Debug-only runtime tracking of funcs running on correct goroutines.
diff --git a/gotrack_test.go b/gotrack_test.go
new file mode 100644
index 0000000..3ff4957
--- /dev/null
+++ b/gotrack_test.go
@@ -0,0 +1,33 @@
+// Copyright 2014 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.
+// See https://code.google.com/p/go/source/browse/CONTRIBUTORS
+// Licensed under the same terms as Go itself:
+// https://code.google.com/p/go/source/browse/LICENSE
+
+package http2
+
+import (
+ "fmt"
+ "strings"
+ "testing"
+)
+
+func TestGoroutineLock(t *testing.T) {
+ DebugGoroutines = true
+ g := newGoroutineLock()
+ g.check()
+
+ sawPanic := make(chan interface{})
+ go func() {
+ defer func() { sawPanic <- recover() }()
+ g.check() // should panic
+ }()
+ e := <-sawPanic
+ if e == nil {
+ t.Fatal("did not see panic from check in other goroutine")
+ }
+ if !strings.Contains(fmt.Sprint(e), "wrong goroutine") {
+ t.Errorf("expected on see panic about running on the wrong goroutine; got %v", e)
+ }
+}
