go.uber.org/yarpc@v1.72.1/internal/iopool/copy_test.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package iopool
    22  
    23  import (
    24  	"bytes"
    25  	"math/rand"
    26  	"sync"
    27  	"testing"
    28  
    29  	"github.com/stretchr/testify/assert"
    30  )
    31  
    32  func TestBuffers(t *testing.T) {
    33  	var wg sync.WaitGroup
    34  	for g := 0; g < 10; g++ {
    35  		wg.Add(1)
    36  		go func() {
    37  			for i := 0; i < 100; i++ {
    38  				inputBytes := make([]byte, rand.Intn(5000)+20)
    39  				_, err := rand.Read(inputBytes)
    40  				assert.NoError(t, err, "Unexpected error from rand.Read")
    41  				reader := bytes.NewReader(inputBytes)
    42  
    43  				outputBytes := make([]byte, 0, len(inputBytes))
    44  				writer := bytes.NewBuffer(outputBytes)
    45  
    46  				Copy(writer, reader)
    47  			}
    48  			wg.Done()
    49  		}()
    50  	}
    51  	wg.Wait()
    52  }