1 /* 2 * Copyright 2019, OpenCensus Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.opencensus.metrics.data; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import io.opencensus.common.Timestamp; 22 import io.opencensus.metrics.data.AttachmentValue.AttachmentValueString; 23 import java.util.Collections; 24 import java.util.Map; 25 import org.junit.Rule; 26 import org.junit.Test; 27 import org.junit.rules.ExpectedException; 28 import org.junit.runner.RunWith; 29 import org.junit.runners.JUnit4; 30 31 /** Unit tests for {@link io.opencensus.metrics.data.Exemplar}. */ 32 @RunWith(JUnit4.class) 33 public class ExemplarTest { 34 35 private static final double TOLERANCE = 1e-6; 36 private static final Timestamp TIMESTAMP_1 = Timestamp.create(1, 0); 37 private static final AttachmentValue ATTACHMENT_VALUE = AttachmentValueString.create("value"); 38 private static final Map<String, AttachmentValue> ATTACHMENTS = 39 Collections.singletonMap("key", ATTACHMENT_VALUE); 40 41 @Rule public ExpectedException thrown = ExpectedException.none(); 42 43 @Test testExemplar()44 public void testExemplar() { 45 Exemplar exemplar = Exemplar.create(15.0, TIMESTAMP_1, ATTACHMENTS); 46 assertThat(exemplar.getValue()).isWithin(TOLERANCE).of(15.0); 47 assertThat(exemplar.getTimestamp()).isEqualTo(TIMESTAMP_1); 48 assertThat(exemplar.getAttachments()).isEqualTo(ATTACHMENTS); 49 } 50 51 @Test testExemplar_PreventNullTimestamp()52 public void testExemplar_PreventNullTimestamp() { 53 thrown.expect(NullPointerException.class); 54 Exemplar.create(15, null, ATTACHMENTS); 55 } 56 57 @Test testExemplar_PreventNullAttachments()58 public void testExemplar_PreventNullAttachments() { 59 thrown.expect(NullPointerException.class); 60 thrown.expectMessage("attachments"); 61 Exemplar.create(15, TIMESTAMP_1, null); 62 } 63 64 @Test testExemplar_PreventNullAttachmentKey()65 public void testExemplar_PreventNullAttachmentKey() { 66 Map<String, AttachmentValue> attachments = Collections.singletonMap(null, ATTACHMENT_VALUE); 67 thrown.expect(NullPointerException.class); 68 thrown.expectMessage("key of attachment"); 69 Exemplar.create(15, TIMESTAMP_1, attachments); 70 } 71 72 @Test testExemplar_PreventNullAttachmentValue()73 public void testExemplar_PreventNullAttachmentValue() { 74 Map<String, AttachmentValue> attachments = Collections.singletonMap("key", null); 75 thrown.expect(NullPointerException.class); 76 thrown.expectMessage("value of attachment"); 77 Exemplar.create(15, TIMESTAMP_1, attachments); 78 } 79 } 80