1 /* 2 * Copyright 2017, 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.stats; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import io.opencensus.stats.Measure.MeasureDouble; 22 import io.opencensus.tags.Tag; 23 import io.opencensus.tags.TagContext; 24 import io.opencensus.tags.TagKey; 25 import io.opencensus.tags.TagValue; 26 import java.util.Collections; 27 import java.util.Iterator; 28 import org.junit.Rule; 29 import org.junit.Test; 30 import org.junit.rules.ExpectedException; 31 import org.junit.runner.RunWith; 32 import org.junit.runners.JUnit4; 33 34 /** 35 * Unit tests for {@link NoopStats}. Tests for {@link NoopStats#newNoopViewManager} are in {@link 36 * NoopViewManagerTest} 37 */ 38 @RunWith(JUnit4.class) 39 public final class NoopStatsTest { 40 private static final Tag TAG = Tag.create(TagKey.create("key"), TagValue.create("value")); 41 private static final MeasureDouble MEASURE = 42 Measure.MeasureDouble.create("my measure", "description", "s"); 43 44 private final TagContext tagContext = 45 new TagContext() { 46 47 @Override 48 protected Iterator<Tag> getIterator() { 49 return Collections.<Tag>singleton(TAG).iterator(); 50 } 51 }; 52 53 @Rule public final ExpectedException thrown = ExpectedException.none(); 54 55 @Test noopStatsComponent()56 public void noopStatsComponent() { 57 assertThat(NoopStats.newNoopStatsComponent().getStatsRecorder()) 58 .isSameAs(NoopStats.getNoopStatsRecorder()); 59 assertThat(NoopStats.newNoopStatsComponent().getViewManager()) 60 .isInstanceOf(NoopStats.newNoopViewManager().getClass()); 61 } 62 63 @Test noopStatsComponent_GetState()64 public void noopStatsComponent_GetState() { 65 assertThat(NoopStats.newNoopStatsComponent().getState()) 66 .isEqualTo(StatsCollectionState.DISABLED); 67 } 68 69 @Test 70 @SuppressWarnings("deprecation") noopStatsComponent_SetState_IgnoresInput()71 public void noopStatsComponent_SetState_IgnoresInput() { 72 StatsComponent noopStatsComponent = NoopStats.newNoopStatsComponent(); 73 noopStatsComponent.setState(StatsCollectionState.ENABLED); 74 assertThat(noopStatsComponent.getState()).isEqualTo(StatsCollectionState.DISABLED); 75 } 76 77 @Test 78 @SuppressWarnings("deprecation") noopStatsComponent_SetState_DisallowsNull()79 public void noopStatsComponent_SetState_DisallowsNull() { 80 StatsComponent noopStatsComponent = NoopStats.newNoopStatsComponent(); 81 thrown.expect(NullPointerException.class); 82 noopStatsComponent.setState(null); 83 } 84 85 @Test 86 @SuppressWarnings("deprecation") noopStatsComponent_DisallowsSetStateAfterGetState()87 public void noopStatsComponent_DisallowsSetStateAfterGetState() { 88 StatsComponent noopStatsComponent = NoopStats.newNoopStatsComponent(); 89 noopStatsComponent.setState(StatsCollectionState.DISABLED); 90 noopStatsComponent.getState(); 91 thrown.expect(IllegalStateException.class); 92 thrown.expectMessage("State was already read, cannot set state."); 93 noopStatsComponent.setState(StatsCollectionState.ENABLED); 94 } 95 96 @Test noopStatsRecorder_PutAttachmentNullKey()97 public void noopStatsRecorder_PutAttachmentNullKey() { 98 MeasureMap measureMap = NoopStats.getNoopStatsRecorder().newMeasureMap(); 99 thrown.expect(NullPointerException.class); 100 thrown.expectMessage("key"); 101 measureMap.putAttachment(null, "value"); 102 } 103 104 @Test noopStatsRecorder_PutAttachmentNullValue()105 public void noopStatsRecorder_PutAttachmentNullValue() { 106 MeasureMap measureMap = NoopStats.getNoopStatsRecorder().newMeasureMap(); 107 thrown.expect(NullPointerException.class); 108 thrown.expectMessage("value"); 109 measureMap.putAttachment("key", null); 110 } 111 112 // The NoopStatsRecorder should do nothing, so this test just checks that record doesn't throw an 113 // exception. 114 @Test noopStatsRecorder_Record()115 public void noopStatsRecorder_Record() { 116 NoopStats.getNoopStatsRecorder().newMeasureMap().put(MEASURE, 5).record(tagContext); 117 } 118 119 // The NoopStatsRecorder should do nothing, so this test just checks that record doesn't throw an 120 // exception. 121 @Test noopStatsRecorder_RecordWithCurrentContext()122 public void noopStatsRecorder_RecordWithCurrentContext() { 123 NoopStats.getNoopStatsRecorder().newMeasureMap().put(MEASURE, 6).record(); 124 } 125 126 @Test noopStatsRecorder_Record_DisallowNullTagContext()127 public void noopStatsRecorder_Record_DisallowNullTagContext() { 128 MeasureMap measureMap = NoopStats.getNoopStatsRecorder().newMeasureMap(); 129 thrown.expect(NullPointerException.class); 130 thrown.expectMessage("tags"); 131 measureMap.record(null); 132 } 133 } 134