);
        assertThat(violations).isNotEmpty();
    }
}