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main
tests/robustness/random/random.go
53 строки
1 KB
Marek Siarkowicz
Ensure compaction is executed at even intervals to avoid overload
24 окт 2024, 00:19
24 окт 2024, 00:19
16221d5
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// Copyright 2023 The etcd Authors // // 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 // // http://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 random import ( "math/rand" "strings" ) func RandString(size int) string { data := strings.Builder{} data.Grow(size) for i := 0; i < size; i++ { data.WriteByte(byte(int('a') + rand.Intn(26))) } return data.String() } func RandRange(start, end int64) int64 { return rand.Int63n(end-start) + start } type ChoiceWeight[T any] struct { Choice T Weight int } func PickRandom[T any](choices []ChoiceWeight[T]) T { sum := 0 for _, op := range choices { sum += op.Weight } roll := rand.Int() % sum for _, op := range choices { if roll < op.Weight { return op.Choice } roll -= op.Weight } panic("unexpected") }