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/*
* SonarQube
* Copyright (C) 2009-2021 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.db;
import java.util.Random;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import static org.assertj.core.api.Assertions.assertThat;
import static org.sonar.db.Pagination.forPage;
public class PaginationTest {
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Test
public void all_is_page_1_with_MAX_INTEGER_page_size() {
Pagination pagination = Pagination.all();
assertThat(pagination.getPage()).isEqualTo(1);
assertThat(pagination.getPageSize()).isEqualTo(Integer.MAX_VALUE);
}
@Test
public void all_returns_a_constant() {
assertThat(Pagination.all()).isSameAs(Pagination.all());
}
@Test
public void forPage_fails_with_IAE_if_page_is_0() {
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("page index must be >= 1");
forPage(0);
}
@Test
public void forPage_fails_with_IAE_if_page_is_less_than_0() {
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("page index must be >= 1");
forPage(-Math.abs(new Random().nextInt()) - 1);
}
@Test
public void andSize_fails_with_IAE_if_size_is_0() {
Pagination.Builder builder = forPage(1);
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("page size must be >= 1");
builder.andSize(0);
}
@Test
public void andSize_fails_with_IAE_if_size_is_less_than_0() {
Pagination.Builder builder = forPage(1);
expectedException.expect(IllegalArgumentException.class);
expectedException.expectMessage("page size must be >= 1");
builder.andSize(-Math.abs(new Random().nextInt()) - 1);
}
@Test
public void offset_is_computed_from_page_and_size() {
assertThat(forPage(2).andSize(3).getOffset()).isEqualTo(3);
assertThat(forPage(5).andSize(3).getOffset()).isEqualTo(12);
assertThat(forPage(5).andSize(1).getOffset()).isEqualTo(4);
}
@Test
public void startRowNumber_is_computed_from_page_and_size() {
assertThat(forPage(2).andSize(3).getStartRowNumber()).isEqualTo(4);
assertThat(forPage(5).andSize(3).getStartRowNumber()).isEqualTo(13);
assertThat(forPage(5).andSize(1).getStartRowNumber()).isEqualTo(5);
}
@Test
public void endRowNumber_is_computed_from_page_and_size() {
assertThat(forPage(2).andSize(3).getEndRowNumber()).isEqualTo(6);
assertThat(forPage(5).andSize(3).getEndRowNumber()).isEqualTo(15);
assertThat(forPage(5).andSize(1).getEndRowNumber()).isEqualTo(5);
}
}
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