Fix nbtb, add tests

backend/testutils/fixtures/fixtures.go

@@ -6,6 +6,7 @@ package fixtures
 import (
 	"context"
 	"fmt"
+	"time"
 
 	"github.com/jackc/pgx/v5/pgxpool"
 	"golang.org/x/crypto/bcrypt"
@@ -202,3 +203,28 @@ func SafeDeleteService(db *pgxpool.Pool, serviceID string) error {
 func SafeDeleteBooking(db *pgxpool.Pool, bookingID string) error {
 	return DeleteBooking(db, bookingID)
 }
+
+// CreateTestTimeBlocker creates a time blocker for testing
+// Returns the blocker ID
+func CreateTestTimeBlocker(pool *pgxpool.Pool, startTime time.Time, durationMinutes int, description string) (string, error) {
+	ctx := context.Background()
+	var blockerID string
+	err := pool.QueryRow(ctx, `
+		INSERT INTO time_blockers (start_time, duration_minutes, description)
+		VALUES ($1, $2, $3)
+		RETURNING id
+	`, startTime, durationMinutes, description).Scan(&blockerID)
+
+	if err != nil {
+		return "", fmt.Errorf("failed to create time blocker: %w", err)
+	}
+
+	return blockerID, nil
+}
+
+// DeleteTimeBlocker removes a time blocker from the database
+func DeleteTimeBlocker(pool *pgxpool.Pool, blockerID string) error {
+	ctx := context.Background()
+	_, err := pool.Exec(ctx, "DELETE FROM time_blockers WHERE id = $1", blockerID)
+	return err
+}