Fix tests for Cover service

persistence/mock_artist_repo.go

@@ -14,7 +14,7 @@ func CreateMockArtistRepo() *MockArtist {
 
 type MockArtist struct {
 	model.ArtistRepository
-	data map[string]*model.Artist
+	data map[string]model.Artist
 	err  bool
 }
 
@@ -22,19 +22,22 @@ func (m *MockArtist) SetError(err bool) {
 	m.err = err
 }
 
-func (m *MockArtist) SetData(j string, size int) {
-	m.data = make(map[string]*model.Artist)
-	var l = make([]model.Artist, size)
+func (m *MockArtist) SetData(j string) {
+	m.data = make(map[string]model.Artist)
+	var l = model.Artists{}
 	err := json.Unmarshal([]byte(j), &l)
 	if err != nil {
 		fmt.Println("ERROR: ", err)
 	}
 	for _, a := range l {
-		m.data[a.ID] = &a
+		m.data[a.ID] = a
 	}
 }
 
 func (m *MockArtist) Exists(id string) (bool, error) {
+	if m.err {
+		return false, errors.New("Error!")
+	}
 	_, found := m.data[id]
 	return found, nil
 }
@@ -44,7 +47,7 @@ func (m *MockArtist) Get(id string) (*model.Artist, error) {
 		return nil, errors.New("Error!")
 	}
 	if d, ok := m.data[id]; ok {
-		return d, nil
+		return &d, nil
 	}
 	return nil, model.ErrNotFound
 }