fix(tags): slice access out of range (#693)

* fix(tags): slice access out of range

* test: add test for case when there are no tags defined

internal/pkg/api/repository/result/mongo.go

@@ -116,9 +116,12 @@ func (r *MongoRepository) GetTags(ctx context.Context) (tags []string, err error
 	if err != nil {
 		return nil, err
 	}
-	sortedResult := result[0].Tags
-	sort.Sort(sort.StringSlice(sortedResult))
-	return sortedResult, nil
+	tags = []string{}
+	if len(result) > 0 {
+		tags = result[0].Tags
+		sort.Sort(sort.StringSlice(tags))
+	}
+	return tags, nil
 }
 
 func (r *MongoRepository) Insert(ctx context.Context, result testkube.Execution) (err error) {

internal/pkg/api/repository/result/mongo_test.go

@@ -18,7 +18,7 @@ const (
 	mongoDbName = "testkube"
 )
 
-func TestFilters(t *testing.T) {
+func TestStorage(t *testing.T) {
 	assert := require.New(t)
 
 	repository, err := getRepository()
@@ -235,6 +235,23 @@ func TestFilters(t *testing.T) {
 		assert.NoError(err)
 		assert.Len(tags, numberOfTags)
 	})
+
+}
+
+func TestTags(t *testing.T) {
+	assert := require.New(t)
+
+	repository, err := getRepository()
+	assert.NoError(err)
+
+	err = repository.Coll.Drop(context.TODO())
+	assert.NoError(err)
+
+	t.Run("getting tags when there are no tags should return empty slice", func(t *testing.T) {
+		tags, err := repository.GetTags(context.Background())
+		assert.NoError(err)
+		assert.Len(tags, 0)
+	})
 }
 
 func getRepository() (*MongoRepository, error) {