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moby--moby/engine/shutdown_test.go
Solomon Hykes 61eab75939 Extra testing for engine.Shutdown
Signed-off-by: Solomon Hykes <solomon@docker.com>
2014-08-06 17:56:12 +00:00

80 lines
2 KiB
Go

package engine
import (
"testing"
"time"
)
func TestShutdownEmpty(t *testing.T) {
eng := New()
if eng.IsShutdown() {
t.Fatalf("IsShutdown should be false")
}
eng.Shutdown()
if !eng.IsShutdown() {
t.Fatalf("IsShutdown should be true")
}
}
func TestShutdownAfterRun(t *testing.T) {
eng := New()
var called bool
eng.Register("foo", func(job *Job) Status {
called = true
return StatusOK
})
if err := eng.Job("foo").Run(); err != nil {
t.Fatal(err)
}
eng.Shutdown()
if err := eng.Job("foo").Run(); err == nil {
t.Fatalf("%#v", *eng)
}
}
// An approximate and racy, but better-than-nothing test that
//
func TestShutdownDuringRun(t *testing.T) {
var (
jobDelay time.Duration = 500 * time.Millisecond
jobDelayLow time.Duration = 100 * time.Millisecond
jobDelayHigh time.Duration = 700 * time.Millisecond
)
eng := New()
var completed bool
eng.Register("foo", func(job *Job) Status {
time.Sleep(jobDelay)
completed = true
return StatusOK
})
go eng.Job("foo").Run()
time.Sleep(50 * time.Millisecond)
done := make(chan struct{})
var startShutdown time.Time
go func() {
startShutdown = time.Now()
eng.Shutdown()
close(done)
}()
time.Sleep(50 * time.Millisecond)
if err := eng.Job("foo").Run(); err == nil {
t.Fatalf("run on shutdown should fail: %#v", *eng)
}
<-done
// Verify that Shutdown() blocks for roughly 500ms, instead
// of returning almost instantly.
//
// We use >100ms to leave ample margin for race conditions between
// goroutines. It's possible (but unlikely in reasonable testing
// conditions), that this test will cause a false positive or false
// negative. But it's probably better than not having any test
// for the 99.999% of time where testing conditions are reasonable.
if d := time.Since(startShutdown); d.Nanoseconds() < jobDelayLow.Nanoseconds() {
t.Fatalf("shutdown did not block long enough: %v", d)
} else if d.Nanoseconds() > jobDelayHigh.Nanoseconds() {
t.Fatalf("shutdown blocked too long: %v", d)
}
if !completed {
t.Fatalf("job did not complete")
}
}