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