TestResultBearing.java

/*
 * Licensed 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, software
 * distributed under the License is distributed on an "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 under the License.
 */
package org.jdbi.v3.core.result;

import static org.assertj.core.api.Assertions.assertThat;

import org.jdbi.v3.core.Handle;
import org.jdbi.v3.core.rule.H2DatabaseRule;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

public class TestResultBearing
{
    @Rule
    public H2DatabaseRule dbRule = new H2DatabaseRule();

    @Before
    public void setUp() throws Exception
    {
        Handle h = dbRule.getSharedHandle();
        h.execute("CREATE TABLE reduce (u INT)");
        for (int u = 0; u < 5; u++)
        {
            h.execute("INSERT INTO reduce VALUES (?)", u);
        }
    }

    @Test
    public void testReduceBiFunction() throws Exception
    {
        assertThat(
            dbRule.getSharedHandle().createQuery("SELECT * FROM reduce")
                .mapTo(Integer.class)
                .reduce(0, TestResultBearing::add))
            .isEqualTo(10);
    }

    public static Integer add(Integer u, Integer v)
    {
        return u + v;
    }
}