github.com/go-kit/log@v0.2.1/concurrency_test.go (about)

     1  package log_test
     2  
     3  import (
     4  	"math"
     5  	"testing"
     6  
     7  	"github.com/go-kit/log"
     8  )
     9  
    10  // These test are designed to be run with the race detector.
    11  
    12  func testConcurrency(t *testing.T, logger log.Logger, total int) {
    13  	n := int(math.Sqrt(float64(total)))
    14  	share := total / n
    15  
    16  	errC := make(chan error, n)
    17  
    18  	for i := 0; i < n; i++ {
    19  		go func() {
    20  			errC <- spam(logger, share)
    21  		}()
    22  	}
    23  
    24  	for i := 0; i < n; i++ {
    25  		err := <-errC
    26  		if err != nil {
    27  			t.Fatalf("concurrent logging error: %v", err)
    28  		}
    29  	}
    30  }
    31  
    32  func spam(logger log.Logger, count int) error {
    33  	for i := 0; i < count; i++ {
    34  		err := logger.Log("key", i)
    35  		if err != nil {
    36  			return err
    37  		}
    38  	}
    39  	return nil
    40  }