Giant blob of minor changes

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.0.0-20201028153306-37f0764111ff / internal / stack / stacktest / stacktest.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201028153306-37f0764111ff/internal/stack/stacktest/stacktest.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201028153306-37f0764111ff/internal/stack/stacktest/stacktest.go
new file mode 100644 (file)
index 0000000..e23f03e
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201028153306-37f0764111ff/internal/stack/stacktest/stacktest.go
@@ -0,0 +1,50 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package stacktest
+
+import (
+       "testing"
+       "time"
+
+       "golang.org/x/tools/internal/stack"
+)
+
+//this is only needed to support pre 1.14 when testing.TB did not have Cleanup
+type withCleanup interface {
+       Cleanup(func())
+}
+
+// the maximum amount of time to wait for goroutines to clean themselves up.
+const maxWait = time.Second
+
+// NoLeak checks that a test (or benchmark) does not leak any goroutines.
+func NoLeak(t testing.TB) {
+       c, ok := t.(withCleanup)
+       if !ok {
+               return
+       }
+       before := stack.Capture()
+       c.Cleanup(func() {
+               var delta stack.Delta
+               start := time.Now()
+               delay := time.Millisecond
+               for {
+                       after := stack.Capture()
+                       delta = stack.Diff(before, after)
+                       if len(delta.After) == 0 {
+                               // no leaks
+                               return
+                       }
+                       if time.Since(start) > maxWait {
+                               break
+                       }
+                       time.Sleep(delay)
+                       delay *= 2
+               }
+               // it's been long enough, and leaks are still present
+               summary := stack.Summarize(delta.After)
+               t.Errorf("goroutine leak detected:\n%+v", summary)
+       })
+}