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## Leaktest [](https://travis-ci.org/fortytw2/leaktest) [](https://codecov.io/gh/fortytw2/leaktest) [](https://sourcegraph.com/github.com/fortytw2/leaktest?badge) [](http://godoc.org/github.com/fortytw2/leaktest)
Refactored, tested variant of the goroutine leak detector found in both
`net/http` tests and the `cockroachdb` source tree.
Takes a snapshot of running goroutines at the start of a test, and at the end -
compares the two and _voila_. Ignores runtime/sys goroutines. Doesn't play nice
with `t.Parallel()` right now, but there are plans to do so.
### Installation
Go 1.7+
```
go get -u github.com/fortytw2/leaktest
```
Go 1.5/1.6 need to use the tag `v1.0.0`, as newer versions depend on
`context.Context`.
### Example
These tests fail, because they leak a goroutine
```go
// Default "Check" will poll for 5 seconds to check that all
// goroutines are cleaned up
func TestPool(t *testing.T) {
defer leaktest.Check(t)()
go func() {
for {
time.Sleep(time.Second)
}
}()
}
// Helper function to timeout after X duration
func TestPoolTimeout(t *testing.T) {
defer leaktest.CheckTimeout(t, time.Second)()
go func() {
for {
time.Sleep(time.Second)
}
}()
}
// Use Go 1.7+ context.Context for cancellation
func TestPoolContext(t *testing.T) {
ctx, _ := context.WithTimeout(context.Background(), time.Second)
defer leaktest.CheckContext(ctx, t)()
go func() {
for {
time.Sleep(time.Second)
}
}()
}
```
## LICENSE
Same BSD-style as Go, see LICENSE
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