go.uber.org/yarpc@v1.72.1/internal/digester/digester_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 digester
    22  
    23  import (
    24  	"sync"
    25  	"testing"
    26  
    27  	"github.com/stretchr/testify/assert"
    28  )
    29  
    30  func TestDigester(t *testing.T) {
    31  	const (
    32  		goroutines = 10
    33  		iterations = 100
    34  	)
    35  
    36  	expected := []byte{'f', 'o', 'o', 0, 'b', 'a', 'r'}
    37  
    38  	var wg sync.WaitGroup
    39  	for i := 0; i < goroutines; i++ {
    40  		wg.Add(1)
    41  		go func() {
    42  			defer wg.Done()
    43  			for i := 0; i < iterations; i++ {
    44  				d := New()
    45  				defer d.Free()
    46  
    47  				assert.Equal(t, 0, len(d.Digest()), "Expected fresh digester to have no internal state.")
    48  				assert.True(t, cap(d.Digest()) > 0, "Expected fresh digester to have available capacity.")
    49  
    50  				d.Add("foo")
    51  				d.Add("bar")
    52  				assert.Equal(
    53  					t,
    54  					string(expected),
    55  					string(d.Digest()),
    56  					"Expected digest to be null-separated concatenation of inputs.",
    57  				)
    58  			}
    59  		}()
    60  	}
    61  
    62  	wg.Wait()
    63  }