65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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var (
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epsilon = 0.001
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)
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// Test all methods of LinearHistogramOptions using a sample bucketing scheme.
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func TestLinearHistogramOptions(t *testing.T) {
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o, err := NewLinearHistogramOptions(5.0, 0.3, epsilon)
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assert.Nil(t, err)
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assert.Equal(t, epsilon, o.Epsilon())
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assert.Equal(t, 18, o.NumBuckets())
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assert.Equal(t, 0.0, o.GetBucketStart(0))
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assert.Equal(t, 5.1, o.GetBucketStart(17))
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assert.Equal(t, 0, o.FindBucket(-1.0))
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assert.Equal(t, 0, o.FindBucket(0.0))
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assert.Equal(t, 4, o.FindBucket(1.3))
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assert.Equal(t, 17, o.FindBucket(100.0))
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}
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// Test all methods of ExponentialHistogramOptions using a sample bucketing scheme.
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func TestExponentialHistogramOptions(t *testing.T) {
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o, err := NewExponentialHistogramOptions(100.0, 10.0, 2.0, epsilon)
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assert.Nil(t, err)
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assert.Equal(t, epsilon, o.Epsilon())
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assert.Equal(t, 6, o.NumBuckets())
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assert.Equal(t, 0.0, o.GetBucketStart(0))
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assert.Equal(t, 10.0, o.GetBucketStart(1))
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assert.Equal(t, 20.0, o.GetBucketStart(2))
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assert.Equal(t, 40.0, o.GetBucketStart(3))
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assert.Equal(t, 80.0, o.GetBucketStart(4))
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assert.Equal(t, 160.0, o.GetBucketStart(5))
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assert.Equal(t, 0, o.FindBucket(-1.0))
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assert.Equal(t, 0, o.FindBucket(9.99))
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assert.Equal(t, 1, o.FindBucket(10.0))
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assert.Equal(t, 2, o.FindBucket(20.0))
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assert.Equal(t, 5, o.FindBucket(200.0))
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}
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