test: Added xlsx parsing tests

scrape/api/announcements.ts

@@ -1,3 +1,17 @@
+/*
+ * Copyright (C) 2026 Jakub Žitník
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 const API_BASE_URL = process.env.ANNOUNCEMENT_API || "http://localhost:3000";
 
 export type Announcement = {

scrape/parse/v3.ts

@@ -39,7 +39,7 @@ interface ResolvedDay {
 /**
  * Read theme colors from the workbook
  */
-async function getThemeColors(filePath: string): Promise<ThemeColors | null> {
+export async function getThemeColors(filePath: string): Promise<ThemeColors | null> {
   const data = fs.readFileSync(filePath);
   const zip = await JSZip.loadAsync(data);
 
@@ -164,10 +164,9 @@ export default async function parseV3(workbook: Workbook, downloadedFilePath: st
 // ────────────────────────────────────────────────────────────
 //
 
-function getUpcomingSheets(workbook: ExcelJS.Workbook): ResolvedDay[] {
+export function getUpcomingSheets(workbook: ExcelJS.Workbook, today: Date = new Date()): ResolvedDay[] {
   const dateRegex = /^(pondělí|úterý|středa|čtvrtek|pátek|po|út|ut|st|čt|ct|pa|pá)\s+(\d{1,2})\.+\s*(\d{1,2})\.+\s*(\d{4}|\d{2})/i;
 
-  const today = new Date();
   const todayMidnight = new Date(today.getFullYear(), today.getMonth(), today.getDate());
 
   const result: ResolvedDay[] = [];
@@ -190,7 +189,7 @@ function getUpcomingSheets(workbook: ExcelJS.Workbook): ResolvedDay[] {
   return result;
 }
 
-function groupSheetsByDate(items: ResolvedDay[]) {
+export function groupSheetsByDate(items: ResolvedDay[]) {
   const map: Record<string, Worksheet[]> = {};
 
   for (const item of items) {
@@ -214,7 +213,7 @@ function groupSheetsByDate(items: ResolvedDay[]) {
 // ────────────────────────────────────────────────────────────
 //
 
-function extractDaySchedule(sheet: Worksheet, teacherMap: Record<string, string>, themeColors: ThemeColors | null, flags: Flag[]) {
+export function extractDaySchedule(sheet: Worksheet, teacherMap: Record<string, string>, themeColors: ThemeColors | null, flags: Flag[]) {
   return {
     changes: extractClassChanges(sheet, themeColors, flags),
     absence: extractAbsence(sheet, teacherMap),