diff options
Diffstat (limited to 'vendor/google.golang.org/appengine/internal/net_test.go')
-rw-r--r-- | vendor/google.golang.org/appengine/internal/net_test.go | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/vendor/google.golang.org/appengine/internal/net_test.go b/vendor/google.golang.org/appengine/internal/net_test.go new file mode 100644 index 000000000..24da8bb2b --- /dev/null +++ b/vendor/google.golang.org/appengine/internal/net_test.go @@ -0,0 +1,58 @@ +// Copyright 2014 Google Inc. All rights reserved. +// Use of this source code is governed by the Apache 2.0 +// license that can be found in the LICENSE file. + +// +build !appengine + +package internal + +import ( + "sync" + "testing" + "time" + + netcontext "golang.org/x/net/context" + + basepb "google.golang.org/appengine/internal/base" +) + +func TestDialLimit(t *testing.T) { + // Fill up semaphore with false acquisitions to permit only two TCP connections at a time. + // We don't replace limitSem because that results in a data race when net/http lazily closes connections. + nFake := cap(limitSem) - 2 + for i := 0; i < nFake; i++ { + limitSem <- 1 + } + defer func() { + for i := 0; i < nFake; i++ { + <-limitSem + } + }() + + f, c, cleanup := setup() // setup is in api_test.go + defer cleanup() + f.hang = make(chan int) + + // If we make two RunSlowly RPCs (which will wait for f.hang to be strobed), + // then the simple Non200 RPC should hang. + var wg sync.WaitGroup + wg.Add(2) + for i := 0; i < 2; i++ { + go func() { + defer wg.Done() + Call(toContext(c), "errors", "RunSlowly", &basepb.VoidProto{}, &basepb.VoidProto{}) + }() + } + time.Sleep(50 * time.Millisecond) // let those two RPCs start + + ctx, _ := netcontext.WithTimeout(toContext(c), 50*time.Millisecond) + err := Call(ctx, "errors", "Non200", &basepb.VoidProto{}, &basepb.VoidProto{}) + if err != errTimeout { + t.Errorf("Non200 RPC returned with err %v, want errTimeout", err) + } + + // Drain the two RunSlowly calls. + f.hang <- 1 + f.hang <- 1 + wg.Wait() +} |