github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/server/servemux_test.go (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package server
    12  
    13  import (
    14  	"fmt"
    15  	"net/http"
    16  	"net/http/httptest"
    17  	"net/url"
    18  	"sync"
    19  	"testing"
    20  	"time"
    21  
    22  	"github.com/cockroachdb/cockroach/pkg/util/leaktest"
    23  	"github.com/cockroachdb/cockroach/pkg/util/timeutil"
    24  )
    25  
    26  func TestServeMuxConcurrency(t *testing.T) {
    27  	defer leaktest.AfterTest(t)()
    28  
    29  	const duration = 20 * time.Millisecond
    30  	start := timeutil.Now()
    31  
    32  	// TODO(peter): This test reliably fails using http.ServeMux with a
    33  	// "concurrent map read and write error" on go1.10. The bug in http.ServeMux
    34  	// is fixed in go1.11.
    35  	var mux safeServeMux
    36  	var wg sync.WaitGroup
    37  	wg.Add(2)
    38  
    39  	go func() {
    40  		defer wg.Done()
    41  		f := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {})
    42  		for i := 1; timeutil.Since(start) < duration; i++ {
    43  			mux.Handle(fmt.Sprintf("/%d", i), f)
    44  		}
    45  	}()
    46  
    47  	go func() {
    48  		defer wg.Done()
    49  		for i := 1; timeutil.Since(start) < duration; i++ {
    50  			r := &http.Request{
    51  				Method: "GET",
    52  				URL: &url.URL{
    53  					Path: "/",
    54  				},
    55  			}
    56  			w := httptest.NewRecorder()
    57  			mux.ServeHTTP(w, r)
    58  		}
    59  	}()
    60  
    61  	wg.Wait()
    62  }