/* * SonarQube * Copyright (C) 2009-2017 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); } }