Fix user obtaining

Author: valerykalashnikov

blamewarrior/users.go

@@ -58,8 +58,10 @@ func SaveUser(q Queryer, u *User) (err error) {
 	).Scan(&u.ID)
 }
 
-func GetUserByNickname(q Queryer, nickname string) (u *User, err error) {
-	err = q.QueryRow(GetUserByNicknameQuery, nickname).Scan(
+func GetUserByNickname(q Queryer, nickname string) (*User, error) {
+	u := &User{}
+
+	err := q.QueryRow(GetUserByNicknameQuery, nickname).Scan(
 		&u.Token,
 		&u.UID,
 		&u.Nickname,

blamewarrior/users_test.go

@@ -51,7 +51,7 @@ func TestSaveUser(t *testing.T) {
 	require.NoError(t, err)
 }
 
-func GetUserByNickname_userExists(t *testing.T) {
+func TestGetUserByNickname_userExists(t *testing.T) {
 	tx, teardown := setup()
 	defer teardown()
 
@@ -76,6 +76,20 @@ func GetUserByNickname_userExists(t *testing.T) {
 
 }
 
+func TestGetUserByNickname_userDoNotExist(t *testing.T) {
+	tx, teardown := setup()
+	defer teardown()
+
+	_, err := tx.Exec("TRUNCATE users;")
+
+	require.NoError(t, err)
+
+	_, err = blamewarrior.GetUserByNickname(tx, "test_user")
+
+	require.Error(t, blamewarrior.UserNotFound)
+
+}
+
 func setup() (tx *sql.Tx, teardownFn func()) {
 	dbName := os.Getenv("DB_NAME")
 	if dbName == "" {