test: add codecov (#1861)

* test: add codecov

* test: add codecov

core/stores/mongo/collection_test.go

@@ -2,7 +2,9 @@ package mongo
 
 import (
 	"errors"
+	"strings"
 	"testing"
+	"time"
 
 	"github.com/globalsign/mgo"
 	"github.com/golang/mock/gomock"
@@ -266,6 +268,46 @@ func TestCollectionUpsert(t *testing.T) {
 	assert.Equal(t, errDummy, err)
 }
 
+func Test_logDuration(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	col := internal.NewMockMgoCollection(ctrl)
+	c := decoratedCollection{
+		collection: col,
+		brk:        breaker.NewBreaker(),
+	}
+
+	var buf strings.Builder
+	w := logx.NewWriter(&buf)
+	o := logx.Reset()
+	logx.SetWriter(w)
+
+	defer func() {
+		logx.Reset()
+		logx.SetWriter(o)
+	}()
+
+	buf.Reset()
+	c.logDuration("foo", time.Millisecond, nil, "bar")
+	assert.Contains(t, buf.String(), "foo")
+	assert.Contains(t, buf.String(), "bar")
+
+	buf.Reset()
+	c.logDuration("foo", time.Millisecond, errors.New("bar"), make(chan int))
+	assert.Contains(t, buf.String(), "bar")
+
+	buf.Reset()
+	c.logDuration("foo", slowThreshold.Load()+time.Millisecond, errors.New("bar"))
+	assert.Contains(t, buf.String(), "bar")
+	assert.Contains(t, buf.String(), "slowcall")
+
+	buf.Reset()
+	c.logDuration("foo", slowThreshold.Load()+time.Millisecond, nil)
+	assert.Contains(t, buf.String(), "foo")
+	assert.Contains(t, buf.String(), "slowcall")
+}
+
 type mockPromise struct {
 	accepted bool
 	reason   string