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 com.google.common.testing.EqualsTester; 22 import java.util.ArrayList; 23 import java.util.Arrays; 24 import java.util.List; 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.stats.BucketBoundaries}. */ 32 @RunWith(JUnit4.class) 33 public class BucketBoundariesTest { 34 35 @Rule public final ExpectedException thrown = ExpectedException.none(); 36 37 @Test testConstructBoundaries()38 public void testConstructBoundaries() { 39 List<Double> buckets = Arrays.asList(0.0, 1.0, 2.0); 40 BucketBoundaries bucketBoundaries = BucketBoundaries.create(buckets); 41 assertThat(bucketBoundaries.getBoundaries()).isEqualTo(buckets); 42 } 43 44 @Test testBoundariesDoesNotChangeWithOriginalList()45 public void testBoundariesDoesNotChangeWithOriginalList() { 46 List<Double> original = new ArrayList<Double>(); 47 original.add(0.0); 48 original.add(1.0); 49 original.add(2.0); 50 BucketBoundaries bucketBoundaries = BucketBoundaries.create(original); 51 original.set(2, 3.0); 52 original.add(4.0); 53 List<Double> expected = Arrays.asList(0.0, 1.0, 2.0); 54 assertThat(bucketBoundaries.getBoundaries()).isNotEqualTo(original); 55 assertThat(bucketBoundaries.getBoundaries()).isEqualTo(expected); 56 } 57 58 @Test testNullBoundaries()59 public void testNullBoundaries() throws Exception { 60 thrown.expect(NullPointerException.class); 61 BucketBoundaries.create(null); 62 } 63 64 @Test testUnsortedBoundaries()65 public void testUnsortedBoundaries() throws Exception { 66 List<Double> buckets = Arrays.asList(0.0, 1.0, 1.0); 67 thrown.expect(IllegalArgumentException.class); 68 BucketBoundaries.create(buckets); 69 } 70 71 @Test testNoBoundaries()72 public void testNoBoundaries() { 73 List<Double> buckets = Arrays.asList(); 74 BucketBoundaries bucketBoundaries = BucketBoundaries.create(buckets); 75 assertThat(bucketBoundaries.getBoundaries()).isEqualTo(buckets); 76 } 77 78 @Test testBucketBoundariesEquals()79 public void testBucketBoundariesEquals() { 80 new EqualsTester() 81 .addEqualityGroup( 82 BucketBoundaries.create(Arrays.asList(-1.0, 2.0)), 83 BucketBoundaries.create(Arrays.asList(-1.0, 2.0))) 84 .addEqualityGroup(BucketBoundaries.create(Arrays.asList(-1.0))) 85 .testEquals(); 86 } 87 } 88