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  }