Don't send empty messages

[reliable-chat] / server / server_test.go

diff --git a/server/server_test.go b/server/server_test.go
index 9fabf81995cea230431b5a22ea2b5655b3a4d5eb..7f3434ca52b82d76a12abb1a64e07b9eeec2bfa5 100644 (file)
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -1,26 +1,286 @@
+/*  reliable-chat - multipath chat
+ *  Copyright (C) 2012  Scott Worley <sworley@chkno.net>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+

 package main
 
 import "testing"
 package main
 
 import "testing"

+import "runtime"
+import "strconv"

 import "time"
 
 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) {
 func TestMessageInsertAndRetreive(t *testing.T) {

-       say := ""
+       id := "1"
+       say := "'Ello, Mister Polly Parrot!"

        at := time.Now()
        var zero_time time.Time
        store := start_store()
        at := time.Now()
        var zero_time time.Time
        store := start_store()

-       store.Add <- &Message{at, say}
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       store.Add <- &Message{at, id, say}

        messages_from_store := make(chan []Message, 1)
        store.Get <- &StoreRequest{zero_time, messages_from_store}
        messages := <-messages_from_store
        if len(messages) != 1 {
        messages_from_store := make(chan []Message, 1)
        store.Get <- &StoreRequest{zero_time, messages_from_store}
        messages := <-messages_from_store
        if len(messages) != 1 {

-               t.Fail()
+               t.FailNow()
+       }
+       expectMessage(t, &messages[0], at, id, say)
+}
+
+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()
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       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()

        }
        }

-       if messages[0].Time != at {
+       store.Add <- &Message{at, id, say}
+       messages := <-messages_from_store
+       if len(messages) != 1 {
+               t.FailNow()
+       }
+       expectMessage(t, &messages[0], at, id, say)
+}
+
+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()
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       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)
+       }
+}
+
+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()
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       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)
+}
+
+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()
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       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)
+}
+
+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()
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       // 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()
+       }
+
+       // 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()
        }
                t.Fail()
        }

-       if messages[0].Text != say {
+       store.Add <- &Message{at2, id2, say2}
+       messages2 := <-fetch2
+       if len(messages2) != 1 {
+               t.FailNow()
+       }
+       expectMessage(t, &messages2[0], at2, id2, say2)
+}
+
+func TestExpiryDueToLimit(t *testing.T) {
+       previous_limit := *max_messages
+       defer func() { *max_messages = previous_limit }()
+       *max_messages = 2
+
+       start_speak_count := atoi(speak_count.String())
+       start_drop_count := atoi(drop_due_to_limit_count.String())
+       id1 := "12"
+       id2 := "13"
+       id3 := "14"
+       say1 := "'E's passed on!"
+       say2 := "This parrot is no more!"
+       say3 := "He has ceased to be!"
+       base := time.Now()
+       at1 := base.Add(parseDuration("-3m"))
+       at2 := base.Add(parseDuration("-2m"))
+       at3 := base.Add(parseDuration("-1m"))
+       store := start_store()
+       defer func() {
+               close(store.Get)
+               close(store.Add)
+       }()
+
+       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()
+       }
+       if atoi(drop_due_to_limit_count.String()) != start_drop_count+1 {

                t.Fail()
        }
                t.Fail()
        }

-       close(store.Get)
-       close(store.Add)
+       messages_from_store := make(chan []Message, 1)
+       var zero_time time.Time
+       store.Get <- &StoreRequest{zero_time, 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)

 }
 }