common: Add an Event module (#169)

1 files changed, 92 insertions, 0 deletions

diff --git a/common/event_test.go b/common/event_test.go
new file mode 100644
index 0000000..ca44ddb
--- /dev/null
+++ b/common/event_test.go
@@ -0,0 +1,92 @@
+// Copyright 2018 The dexon-consensus-core Authors
+// This file is part of the dexon-consensus-core library.
+//
+// The dexon-consensus-core library is free software: you can redistribute it
+// and/or modify it under the terms of the GNU Lesser General Public License as
+// published by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// The dexon-consensus-core library 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 Lesser
+// General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the dexon-consensus-core library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+package common
+
+import (
+	"math/rand"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type EventTestSuite struct {
+	suite.Suite
+}
+
+func (s *EventTestSuite) TestTimeEvent() {
+	event := NewEvent()
+	now := time.Now()
+	triggered := make(chan int, 100)
+	trigger := func(id int) func(t time.Time) {
+		return func(t time.Time) {
+			triggered <- id
+		}
+	}
+	event.RegisterTime(now.Add(100*time.Millisecond), trigger(0))
+	event.NotifyTime(now)
+	s.Len(triggered, 0)
+	event.NotifyTime(now.Add(150 * time.Millisecond))
+	s.Len(triggered, 1)
+	triggered = make(chan int, 100)
+	event.NotifyTime(now.Add(150 * time.Millisecond))
+	s.Len(triggered, 0)
+
+	event.RegisterTime(now.Add(100*time.Millisecond), trigger(0))
+	event.RegisterTime(now.Add(100*time.Millisecond), trigger(0))
+	event.RegisterTime(now.Add(100*time.Millisecond), trigger(0))
+	event.RegisterTime(now.Add(100*time.Millisecond), trigger(0))
+	event.NotifyTime(now.Add(150 * time.Millisecond))
+	s.Len(triggered, 4)
+
+	triggered = make(chan int, 100)
+	for i := 0; i < 10; i++ {
+		event.RegisterTime(now.Add(time.Duration(100+i*10)*time.Millisecond),
+			trigger(i))
+	}
+	event.NotifyTime(now.Add(130 * time.Millisecond))
+	s.Require().Len(triggered, 4)
+	for i := 0; i < 4; i++ {
+		j := <-triggered
+		s.Equal(i, j)
+	}
+
+	event = NewEvent()
+	triggered = make(chan int, 100)
+	nums := make([]int, 10)
+	for i := range nums {
+		nums[i] = i
+	}
+	rand.Shuffle(len(nums), func(i, j int) {
+		nums[i], nums[j] = nums[j], nums[i]
+	})
+	for _, i := range nums {
+		event.RegisterTime(now.Add(time.Duration(100+i*10)*time.Millisecond),
+			trigger(i))
+	}
+	event.NotifyTime(now.Add(130 * time.Millisecond))
+	s.Require().Len(triggered, 4)
+	for i := 0; i < 4; i++ {
+		j := <-triggered
+		s.Equal(i, j)
+	}
+}
+
+func TestEvent(t *testing.T) {
+	suite.Run(t, new(EventTestSuite))
+}