feat: implement tests and coverage reports for KpiCards and scrapeLakes functionality

scripts/__tests__/scrapeLakes.test.ts

@@ -0,0 +1,25 @@
+import { describe, it, expect } from 'vitest';
+import { parseDateString } from '../scrapeLakes';
+
+describe('scrapeLakes - parseDateString', () => {
+  it('should parse valid date strings correctly', () => {
+    // Note: JS Date parsing uses local timezone, so the output ISO string depends on where the test runs.
+    // To make it deterministic, we just check if it returns a string and is not null.
+    const result = parseDateString('05.06.2026 22:30');
+    expect(result).not.toBeNull();
+    // Assuming standard parsing, it should contain 2026
+    expect(result).toContain('2026-06-05');
+  });
+
+  it('should return null for invalid formats', () => {
+    expect(parseDateString('')).toBeNull();
+    expect(parseDateString('invalid date string')).toBeNull();
+    expect(parseDateString('05.06.2026')).toBeNull(); // Missing time
+    expect(parseDateString('22:30')).toBeNull(); // Missing date
+  });
+
+  it('should return null for malformed parts', () => {
+    expect(parseDateString('99.99.9999 99:99')).toBeNull(); // JS Date might parse this as valid overflow, but let's check
+    expect(parseDateString('abc def ghi')).toBeNull();
+  });
+});

scripts/buildIndex.ts

@@ -26,7 +26,7 @@ const lakes = lakesConfig.map(lake => {
       if (data.length > 0) {
         // Find latest valid record or just the last record
         const lastValidLevelData = [...data].reverse().find(d => d.level !== null && !isNaN(d.level));
-        const lastValidFlowData = [...data].reverse().find(d => d.flow !== null && !isNaN(d.flow) && d.flow > 0);
+        const lastValidFlowData = [...data].reverse().find(d => d.flow !== null && !isNaN(d.flow) && d.flow >= 0);
         
         currentLevel = lastValidLevelData ? lastValidLevelData.level : 0;
         currentFlow = lastValidFlowData ? lastValidFlowData.flow : 0;

scripts/scrapeLakes.ts

@@ -16,7 +16,7 @@ interface DataRecord {
 }
 
 // Parse date from DD.MM.YYYY HH:MM to ISO
-function parseDateString(dateStr: string): string | null {
+export function parseDateString(dateStr: string): string | null {
   try {
     if (!dateStr || !dateStr.includes(' ')) return null;
     const [datePart, timePart] = dateStr.trim().split(' ');
@@ -25,8 +25,12 @@ function parseDateString(dateStr: string): string | null {
     
     if (!year || !hours) return null;
     
-    const d = new Date(parseInt(year), parseInt(month) - 1, parseInt(day), parseInt(hours), parseInt(minutes));
+    const y = parseInt(year);
+    const m = parseInt(month) - 1;
+    const dDay = parseInt(day);
+    const d = new Date(y, m, dDay, parseInt(hours), parseInt(minutes));
     if (isNaN(d.getTime())) return null;
+    if (d.getFullYear() !== y || d.getMonth() !== m || d.getDate() !== dDay) return null;
     return d.toISOString();
   } catch (e) {
     return null;