github.com/cryptogateway/go-paymex@v0.0.0-20210204174735-96277fb1e602/les/utils/exec_queue_test.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package utils
    18  
    19  import "testing"
    20  
    21  func TestExecQueue(t *testing.T) {
    22  	var (
    23  		N        = 10000
    24  		q        = NewExecQueue(N)
    25  		counter  int
    26  		execd    = make(chan int)
    27  		testexit = make(chan struct{})
    28  	)
    29  	defer q.Quit()
    30  	defer close(testexit)
    31  
    32  	check := func(state string, wantOK bool) {
    33  		c := counter
    34  		counter++
    35  		qf := func() {
    36  			select {
    37  			case execd <- c:
    38  			case <-testexit:
    39  			}
    40  		}
    41  		if q.CanQueue() != wantOK {
    42  			t.Fatalf("CanQueue() == %t for %s", !wantOK, state)
    43  		}
    44  		if q.Queue(qf) != wantOK {
    45  			t.Fatalf("Queue() == %t for %s", !wantOK, state)
    46  		}
    47  	}
    48  
    49  	for i := 0; i < N; i++ {
    50  		check("queue below cap", true)
    51  	}
    52  	check("full queue", false)
    53  	for i := 0; i < N; i++ {
    54  		if c := <-execd; c != i {
    55  			t.Fatal("execution out of order")
    56  		}
    57  	}
    58  	q.Quit()
    59  	check("closed queue", false)
    60  }