1 /* 2 * Copyright 2018, 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; 18 19 import static com.google.common.truth.Truth.assertThat; 20 21 import java.util.ArrayList; 22 import java.util.Collections; 23 import java.util.List; 24 import org.junit.Rule; 25 import org.junit.Test; 26 import org.junit.rules.ExpectedException; 27 import org.junit.runner.RunWith; 28 import org.junit.runners.JUnit4; 29 30 /** Unit tests for {@link DoubleGauge}. */ 31 @RunWith(JUnit4.class) 32 public class DoubleGaugeTest { 33 @Rule public ExpectedException thrown = ExpectedException.none(); 34 35 private static final String NAME = "name"; 36 private static final String DESCRIPTION = "description"; 37 private static final String UNIT = "1"; 38 private static final List<LabelKey> LABEL_KEY = 39 Collections.singletonList(LabelKey.create("key", "key description")); 40 private static final List<LabelValue> LABEL_VALUES = 41 Collections.singletonList(LabelValue.create("value")); 42 private static final List<LabelKey> EMPTY_LABEL_KEYS = new ArrayList<LabelKey>(); 43 private static final List<LabelValue> EMPTY_LABEL_VALUES = new ArrayList<LabelValue>(); 44 45 // TODO(mayurkale): Add more tests, once DoubleGauge plugs-in into the registry. 46 47 @Test 48 public void noopGetOrCreateTimeSeries_WithNullLabelValues() { 49 DoubleGauge doubleGauge = 50 DoubleGauge.newNoopDoubleGauge(NAME, DESCRIPTION, UNIT, EMPTY_LABEL_KEYS); 51 thrown.expect(NullPointerException.class); 52 thrown.expectMessage("labelValues"); 53 doubleGauge.getOrCreateTimeSeries(null); 54 } 55 56 @Test 57 public void noopGetOrCreateTimeSeries_WithNullElement() { 58 List<LabelValue> labelValues = Collections.singletonList(null); 59 DoubleGauge doubleGauge = DoubleGauge.newNoopDoubleGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY); 60 thrown.expect(NullPointerException.class); 61 thrown.expectMessage("labelValue element should not be null."); 62 doubleGauge.getOrCreateTimeSeries(labelValues); 63 } 64 65 @Test 66 public void noopGetOrCreateTimeSeries_WithInvalidLabelSize() { 67 DoubleGauge doubleGauge = DoubleGauge.newNoopDoubleGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY); 68 thrown.expect(IllegalArgumentException.class); 69 thrown.expectMessage("Incorrect number of labels."); 70 doubleGauge.getOrCreateTimeSeries(EMPTY_LABEL_VALUES); 71 } 72 73 @Test 74 public void noopRemoveTimeSeries_WithNullLabelValues() { 75 DoubleGauge doubleGauge = DoubleGauge.newNoopDoubleGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY); 76 thrown.expect(NullPointerException.class); 77 thrown.expectMessage("labelValues"); 78 doubleGauge.removeTimeSeries(null); 79 } 80 81 @Test 82 public void noopSameAs() { 83 DoubleGauge doubleGauge = DoubleGauge.newNoopDoubleGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY); 84 assertThat(doubleGauge.getDefaultTimeSeries()).isSameAs(doubleGauge.getDefaultTimeSeries()); 85 assertThat(doubleGauge.getDefaultTimeSeries()) 86 .isSameAs(doubleGauge.getOrCreateTimeSeries(LABEL_VALUES)); 87 } 88 } 89
