Make events test more deterministic in go1.5

Now scheduler makes order of events pretty random, so I added little
sleeps to make order intact. Also I renamed to test so name better
describes its nature.

Signed-off-by: Alexander Morozov <lk4d4@docker.com>

daemon/events/events_test.go

@@ -1,7 +1,6 @@
 package events
 
 import (
-	"fmt"
 	"testing"
 	"time"
 
@@ -81,55 +80,39 @@ func TestEventsLogTimeout(t *testing.T) {
 	}
 }
 
-func TestLogEvents(t *testing.T) {
+func TestEventsCap(t *testing.T) {
 	e := New()
-
-	for i := 0; i < eventsLimit+16; i++ {
-		action := fmt.Sprintf("action_%d", i)
-		id := fmt.Sprintf("cont_%d", i)
-		from := fmt.Sprintf("image_%d", i)
-		e.Log(action, id, from)
+	for i := 0; i < eventsLimit+1; i++ {
+		e.Log("action", "id", "from")
 	}
-	time.Sleep(50 * time.Millisecond)
+	// let all events go through
+	time.Sleep(1 * time.Second)
+
 	current, l := e.Subscribe()
-	for i := 0; i < 10; i++ {
-		num := i + eventsLimit + 16
-		action := fmt.Sprintf("action_%d", num)
-		id := fmt.Sprintf("cont_%d", num)
-		from := fmt.Sprintf("image_%d", num)
-		e.Log(action, id, from)
+	if len(current) != eventsLimit {
+		t.Fatalf("Must be %d events, got %d", eventsLimit, len(current))
 	}
 	if len(e.events) != eventsLimit {
 		t.Fatalf("Must be %d events, got %d", eventsLimit, len(e.events))
 	}
 
+	for i := 0; i < 10; i++ {
+		e.Log("action", "id", "from")
+	}
+	// let all events go through
+	time.Sleep(1 * time.Second)
+
 	var msgs []*jsonmessage.JSONMessage
 	for len(msgs) < 10 {
-		m := <-l
-		jm, ok := (m).(*jsonmessage.JSONMessage)
-		if !ok {
-			t.Fatalf("Unexpected type %T", m)
+		select {
+		case m := <-l:
+			jm, ok := (m).(*jsonmessage.JSONMessage)
+			if !ok {
+				t.Fatalf("Unexpected type %T", m)
+			}
+			msgs = append(msgs, jm)
+		default:
+			t.Fatalf("There is no enough events in channel")
 		}
-		msgs = append(msgs, jm)
-	}
-	if len(current) != eventsLimit {
-		t.Fatalf("Must be %d events, got %d", eventsLimit, len(current))
-	}
-	first := current[0]
-	if first.Status != "action_16" {
-		t.Fatalf("First action is %s, must be action_16", first.Status)
-	}
-	last := current[len(current)-1]
-	if last.Status != "action_79" {
-		t.Fatalf("Last action is %s, must be action_79", last.Status)
-	}
-
-	firstC := msgs[0]
-	if firstC.Status != "action_80" {
-		t.Fatalf("First action is %s, must be action_80", firstC.Status)
-	}
-	lastC := msgs[len(msgs)-1]
-	if lastC.Status != "action_89" {
-		t.Fatalf("Last action is %s, must be action_89", lastC.Status)
 	}
 }