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package detector
import (
"sync"
"testing"
"time"
"github.com/gogo/protobuf/proto"
mesos "github.com/mesos/mesos-go/api/v0/mesosproto"
"github.com/mesos/mesos-go/api/v0/upid"
"github.com/stretchr/testify/assert"
"golang.org/x/net/context"
)
const (
localhost = uint32(2130706433) // packed uint32 for 127.0.0.1 IPv4
)
func TestStandalone_nil(t *testing.T) {
d := NewStandalone(nil)
select {
case <-d.Done(): // expected
t.Fatalf("expected detector to stay alive since we haven't done anything with it")
case <-time.After(500 * time.Millisecond):
}
d.Detect(nil)
select {
case <-d.Done(): // expected
case <-time.After(1 * time.Second):
t.Fatalf("expected detector to shutdown since it has no master")
}
}
func TestStandalone_pollerIncompleteInfo(t *testing.T) {
d := NewStandalone(&mesos.MasterInfo{})
f := fetcherFunc(func(context.Context, string) (*upid.UPID, error) {
return nil, nil
})
ch := make(chan struct{})
go func() {
defer close(ch)
d.poller(f)
}()
select {
case <-ch: // expected
case <-time.After(1 * time.Second):
t.Fatalf("expected poller to shutdown since master info is incomplete")
}
select {
case <-d.Done(): // expected
case <-time.After(1 * time.Second):
t.Fatalf("expected detector to shutdown since it has no master")
}
}
func TestStandalone_pollerFetched(t *testing.T) {
assert := assert.New(t)
// presence of IP address allows fecher to be called
d := NewStandalone(&mesos.MasterInfo{Ip: proto.Uint32(localhost)})
defer d.Cancel()
fetched := make(chan struct{})
pid := &upid.UPID{
ID: "foo@127.0.0.1:5050",
Host: "127.0.0.1",
Port: "5050",
}
f := fetcherFunc(func(ctx context.Context, addr string) (*upid.UPID, error) {
defer close(fetched)
assert.Equal("127.0.0.1:5050", addr)
return pid, nil
})
go d.poller(f)
// fetch called
select {
case <-fetched: // expected
case <-time.After(1 * time.Second):
t.Fatalf("expected fetch")
}
// read MasterInfo
select {
case mi := <-d.ch:
assert.Equal(mi, CreateMasterInfo(pid))
case <-time.After(1 * time.Second):
t.Fatalf("expected poller to send master info")
}
}
func TestStandalone_pollerFetchedMulti(t *testing.T) {
assert := assert.New(t)
// presence of IP address allows fecher to be called
d := NewStandalone(&mesos.MasterInfo{Ip: proto.Uint32(localhost)})
defer d.Cancel()
d.leaderSyncInterval = 500 * time.Millisecond
i := 0
var wg sync.WaitGroup
wg.Add(4)
f := fetcherFunc(func(ctx context.Context, addr string) (*upid.UPID, error) {
defer func() { i++ }()
switch i {
case 0:
wg.Done()
assert.Equal("127.0.0.1:5050", addr)
return &upid.UPID{ID: "foo@127.0.0.1:5050", Host: "127.0.0.1", Port: "5050"}, nil
case 1:
wg.Done()
assert.Equal("127.0.0.1:5050", addr)
return &upid.UPID{ID: "foo@127.0.0.2:5050", Host: "127.0.0.2", Port: "5050"}, nil
case 2:
wg.Done()
return nil, context.DeadlineExceeded
case 3:
wg.Done()
assert.Equal("127.0.0.1:5050", addr)
return &upid.UPID{ID: "foo@127.0.0.3:5050", Host: "127.0.0.3", Port: "5050"}, nil
default:
d.Cancel()
return nil, context.Canceled
}
})
go d.poller(f)
// fetches complete
ch := make(chan struct{})
go func() {
defer close(ch)
wg.Wait()
}()
changed := make(chan struct{})
go func() {
defer close(changed)
for i := 0; i < 4; i++ {
if mi, ok := <-d.ch; !ok {
t.Fatalf("failed to read master info on cycle %v", i)
break
} else {
switch i {
case 0:
assert.Equal(CreateMasterInfo(&upid.UPID{ID: "foo@127.0.0.1:5050", Host: "127.0.0.1", Port: "5050"}), mi)
case 1:
assert.Equal(CreateMasterInfo(&upid.UPID{ID: "foo@127.0.0.2:5050", Host: "127.0.0.2", Port: "5050"}), mi)
case 2:
assert.Nil(mi)
case 3:
assert.Equal(CreateMasterInfo(&upid.UPID{ID: "foo@127.0.0.3:5050", Host: "127.0.0.3", Port: "5050"}), mi)
}
}
}
}()
started := time.Now()
select {
case <-ch: // expected
case <-time.After(3 * time.Second):
t.Fatalf("expected fetches all complete")
}
select {
case <-changed: // expected
case <-time.After((3 * time.Second) - time.Now().Sub(started)):
t.Fatalf("expected to have received all master info changes")
}
}
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