AbstractPageRequestUnitTests.java

/*
 * Copyright 2013-2017 the original author or authors.
 *
 * 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.springframework.data.domain;

import static org.assertj.core.api.Assertions.*;
import static org.springframework.data.domain.UnitTestUtils.*;

import org.junit.Test;

/**
 * @author Thomas Darimont
 */
public abstract class AbstractPageRequestUnitTests {

	public abstract AbstractPageRequest newPageRequest(int page, int size);

	@Test(expected = IllegalArgumentException.class)
	public void preventsNegativePage() {
		newPageRequest(-1, 10);
	}

	@Test(expected = IllegalArgumentException.class)
	public void preventsNegativeSize() {
		newPageRequest(0, -1);
	}

	@Test
	public void navigatesPageablesCorrectly() {

		Pageable request = newPageRequest(1, 10);

		assertThat(request.hasPrevious()).isTrue();
		assertThat(request.next()).isEqualTo((Pageable) newPageRequest(2, 10));

		Pageable first = request.previousOrFirst();

		assertThat(first.hasPrevious()).isFalse();
		assertThat(first).isEqualTo((Pageable) newPageRequest(0, 10));
		assertThat(first).isEqualTo(request.first());
		assertThat(first.previousOrFirst()).isEqualTo(first);
	}

	@Test
	public void equalsHonoursPageAndSize() {

		AbstractPageRequest request = newPageRequest(0, 10);

		// Equals itself
		assertEqualsAndHashcode(request, request);

		// Equals same setup
		assertEqualsAndHashcode(request, newPageRequest(0, 10));

		// Does not equal on different page
		assertNotEqualsAndHashcode(request, newPageRequest(1, 10));

		// Does not equal on different size
		assertNotEqualsAndHashcode(request, newPageRequest(0, 11));
	}

	@Test(expected = IllegalArgumentException.class) // DATACMNS-377
	public void preventsPageSizeLessThanOne() {
		newPageRequest(0, 0);
	}
}