github.com/cranelv/ethereum_mpc@v0.0.0-20191031014521-23aeb1415092/consensus_pbft/util/messagefan_test.go (about)

     1  /*
     2  Copyright IBM Corp. 2016 All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  		 http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package util
    18  
    19  import (
    20  	"testing"
    21  	"time"
    22  )
    23  
    24  func TestFanIn(t *testing.T) {
    25  	Channels := 500
    26  	Messages := 100
    27  
    28  	fh := NewMessageFan()
    29  
    30  	for i := 0; i < Channels; i++ {
    31  		c := make(chan *Message, Messages/2)
    32  		fh.AddFaninChannel(c)
    33  		go func() {
    34  			for j := 0; j < Messages; j++ {
    35  				c <- &Message{}
    36  			}
    37  		}()
    38  	}
    39  
    40  	r := fh.GetOutChannel()
    41  
    42  	count := 0
    43  	for {
    44  		select {
    45  		case <-r:
    46  		case <-time.After(time.Second):
    47  			t.Fatalf("Timed out waiting to read %d messages from channel, at message %d", Channels*Messages, count)
    48  		}
    49  		count++
    50  		if count == Channels*Messages {
    51  			break
    52  		}
    53  	}
    54  
    55  	select {
    56  	case <-r:
    57  		t.Fatalf("Read more than %d messages from channel", Channels*Messages)
    58  	default:
    59  	}
    60  
    61  }
    62  
    63  func TestFanChannelClose(t *testing.T) {
    64  	fh := NewMessageFan()
    65  	c := make(chan *Message)
    66  	fh.AddFaninChannel(c)
    67  	close(c)
    68  
    69  	for i := 0; i < 100; i++ {
    70  		if len(fh.ins) == 0 {
    71  			return
    72  		}
    73  		time.Sleep(time.Millisecond)
    74  	}
    75  
    76  	t.Fatalf("Channel was not cleaned up")
    77  }