cayenne-server/src/test/java/org/apache/cayenne/util/DeepMergeOperationInheritanceIT.java

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package org.apache.cayenne.util;

import org.apache.cayenne.PersistenceState;
import org.apache.cayenne.access.DataContext;
import org.apache.cayenne.di.Inject;
import org.apache.cayenne.query.ObjectSelect;
import org.apache.cayenne.testdo.inheritance_people.Department;
import org.apache.cayenne.testdo.inheritance_people.Employee;
import org.apache.cayenne.testdo.inheritance_people.Manager;
import org.apache.cayenne.unit.di.DataChannelInterceptor;
import org.apache.cayenne.unit.di.server.PeopleProjectCase;
import org.junit.Test;

import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.*;

public class DeepMergeOperationInheritanceIT extends PeopleProjectCase {

    @Inject
    private DataContext context;

    @Inject
    private DataContext context1;

    @Inject
    protected DataChannelInterceptor queryInterceptor;

    @Test
    public void testDeepMergeExistingSubclass() {

        final Department d1 = context.newObject(Department.class);
        d1.setName("D1");

        // need to do double commit as Ashwood sorter blows on Employees/Departments ordering...
        context.commitChanges();

        Employee e1 = context.newObject(Employee.class);
        e1.setName("E1");
        e1.setPersonType("EE");
        d1.addToEmployees(e1);

        Manager e2 = context.newObject(Manager.class);
        e2.setName("E2");
        e2.setPersonType("EM");
        d1.addToEmployees(e2);

        context.commitChanges();

        // need to make sure source relationship is resolved as a result of some Ashwood strangeness...
        d1.getEmployees().size();

        // resolve Employees
        ObjectSelect.query(Employee.class).select(context1);

        final DeepMergeOperation op = new DeepMergeOperation(context1);

        assertMergeResult(d1, op);
    }

    @Test
    public void testDeepMergeNonExistentSubclass() {

        final Department d1 = context.newObject(Department.class);
        d1.setName("D1");

        // need to do double commit as Ashwood sorter blows on Employees/Departments ordering...
        context.commitChanges();

        Employee e1 = context.newObject(Employee.class);
        e1.setName("E1");
        e1.setPersonType("EE");
        d1.addToEmployees(e1);

        Manager e2 = context.newObject(Manager.class);
        e2.setName("E2");
        e2.setPersonType("EM");
        d1.addToEmployees(e2);

        context.commitChanges();

        // need to make sure source relationship is resolved as a result of some Ashwood strangeness...
        d1.getEmployees().size();
        final DeepMergeOperation op = new DeepMergeOperation(context1);

        assertMergeResult(d1, op);
    }

    private void assertMergeResult(Department d1, DeepMergeOperation op) {
        queryInterceptor.runWithQueriesBlocked(() -> {
            Department d2 = op.merge(d1);
            assertNotNull(d2);
            assertEquals(PersistenceState.COMMITTED, d2.getPersistenceState());

            for (Employee ex : d2.getEmployees()) {
                if ("E2".equals(ex.getName())) {
                    assertThat(ex, is(instanceOf(Manager.class)));
                } else {
                    assertThat(ex, is(not(instanceOf(Manager.class))));
                }
            }
        });
    }
}