/* * Copyright © 2016-2019 Michael Weirauch ([email protected]) * * 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 io.github.mweirauch.micrometer.jvm.extras.procfs; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNotSame; import static org.junit.Assert.assertSame; import static org.junit.Assert.assertThrows; import java.net.URISyntaxException; import java.nio.file.NoSuchFileException; import java.nio.file.Path; import java.nio.file.Paths; import java.util.ArrayList; import java.util.List; import java.util.function.Consumer; import org.junit.BeforeClass; import org.junit.Test; import com.google.common.testing.NullPointerTester; import com.google.common.testing.NullPointerTester.Visibility; public class ProcfsReaderTest { private static Path BASE; private final List<String> consumedLines = new ArrayList<>(); private final Consumer<String> consumer = (line) -> consumedLines.add(line); @BeforeClass public static void beforeClass() throws URISyntaxException { BASE = Paths.get(ProcfsReaderTest.class.getResource("/procfs/").toURI()); } @Test public void testNullContract() throws Exception { final ProcfsReader uut = new ProcfsReader(BASE, "smaps-001.txt"); final NullPointerTester npt = new NullPointerTester(); npt.testConstructors(uut.getClass(), Visibility.PACKAGE); npt.testStaticMethods(uut.getClass(), Visibility.PACKAGE); npt.testInstanceMethods(uut, Visibility.PACKAGE); } @Test public void testReadProcSelfNonExistant() throws Exception { final ProcfsReader uut = new ProcfsReader(BASE, "stub"); assertThrows(NoSuchFileException.class, () -> uut.read(consumer)); } @Test public void testNoOsSupport() throws Exception { System.setProperty("os.name", "SomeOS"); final ProcfsReader uut = new ProcfsReader(BASE, "stub", false); uut.read(consumer); assertEquals(0, consumedLines.size()); } @Test public void testRead() throws Exception { final ProcfsReader uut = new ProcfsReader(BASE, "smaps-001.txt"); uut.read(consumer); assertEquals(17, consumedLines.size()); assertEquals("Size: 4 kB", consumedLines.get(1)); assertEquals("Locked: 0 kB", consumedLines.get(16)); } @Test public void testGetInstance() throws Exception { final ProcfsReader instance1 = ProcfsReader.getInstance("foo"); final ProcfsReader instance2 = ProcfsReader.getInstance("foo"); assertSame(instance1, instance2); final ProcfsReader instance3 = ProcfsReader.getInstance("bar"); assertNotSame(instance3, instance1); assertNotSame(instance3, instance2); } }