package main
import "testing"
+import "runtime"
+import "strconv"
import "time"
+func expectMessage(t *testing.T, m *Message, at time.Time, id, say string) {
+ if m.Time != at {
+ t.Fail()
+ }
+ if m.ID != id {
+ t.Fail()
+ }
+ if m.Text != say {
+ t.Fail()
+ }
+}
+
func TestMessageInsertAndRetreive(t *testing.T) {
- say := ""
+ id := "1"
+ say := "'Ello, Mister Polly Parrot!"
at := time.Now()
var zero_time time.Time
store := start_store()
- store.Add <- Message{at, say}
+ store.Add <- &Message{at, id, say}
messages_from_store := make(chan []Message, 1)
- store.Get <- StoreRequest{zero_time, messages_from_store}
+ store.Get <- &StoreRequest{zero_time, messages_from_store}
messages := <-messages_from_store
if len(messages) != 1 {
- t.Fail()
+ t.FailNow()
}
- if messages[0].Time != at {
- t.Fail()
+ expectMessage(t, &messages[0], at, id, say)
+ close(store.Get)
+ close(store.Add)
+}
+
+func TestFetchBlocksUntilSpeak(t *testing.T) {
+ start_fetch_wait_count := fetch_wait_count.String()
+ id := "2"
+ say := "I've got a lovely fresh cuttle fish for you"
+ at := time.Now()
+ var zero_time time.Time
+ store := start_store()
+ messages_from_store := make(chan []Message, 1)
+ store.Get <- &StoreRequest{zero_time, messages_from_store}
+ for start_fetch_wait_count == fetch_wait_count.String() {
+ runtime.Gosched()
+ }
+ store.Add <- &Message{at, id, say}
+ messages := <-messages_from_store
+ if len(messages) != 1 {
+ t.FailNow()
+ }
+ expectMessage(t, &messages[0], at, id, say)
+ close(store.Get)
+ close(store.Add)
+}
+
+func TestMultipleListeners(t *testing.T) {
+ id := "3"
+ say := "This is your nine o'clock alarm call!"
+ at := time.Now()
+ var zero_time time.Time
+ store := start_store()
+ const num_clients = 13
+ var messages_from_store [num_clients]chan []Message
+ for i := 0; i < num_clients; i++ {
+ messages_from_store[i] = make(chan []Message, 1)
+ store.Get <- &StoreRequest{zero_time, messages_from_store[i]}
+ }
+ store.Add <- &Message{at, id, say}
+ for i := 0; i < num_clients; i++ {
+ messages := <-messages_from_store[i]
+ if len(messages) != 1 {
+ t.FailNow()
+ }
+ expectMessage(t,& messages[0], at, id, say)
+ }
+ close(store.Get)
+ close(store.Add)
+}
+
+func parseDuration(s string) time.Duration {
+ d, err := time.ParseDuration(s)
+ if err != nil {
+ panic(err)
+ }
+ return d
+}
+
+func atoi(s string) int {
+ i, err := strconv.Atoi(s)
+ if err != nil {
+ panic(err)
+ }
+ return i
+}
+
+func TestPartialRetreive(t *testing.T) {
+ start_speak_count := atoi(speak_count.String())
+ id1 := "4"
+ id2 := "5"
+ id3 := "6"
+ say1 := "No, no.....No, 'e's stunned!"
+ say2 := "You stunned him, just as he was wakin' up!"
+ say3 := "Norwegian Blues stun easily, major."
+ base := time.Now()
+ at1 := base.Add(parseDuration("-4m"))
+ since := base.Add(parseDuration("-3m"))
+ at2 := base.Add(parseDuration("-2m"))
+ at3 := base.Add(parseDuration("-1m"))
+ store := start_store()
+ store.Add <- &Message{at1, id1, say1}
+ store.Add <- &Message{at2, id2, say2}
+ store.Add <- &Message{at3, id3, say3}
+ for atoi(speak_count.String()) != start_speak_count+3 {
+ runtime.Gosched()
+ }
+ messages_from_store := make(chan []Message, 1)
+ store.Get <- &StoreRequest{since, messages_from_store}
+ messages := <-messages_from_store
+ if len(messages) != 2 {
+ t.FailNow()
+ }
+ expectMessage(t, &messages[0], at2, id2, say2)
+ expectMessage(t, &messages[1], at3, id3, say3)
+ close(store.Get)
+ close(store.Add)
+}
+
+func TestPrecisePartialRetreive(t *testing.T) {
+ start_speak_count := atoi(speak_count.String())
+ id1 := "7"
+ id2 := "8"
+ id3 := "9"
+ say1 := "Well, he's...he's, ah...probably pining for the fjords."
+ say2 := "PININ' for the FJORDS?!?!?!?"
+ say3 := "look, why did he fall flat on his back the moment I got 'im home?"
+ base := time.Now()
+ at1 := base.Add(parseDuration("-3m"))
+ at2 := base.Add(parseDuration("-2m"))
+ at3 := base.Add(parseDuration("-1m"))
+ since := at2
+ store := start_store()
+ store.Add <- &Message{at1, id1, say1}
+ store.Add <- &Message{at2, id2, say2}
+ store.Add <- &Message{at3, id3, say3}
+ for atoi(speak_count.String()) != start_speak_count+3 {
+ runtime.Gosched()
+ }
+ messages_from_store := make(chan []Message, 1)
+ store.Get <- &StoreRequest{since, messages_from_store}
+ messages := <-messages_from_store
+ if len(messages) != 1 {
+ t.FailNow()
+ }
+ expectMessage(t, &messages[0], at3, id3, say3)
+ close(store.Get)
+ close(store.Add)
+}
+
+func TestTypicalFlow(t *testing.T) {
+ id1 := "10"
+ id2 := "11"
+ say1 := "The Norwegian Blue prefers kippin' on it's back!"
+ say2 := "Remarkable bird, innit, squire? Lovely plumage!"
+ store := start_store()
+
+ // A waiting zero-time fetch.
+ var zero_time time.Time
+ prev_fetch_wait_count := fetch_wait_count.String()
+ fetch1 := make(chan []Message, 1)
+ store.Get <- &StoreRequest{zero_time, fetch1}
+ for prev_fetch_wait_count == fetch_wait_count.String() {
+ runtime.Gosched()
}
- if messages[0].Text != say {
+
+ // Someone speaks. This triggers delivery.
+ at1 := time.Now()
+ store.Add <- &Message{at1, id1, say1}
+ messages1 := <-fetch1
+ if len(messages1) != 1 {
+ t.FailNow()
+ }
+ expectMessage(t, &messages1[0], at1, id1, say1)
+
+ // Upon recipt, client blocks on fetch with since=at1
+ prev_fetch_wait_count = fetch_wait_count.String()
+ fetch2 := make(chan []Message, 1)
+ store.Get <- &StoreRequest{at1, fetch2}
+ for prev_fetch_wait_count == fetch_wait_count.String() {
+ runtime.Gosched()
+ }
+
+ // Someone speaks again. This triggers another delivery.
+ at2 := time.Now()
+ if !at2.After(at1) {
t.Fail()
}
+ store.Add <- &Message{at2, id2, say2}
+ messages2 := <-fetch2
+ if len(messages2) != 1 {
+ t.FailNow()
+ }
+ expectMessage(t, &messages2[0], at2, id2, say2)
+
+ close(store.Get)
+ close(store.Add)
}
projects / reliable-chat / blobdiff