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 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
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 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
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package org.apache.causeway.core.metamodel.facets.object.navparent;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.hamcrest.MatcherAssert.assertThat;

import org.apache.causeway.commons.internal.reflection._GenericResolver;
import org.apache.causeway.core.metamodel._testing.MetaModelContext_forTesting;
import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
import org.apache.causeway.core.metamodel.facets.Mocking;
import org.apache.causeway.core.metamodel.facets.object.navparent.method.NavigableParentFacetViaMethod;
import org.apache.causeway.core.metamodel.object.ManagedObject;

class NavigableParentFacetMethodTest {

    private Mocking mocking = new Mocking();
    private NavigableParentFacet facet;
    private FacetHolder simpleFacetHolder;
    private ManagedObject mockOwningAdapter;

    private DomainObjectWithProblemInNavigableParentMethod pojo;

    public static class DomainObjectWithProblemInNavigableParentMethod { //TODO public should not be a requirement
        public Object parent() {
            throw new NullPointerException();
        }
    }

    @BeforeEach
    void setUp() throws Exception {

        var mmc = MetaModelContext_forTesting.buildDefault();
        simpleFacetHolder = FacetHolder.forTesting(mmc);

        pojo = new DomainObjectWithProblemInNavigableParentMethod();

        var navigableParentMethod = _GenericResolver.testing
                .resolveMethod(DomainObjectWithProblemInNavigableParentMethod.class, "parent");
        facet = NavigableParentFacetViaMethod.create(pojo.getClass(), navigableParentMethod, simpleFacetHolder)
                .orElse(null);

        mockOwningAdapter = mocking.asViewmodel(pojo);
    }

    @AfterEach
    void tearDown() throws Exception {
        facet = null;
    }

    @Test
    void navigableParentThrowsException() {
        final Object parent = facet.navigableParent(mockOwningAdapter.getPojo());
        assertThat(parent, is(nullValue()));
    }

}
