/* * Copyright © 2017-2019 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; import static org.junit.Assert.assertEquals; import static org.mockito.ArgumentMatchers.any; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.times; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.verifyNoMoreInteractions; import static org.mockito.Mockito.when; import org.junit.Test; import com.google.common.testing.NullPointerTester; import com.google.common.testing.NullPointerTester.Visibility; import io.github.mweirauch.micrometer.jvm.extras.procfs.ProcfsStatus; import io.github.mweirauch.micrometer.jvm.extras.procfs.ProcfsStatus.KEY; import io.micrometer.core.instrument.Gauge; import io.micrometer.core.instrument.simple.SimpleMeterRegistry; public class ProcessMemoryMetricsTest { private final ProcfsStatus status = mock(ProcfsStatus.class); @Test public void testNullContract() { final ProcessMemoryMetrics uut = new ProcessMemoryMetrics(status); final NullPointerTester npt = new NullPointerTester(); npt.testConstructors(uut.getClass(), Visibility.PACKAGE); npt.testStaticMethods(uut.getClass(), Visibility.PACKAGE); npt.testInstanceMethods(uut, Visibility.PACKAGE); } @SuppressWarnings("unused") @Test public void testInstantiation() { new ProcessMemoryMetrics(); } @Test public void testGetMetrics() throws Exception { when(status.get(KEY.VSS)).thenReturn(1D); when(status.get(KEY.RSS)).thenReturn(2D); when(status.get(KEY.SWAP)).thenReturn(3D); final SimpleMeterRegistry registry = new SimpleMeterRegistry(); final ProcessMemoryMetrics uut = new ProcessMemoryMetrics(status); uut.bindTo(registry); final String expectedUnit = "bytes"; final Gauge vss = registry.get("process.memory.vss").gauge(); assertEquals(1.0, vss.value(), 0.0); assertEquals(expectedUnit, vss.getId().getBaseUnit()); final Gauge rss = registry.get("process.memory.rss").gauge(); assertEquals(2.0, rss.value(), 0.0); assertEquals(expectedUnit, rss.getId().getBaseUnit()); final Gauge swap = registry.get("process.memory.swap").gauge(); assertEquals(3.0, swap.value(), 0.0); assertEquals(expectedUnit, swap.getId().getBaseUnit()); verify(status, times(3)).get(any(KEY.class)); verifyNoMoreInteractions(status); } }