Add MockCWService for testing

aws/cwatch/mock.go

@@ -0,0 +1,43 @@
+package cwatch
+
+import (
+	"sync"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/service/cloudwatch/types"
+)
+
+type MockCWService struct {
+	namespace  string
+	deployment types.Dimension
+	Batcher    []types.MetricDatum
+
+	Stopped bool
+}
+
+func NewMockCWService(accessKey, secretKey, region, namespace, deployment string) (*MockCWService, error) {
+	mockCW := MockCWService{
+		namespace:  namespace,
+		deployment: types.Dimension{Name: aws.String("Deployment"), Value: aws.String(deployment)},
+		Batcher:    nil,
+	}
+
+	return &mockCW, nil
+}
+
+func (s *MockCWService) Queue(d types.MetricDatum) {
+	if s.Stopped {
+		return
+	}
+	s.Batcher = append(s.Batcher, d)
+}
+
+func (s *MockCWService) StartQueue(wg *sync.WaitGroup) {
+	s.Batcher = []types.MetricDatum{}
+}
+
+func (s *MockCWService) StopQueue() {
+	s.Stopped = true
+}
+
+var _ CWService = (*MockCWService)(nil)