113 lines
1.8 KiB
Go
113 lines
1.8 KiB
Go
// Copyright 2022 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package histogram
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import (
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"math"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestGetBound(t *testing.T) {
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scenarios := []struct {
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idx int32
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schema int32
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want float64
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}{
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{
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idx: -1,
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schema: -1,
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want: 0.25,
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},
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{
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idx: 0,
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schema: -1,
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want: 1,
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},
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{
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idx: 1,
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schema: -1,
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want: 4,
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},
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{
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idx: 512,
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schema: -1,
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want: math.MaxFloat64,
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},
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{
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idx: 513,
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schema: -1,
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want: math.Inf(+1),
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},
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{
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idx: -1,
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schema: 0,
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want: 0.5,
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},
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{
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idx: 0,
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schema: 0,
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want: 1,
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},
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{
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idx: 1,
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schema: 0,
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want: 2,
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},
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{
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idx: 1024,
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schema: 0,
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want: math.MaxFloat64,
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},
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{
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idx: 1025,
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schema: 0,
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want: math.Inf(+1),
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},
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{
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idx: -1,
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schema: 2,
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want: 0.8408964152537144,
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},
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{
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idx: 0,
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schema: 2,
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want: 1,
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},
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{
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idx: 1,
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schema: 2,
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want: 1.189207115002721,
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},
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{
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idx: 4096,
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schema: 2,
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want: math.MaxFloat64,
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},
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{
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idx: 4097,
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schema: 2,
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want: math.Inf(+1),
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},
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}
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for _, s := range scenarios {
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got := getBound(s.idx, s.schema)
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if s.want != got {
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require.Equal(t, s.want, got, "idx %d, schema %d", s.idx, s.schema)
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}
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}
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}
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