mirror of https://github.com/tikv/pd.git
76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
// Copyright 2022 TiKV Project Authors.
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//
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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 movingaverage
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import (
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestWeightAllocator(t *testing.T) {
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re := require.New(t)
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checkSumFunc := func(wa *WeightAllocator, length int) {
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sum := 0.
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for i := range length {
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sum += wa.Get(i)
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}
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re.Less(1-sum, 1e-8)
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re.Greater(1-sum, -1e-8)
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}
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checkTimeFunc := func(x1, x2, times float64) {
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re.Less(x1/x2-times, 1e-8)
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re.Greater(x1/x2-times, -1e-8)
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}
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wa := NewWeightAllocator(1, 1)
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re.Equal(1., wa.Get(0))
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checkSumFunc(wa, 1)
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wa = NewWeightAllocator(10, 10)
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checkSumFunc(wa, 10)
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for i := range 10 {
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re.Equal(1./55.*float64(10-i), wa.Get(i))
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}
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checkTimeFunc(wa.Get(0), wa.Get(9), 10)
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checkTimeFunc(wa.Get(0), wa.Get(5), 2)
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wa = NewWeightAllocator(10, 1)
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checkSumFunc(wa, 10)
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re.Equal(1./10., wa.Get(0))
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re.Equal(1./10., wa.Get(7))
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wa = NewWeightAllocator(10, 3)
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checkSumFunc(wa, 10)
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checkTimeFunc(wa.Get(0), wa.Get(3), 1)
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checkTimeFunc(wa.Get(3), wa.Get(9), 3)
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checkTimeFunc(wa.Get(6), wa.Get(9), 2)
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re.Equal(0., wa.Get(10))
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wa = NewWeightAllocator(100, 0)
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re.Equal(0., wa.Get(88))
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wa = NewWeightAllocator(0, 0)
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re.Equal(0., wa.Get(0))
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wa = NewWeightAllocator(0, 100)
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re.Equal(0., wa.Get(10))
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re.Equal(0., wa.Get(-2))
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wa = NewWeightAllocator(0, 2)
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re.Equal(0., wa.Get(0))
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re.Equal(0., wa.Get(1))
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re.Equal(0., wa.Get(2))
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}
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