Mercurial > hg > release > thermostat-0.15
view vm-cpu/agent/src/test/java/com/redhat/thermostat/vm/cpu/agent/internal/VmCpuStatBuilderTest.java @ 1248:84ea87a65eda
Use WriterID service over Storage.get/setAgentId() (Part 3).
Reviewed-by: vanaltj
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-September/008099.html
PR1509
author | Severin Gehwolf <sgehwolf@redhat.com> |
---|---|
date | Mon, 02 Sep 2013 11:32:11 +0200 |
parents | f7961cf1e440 |
children |
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/* * Copyright 2012, 2013 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.vm.cpu.agent.internal; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; import static org.mockito.Matchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.when; import org.junit.Before; import org.junit.Test; import com.redhat.thermostat.common.Clock; import com.redhat.thermostat.storage.core.WriterID; import com.redhat.thermostat.test.Bug; import com.redhat.thermostat.vm.cpu.common.model.VmCpuStat; public class VmCpuStatBuilderTest { private WriterID writerID; @Before public void setup() { writerID = mock(WriterID.class); } @Test public void testBuilderKnowsNothing() { Clock clock = mock(Clock.class); ProcessStatusInfoBuilder statusBuilder = mock(ProcessStatusInfoBuilder.class); int cpuCount = 0; long ticksPerSecond = 0; VmCpuStatBuilder builder = new VmCpuStatBuilder(clock, cpuCount, ticksPerSecond, statusBuilder, writerID); assertFalse(builder.knowsAbout(0)); assertFalse(builder.knowsAbout(1)); assertFalse(builder.knowsAbout(Integer.MIN_VALUE)); assertFalse(builder.knowsAbout(Integer.MAX_VALUE)); } @Test(expected = IllegalArgumentException.class) public void testBuilderThrowsOnBuildOfUnknownPid() { Clock clock = mock(Clock.class); int cpuCount = 0; long ticksPerSecond = 0; ProcessStatusInfoBuilder statusBuilder = mock(ProcessStatusInfoBuilder.class); VmCpuStatBuilder builder = new VmCpuStatBuilder(clock, cpuCount, ticksPerSecond, statusBuilder, writerID); builder.build("vmId", 0); } @Test public void testBuildNullOnInsufficentInformation() { int PID = 0; int cpuCount = 0; long ticksPerSecond = 0; final long CLOCK1 = 10000; final long CLOCK2 = 20000; final ProcessStatusInfo initialInfo = new ProcessStatusInfo(PID, 1, 2); final ProcessStatusInfo laterInfo = null; Clock clock = mock(Clock.class); when(clock.getMonotonicTimeNanos()).thenReturn((long) (CLOCK1 * 1E6)).thenReturn((long) (CLOCK2 * 1E6)); ProcessStatusInfoBuilder statusBuilder = mock(ProcessStatusInfoBuilder.class); when(statusBuilder.build(any(Integer.class))).thenReturn(initialInfo).thenReturn(laterInfo).thenReturn(null); VmCpuStatBuilder builder = new VmCpuStatBuilder(clock, cpuCount, ticksPerSecond, statusBuilder, writerID); builder.learnAbout(PID); assertEquals(null, builder.build("vmId", PID)); } @Test public void testSaneBuild() { final String VM_ID = "vmId"; final int PID = 0; final int CPU_COUNT = 3; final long USER_INITIAL_TICKS = 1; final long KERNEL_INITIAL_TICKS = 1; final long USER_LATER_TICKS = 10; final long KERNEL_LATER_TICKS = 10; final long CLOCK1 = 10000; final long CLOCK2 = 20000; final long TICKS_PER_SECOND = 100; final double CPU_LOAD_PERCENT = 100.0 * ((USER_LATER_TICKS + KERNEL_LATER_TICKS) - (USER_INITIAL_TICKS + KERNEL_INITIAL_TICKS)) / TICKS_PER_SECOND / ((CLOCK2 - CLOCK1) * 1E-3 /* millis to seconds */) / CPU_COUNT; final ProcessStatusInfo initialInfo = new ProcessStatusInfo(PID, USER_INITIAL_TICKS, KERNEL_INITIAL_TICKS); final ProcessStatusInfo laterInfo = new ProcessStatusInfo(PID, USER_LATER_TICKS, KERNEL_LATER_TICKS); Clock clock = mock(Clock.class); when(clock.getRealTimeMillis()).thenReturn(CLOCK2); when(clock.getMonotonicTimeNanos()).thenReturn((long) (CLOCK1 * 1E6)).thenReturn((long) (CLOCK2 * 1E6)); ProcessStatusInfoBuilder statusBuilder = mock(ProcessStatusInfoBuilder.class); when(statusBuilder.build(any(Integer.class))).thenReturn(initialInfo).thenReturn(laterInfo).thenReturn(null); VmCpuStatBuilder builder = new VmCpuStatBuilder(clock, CPU_COUNT, TICKS_PER_SECOND, statusBuilder, writerID); builder.learnAbout(PID); VmCpuStat stat = builder.build(VM_ID, PID); assertNotNull(stat); assertEquals(VM_ID, stat.getVmId()); assertEquals(CLOCK2, stat.getTimeStamp()); assertEquals(CPU_LOAD_PERCENT, stat.getCpuLoad(), 0.0001); } @Bug(id="1051", summary="Avoid exceptions when reading /proc/ for dead processes", url="http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1051") @Test public void testNoExceptionForBuilderLearningAboutDeadProcess() { Clock clock = mock(Clock.class); when(clock.getMonotonicTimeNanos()).thenReturn((long) (10000 * 1E6)); ProcessStatusInfoBuilder procBuilder = mock(ProcessStatusInfoBuilder.class); // This thing returns null if the /proc entry goes away. Rather than try to // 'guess' at a pid that will not be present during test, just mock this. when(procBuilder.build(any(Integer.class))).thenReturn(null); VmCpuStatBuilder builder = new VmCpuStatBuilder(clock, 3, 100, procBuilder, writerID); // If we can't handle a process' /proc entry disappearing, the next line // will throw exception. If it does not, then we are okay. try { builder.learnAbout(0); } catch (Exception e) { // Shouldn't happen. assertTrue(false); } } }