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.metrics.data.AttachmentValue.AttachmentValueString; 22 import org.junit.Rule; 23 import org.junit.Test; 24 import org.junit.rules.ExpectedException; 25 import org.junit.runner.RunWith; 26 import org.junit.runners.JUnit4; 27 28 /** Unit tests for {@link io.opencensus.metrics.data.AttachmentValue}. */ 29 @RunWith(JUnit4.class) 30 public class AttachmentValueTest { 31 32 @Rule public final ExpectedException thrown = ExpectedException.none(); 33 34 @Test getValue()35 public void getValue() { 36 AttachmentValueString attachmentValue = AttachmentValueString.create("value"); 37 assertThat(attachmentValue.getValue()).isEqualTo("value"); 38 } 39 40 @Test preventNullString()41 public void preventNullString() { 42 thrown.expect(NullPointerException.class); 43 AttachmentValueString.create(null); 44 } 45 } 46