.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools/gopls@v0.5.2/internal/regtest/stress_test.go

   1 // Copyright 2020 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package regtest
   6
   7 import (
   8         "context"
   9         "flag"
  10         "fmt"
  11         "testing"
  12         "time"
  13 )
  14
  15 // Pilosa is a repository that has historically caused significant memory
  16 // problems for Gopls. We use it for a simple stress test that types
  17 // arbitrarily in a file with lots of dependents.
  18
  19 var pilosaPath = flag.String("pilosa_path", "", "Path to a directory containing "+
  20         "github.com/pilosa/pilosa, for stress testing. Do not set this unless you "+
  21         "know what you're doing!")
  22
  23 func stressTestOptions(dir string) []RunOption {
  24         return []RunOption{
  25                 // Run in an existing directory, since we're trying to simulate known cases
  26                 // that cause gopls memory problems.
  27                 InExistingDir(dir),
  28
  29                 // Enable live debugging.
  30                 WithDebugAddress(":8087"),
  31
  32                 // Skip logs as they buffer up memory unnaturally.
  33                 SkipLogs(),
  34                 // Similarly to logs: disable hooks so that they don't affect performance.
  35                 SkipHooks(true),
  36                 // The Debug server only makes sense if running in singleton mode.
  37                 WithModes(Singleton),
  38                 // Set a generous timeout. Individual tests should control their own
  39                 // graceful termination.
  40                 WithTimeout(20 * time.Minute),
  41
  42                 // Use the actual proxy, since we want our builds to succeed.
  43                 WithGOPROXY("https://proxy.golang.org"),
  44         }
  45 }
  46
  47 func TestPilosaStress(t *testing.T) {
  48         if *pilosaPath == "" {
  49                 t.Skip("-pilosa_path not configured")
  50         }
  51         opts := stressTestOptions(*pilosaPath)
  52
  53         withOptions(opts...).run(t, "", func(t *testing.T, env *Env) {
  54                 files := []string{
  55                         "cmd.go",
  56                         "internal/private.pb.go",
  57                         "roaring/roaring.go",
  58                         "roaring/roaring_internal_test.go",
  59                         "server/handler_test.go",
  60                 }
  61                 for _, file := range files {
  62                         env.OpenFile(file)
  63                 }
  64                 ctx, cancel := context.WithTimeout(env.Ctx, 10*time.Minute)
  65                 defer cancel()
  66
  67                 i := 1
  68                 // MagicNumber is an identifier that occurs in roaring.go. Just change it
  69                 // arbitrarily.
  70                 env.RegexpReplace("roaring/roaring.go", "MagicNumber", fmt.Sprintf("MagicNumber%d", 1))
  71                 for {
  72                         select {
  73                         case <-ctx.Done():
  74                                 return
  75                         default:
  76                         }
  77                         env.RegexpReplace("roaring/roaring.go", fmt.Sprintf("MagicNumber%d", i), fmt.Sprintf("MagicNumber%d", i+1))
  78                         time.Sleep(20 * time.Millisecond)
  79                         i++
  80                 }
  81         })
  82 }