mirror of
https://github.com/tailscale/tailscale.git
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8fd5d3eaf3
This fixes test failures like:
```
resource.go:34: goroutine count: expected 3, got 2
```
Signed-off-by: Maisem Ali <maisem@tailscale.com>
47 lines
980 B
Go
47 lines
980 B
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tstest
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import (
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"bytes"
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"runtime"
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"runtime/pprof"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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)
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func ResourceCheck(tb testing.TB) {
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tb.Helper()
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startN, startStacks := goroutines()
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tb.Cleanup(func() {
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if tb.Failed() {
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// Something else went wrong.
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return
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}
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// Goroutines might be still exiting.
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for i := 0; i < 100; i++ {
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if runtime.NumGoroutine() <= startN {
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return
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}
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time.Sleep(5 * time.Millisecond)
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}
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endN, endStacks := goroutines()
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if endN <= startN {
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return
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}
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tb.Logf("goroutine diff:\n%v\n", cmp.Diff(startStacks, endStacks))
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tb.Fatalf("goroutine count: expected %d, got %d\n", startN, endN)
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})
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}
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func goroutines() (int, []byte) {
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p := pprof.Lookup("goroutine")
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b := new(bytes.Buffer)
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p.WriteTo(b, 1)
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return p.Count(), b.Bytes()
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}
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