github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/tools/playground/socket/socket_test.go (about) 1 // Copyright 2015 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package socket 6 7 import ( 8 "testing" 9 "time" 10 ) 11 12 func TestBuffer(t *testing.T) { 13 ch := make(chan *Message) 14 go func() { 15 ch <- &Message{Kind: "err", Body: "a"} 16 ch <- &Message{Kind: "err", Body: "b"} 17 ch <- &Message{Kind: "out", Body: "1"} 18 ch <- &Message{Kind: "out", Body: "2"} 19 time.Sleep(msgDelay * 2) 20 ch <- &Message{Kind: "out", Body: "3"} 21 ch <- &Message{Kind: "out", Body: "4"} 22 close(ch) 23 }() 24 25 var ms []*Message 26 for m := range buffer(ch) { 27 ms = append(ms, m) 28 } 29 if len(ms) != 3 { 30 t.Fatalf("got %v messages, want 2", len(ms)) 31 } 32 if g, w := ms[0].Body, "ab"; g != w { 33 t.Errorf("message 0 body = %q, want %q", g, w) 34 } 35 if g, w := ms[1].Body, "12"; g != w { 36 t.Errorf("message 1 body = %q, want %q", g, w) 37 } 38 if g, w := ms[2].Body, "34"; g != w { 39 t.Errorf("message 2 body = %q, want %q", g, w) 40 } 41 } 42 43 type killRecorder chan struct{} 44 45 func (k killRecorder) Kill() { close(k) } 46 47 func TestLimiter(t *testing.T) { 48 ch := make(chan *Message) 49 go func() { 50 var m Message 51 for i := 0; i < msgLimit+10; i++ { 52 ch <- &m 53 } 54 ch <- &Message{Kind: "end"} 55 }() 56 57 kr := make(killRecorder) 58 n := 0 59 for m := range limiter(ch, kr) { 60 n++ 61 if n > msgLimit && m.Kind != "end" { 62 t.Errorf("received non-end message after limit") 63 } 64 } 65 if n != msgLimit+1 { 66 t.Errorf("received %v messages, want %v", n, msgLimit+1) 67 } 68 select { 69 case <-kr: 70 case <-time.After(100 * time.Millisecond): 71 t.Errorf("process wasn't killed after reaching limit") 72 } 73 }