Added tests for starting, stopping and purging daemon for replication…

…Queue (#5973)

common/domain/replication_queue_test.go

@@ -25,12 +25,15 @@ import (
 	"context"
 	"encoding/binary"
 	"errors"
+	"sync/atomic"
 	"testing"
+	"time"
 
 	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
+	"github.com/uber/cadence/common"
 	"github.com/uber/cadence/common/persistence"
 	"github.com/uber/cadence/common/types"
 )
@@ -39,6 +42,93 @@ const (
 	preambleVersion0 byte = 0x59
 )
 
+func TestReplicationQueueImpl_Start(t *testing.T) {
+	tests := []struct {
+		name           string
+		initialStatus  int32
+		expectedStatus int32
+		shouldStart    bool
+	}{
+		{
+			name:           "Should start when initialized",
+			initialStatus:  common.DaemonStatusInitialized,
+			expectedStatus: common.DaemonStatusStarted,
+			shouldStart:    true,
+		},
+		{
+			name:           "Should not start when already started",
+			initialStatus:  common.DaemonStatusStarted,
+			expectedStatus: common.DaemonStatusStarted,
+			shouldStart:    false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctrl := gomock.NewController(t)
+			mockQueue := persistence.NewMockQueueManager(ctrl)
+			rq := NewReplicationQueue(mockQueue, "testCluster", nil, nil).(*replicationQueueImpl)
+			atomic.StoreInt32(&rq.status, tt.initialStatus)
+
+			rq.Start()
+			defer rq.Stop()
+			assert.Equal(t, tt.expectedStatus, atomic.LoadInt32(&rq.status))
+
+			if tt.shouldStart {
+				select {
+				case <-rq.done:
+					t.Error("purgeProcessor should not have stopped")
+				case <-time.After(time.Millisecond):
+					// expected, as the purgeProcessor should still be running
+				}
+			}
+		})
+	}
+}
+
+func TestReplicationQueueImpl_Stop(t *testing.T) {
+	tests := []struct {
+		name           string
+		initialStatus  int32
+		expectedStatus int32
+		shouldStop     bool
+	}{
+		{
+			name:           "Should stop when started",
+			initialStatus:  common.DaemonStatusStarted,
+			expectedStatus: common.DaemonStatusStopped,
+			shouldStop:     true,
+		},
+		{
+			name:           "Should not stop when not started",
+			initialStatus:  common.DaemonStatusInitialized,
+			expectedStatus: common.DaemonStatusInitialized,
+			shouldStop:     false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctrl := gomock.NewController(t)
+			mockQueue := persistence.NewMockQueueManager(ctrl)
+			rq := NewReplicationQueue(mockQueue, "testCluster", nil, nil).(*replicationQueueImpl)
+			atomic.StoreInt32(&rq.status, tt.initialStatus)
+
+			rq.Stop()
+			assert.Equal(t, tt.expectedStatus, atomic.LoadInt32(&rq.status))
+
+			if tt.shouldStop {
+				select {
+				case <-rq.done:
+					// expected channel closed
+				default:
+					t.Error("done channel should be closed")
+				}
+			}
+		})
+	}
+}
+
 func TestReplicationQueueImpl_Publish(t *testing.T) {
 	tests := []struct {
 		name      string