added tests for db and user

Backend/database.go

@@ -7,39 +7,17 @@ import (
 	"fmt"
 )
 
-func OpenDatabase() (*sql.DB, error) {
+func OpenDatabase() (models.IDatabase, error) {
 	dbHost := helper.GetEnv("POSTGRES_HOST", "localhost")
 	dbName := helper.GetEnv("POSTGRES_DB", "arbeitszeitmessung")
 	dbUser := helper.GetEnv("POSTGRES_API_USER", "api_nutzer")
 	dbPassword := helper.GetEnv("POSTGRES_API_PASS", "password")
 
 	connStr := fmt.Sprintf("postgres://%s:%s@%s:5432/%s?sslmode=disable&TimeZone=Europe/Berlin", dbUser, dbPassword, dbHost, dbName)
-	return sql.Open("postgres", connStr)
-}
-
-func GetBookingsByCardID(db *sql.DB, card_id string) ([]models.Booking, error) {
-	qStr, err := db.Prepare((`SELECT * FROM anwesenheit WHERE card_id = $1`))
+	db, err := sql.Open("postgres", connStr)
 	if err != nil {
 		return nil, err
 	}
-	var bookings []models.Booking
-	rows, err := qStr.Query(card_id)
-	if err == sql.ErrNoRows {
-		return bookings, err
-	}
-	if err != nil {
-		return nil, err
-	}
-	defer rows.Close()
-	for rows.Next() {
-		var booking models.Booking
-		if err := rows.Scan(&booking.CounterId, &booking.Timestamp, &booking.CardUID, &booking.GeraetID, &booking.CheckInOut); err != nil {
-			return bookings, err
-		}
-		bookings = append(bookings, booking)
-	}
-	if err = rows.Err(); err != nil {
-		return bookings, err
-	}
-	return bookings, nil
+	defer db.Close()
+	return db, err
 }