go.etcd.io/etcd@v3.3.27+incompatible/pkg/testutil/leak_test.go (about) 1 // Copyright 2016 The etcd Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package testutil 16 17 import ( 18 "fmt" 19 "os" 20 "testing" 21 ) 22 23 // so tests pass if given a -run that doesn't include TestSample 24 var ranSample = false 25 26 func TestMain(m *testing.M) { 27 m.Run() 28 isLeaked := CheckLeakedGoroutine() 29 if ranSample && !isLeaked { 30 fmt.Fprintln(os.Stderr, "expected leaky goroutines but none is detected") 31 os.Exit(1) 32 } 33 os.Exit(0) 34 } 35 36 func TestSample(t *testing.T) { 37 defer AfterTest(t) 38 ranSample = true 39 for range make([]struct{}, 100) { 40 go func() { 41 select {} 42 }() 43 } 44 }