1 // Copyright (c) 2016 Uber Technologies, Inc. 2 // 3 // Permission is hereby granted, free of charge, to any person obtaining a copy 4 // of this software and associated documentation files (the "Software"), to deal 5 // in the Software without restriction, including without limitation the rights 6 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 // copies of the Software, and to permit persons to whom the Software is 8 // furnished to do so, subject to the following conditions: 9 // 10 // The above copyright notice and this permission notice shall be included in 11 // all copies or substantial portions of the Software. 12 // 13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 // THE SOFTWARE. 20 21 package ztest 22 23 import ( 24 "log" 25 "os" 26 "strconv" 27 "time" 28 ) 29 30 var _timeoutScale = 1.0 31 32 // Timeout scales the provided duration by $TEST_TIMEOUT_SCALE. 33 func Timeout(base time.Duration) time.Duration { 34 return time.Duration(float64(base) * _timeoutScale) 35 } 36 37 // Sleep scales the sleep duration by $TEST_TIMEOUT_SCALE. 38 func Sleep(base time.Duration) { 39 time.Sleep(Timeout(base)) 40 } 41 42 // Initialize checks the environment and alters the timeout scale accordingly. 43 // It returns a function to undo the scaling. 44 func Initialize(factor string) func() { 45 fv, err := strconv.ParseFloat(factor, 64) 46 if err != nil { 47 panic(err) 48 } 49 original := _timeoutScale 50 _timeoutScale = fv 51 return func() { _timeoutScale = original } 52 } 53 54 func init() { 55 if v := os.Getenv("TEST_TIMEOUT_SCALE"); v != "" { 56 Initialize(v) 57 log.Printf("Scaling timeouts by %vx.\n", _timeoutScale) 58 } 59 } 60