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89 changes: 89 additions & 0 deletions
89
.../src/test/java/io/micrometer/core/instrument/distribution/FixedBoundaryHistogramTest.java
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/* | ||
* Copyright 2024 VMware, Inc. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* https://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
package io.micrometer.core.instrument.distribution; | ||
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import static org.assertj.core.api.Assertions.assertThat; | ||
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import java.util.stream.Stream; | ||
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import org.junit.jupiter.api.BeforeEach; | ||
import org.junit.jupiter.api.Test; | ||
import org.junit.jupiter.params.ParameterizedTest; | ||
import org.junit.jupiter.params.provider.Arguments; | ||
import org.junit.jupiter.params.provider.MethodSource; | ||
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class FixedBoundaryHistogramTest { | ||
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private static final double[] BUCKET_BOUNDS = new double[] { 1, 10, 100 }; | ||
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private FixedBoundaryHistogram fixedBoundaryHistogram; | ||
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@BeforeEach | ||
void setup() { | ||
fixedBoundaryHistogram = new FixedBoundaryHistogram(BUCKET_BOUNDS, false); | ||
} | ||
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@Test | ||
void testGetBuckets() { | ||
assertThat(fixedBoundaryHistogram.getBuckets()).containsExactly(BUCKET_BOUNDS); | ||
} | ||
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@ParameterizedTest | ||
@MethodSource("valuedIndexProvider") | ||
void testLeastLessThanOrEqualTo(long value, int expectedIndex) { | ||
assertThat(fixedBoundaryHistogram.leastLessThanOrEqualTo(value)).isEqualTo(expectedIndex); | ||
} | ||
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private static Stream<Arguments> valuedIndexProvider() { | ||
return Stream.of(Arguments.of(0, 0), Arguments.of(1, 0), Arguments.of(2, 1), Arguments.of(5, 1), | ||
Arguments.of(10, 1), Arguments.of(11, 2), Arguments.of(90, 2), Arguments.of(100, 2), | ||
Arguments.of(101, -1), Arguments.of(Long.MAX_VALUE, -1)); | ||
} | ||
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@Test | ||
void testReset() { | ||
fixedBoundaryHistogram.record(1); | ||
fixedBoundaryHistogram.record(10); | ||
fixedBoundaryHistogram.record(100); | ||
assertThat(fixedBoundaryHistogram.getCountsAtBucket()).allMatch(countAtBucket -> countAtBucket.count() == 1); | ||
fixedBoundaryHistogram.reset(); | ||
assertThat(fixedBoundaryHistogram.getCountsAtBucket()).allMatch(countAtBucket -> countAtBucket.count() == 0); | ||
} | ||
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@Test | ||
void testCountsAtBucket() { | ||
fixedBoundaryHistogram.record(1); | ||
fixedBoundaryHistogram.record(10); | ||
fixedBoundaryHistogram.record(100); | ||
assertThat(fixedBoundaryHistogram.getCountsAtBucket()).allMatch(countAtBucket -> countAtBucket.count() == 1); | ||
fixedBoundaryHistogram.reset(); | ||
assertThat(fixedBoundaryHistogram.getCountsAtBucket()).allMatch(countAtBucket -> countAtBucket.count() == 0); | ||
fixedBoundaryHistogram.record(0); | ||
assertThat(fixedBoundaryHistogram.getCountsAtBucket()).containsExactly(new CountAtBucket(1.0, 1), | ||
new CountAtBucket(10.0, 0), new CountAtBucket(100.0, 0)); | ||
} | ||
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@Test | ||
void testCumulativeCounts() { | ||
fixedBoundaryHistogram = new FixedBoundaryHistogram(BUCKET_BOUNDS, true); | ||
fixedBoundaryHistogram.record(1); | ||
fixedBoundaryHistogram.record(10); | ||
fixedBoundaryHistogram.record(100); | ||
assertThat(fixedBoundaryHistogram.getCountsAtBucket()).containsExactly(new CountAtBucket(1.0, 1), | ||
new CountAtBucket(10.0, 2), new CountAtBucket(100.0, 3)); | ||
} | ||
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} |
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