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Ensure watcher tests don't block during shutdown 

These test failures from #93 inspired this change:
https://travis-ci.org/bitly/google_auth_proxy/jobs/62474406
https://travis-ci.org/bitly/google_auth_proxy/jobs/62474407

Both tests exhibited this pattern:
2015/05/13 22:10:54 validating: is xyzzy@example.com valid? false
2015/05/13 22:10:54 watching interrupted on event: "/tmp/test_auth_emails_300880185": CHMOD
2015/05/13 22:10:54 watching resumed for /tmp/test_auth_emails_300880185
2015/05/13 22:10:54 reloading after event: "/tmp/test_auth_emails_300880185": CHMOD
panic: test timed out after 1m0s

[snip]

goroutine 175 [chan send]:
github.com/bitly/google_auth_proxy.(*ValidatorTest).TearDown(0xc2080bc330)
        /home/travis/gopath/src/github.com/bitly/google_auth_proxy/validator_test.go:27 +0x43
github.com/bitly/google_auth_proxy.TestValidatorOverwriteEmailListViaRenameAndReplace(0xc2080f2480)
        /home/travis/gopath/src/github.com/bitly/google_auth_proxy/validator_watcher_test.go:103 +0x3b9

[snip]

goroutine 177 [chan send]:
github.com/bitly/google_auth_proxy.func·017()
        /home/travis/gopath/src/github.com/bitly/google_auth_proxy/validator_test.go:34 +0x41

I realized that the spurious CHMOD events were causing calls to
`func() { updated <- true }` (from validator_test.go:34), which caused
the goroutine running the watcher to block. At the same time,
ValidatorTest.TearDown was blocked by trying to send into the `done` channel.
The solution was to create a flag that ensured only one value was ever sent
into the update channel.
This commit is contained in:
Mike Bland 2015-05-13 18:30:22 -04:00
parent 6a0f119fc2
commit 5f2df7167a
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
validator_test.go
View File

@ -10,6 +10,7 @@ import (
type ValidatorTest struct { type ValidatorTest struct {
auth_email_file *os.File auth_email_file *os.File
done chan bool done chan bool
update_seen bool
} }
func NewValidatorTest(t *testing.T) *ValidatorTest { func NewValidatorTest(t *testing.T) *ValidatorTest {
@ -31,7 +32,12 @@ func (vt *ValidatorTest) TearDown() {
func (vt *ValidatorTest) NewValidator(domains []string, func (vt *ValidatorTest) NewValidator(domains []string,
updated chan<- bool) func(string) bool { updated chan<- bool) func(string) bool {
return newValidatorImpl(domains, vt.auth_email_file.Name(), return newValidatorImpl(domains, vt.auth_email_file.Name(),
vt.done, func() { updated <- true }) vt.done, func() {
if vt.update_seen == false {
updated <- true
vt.update_seen = true
}
})
} }
// This will close vt.auth_email_file. // This will close vt.auth_email_file.