Drying out

2026-05-27 15:18:29 +02:00
parent 7cef6da5f2
commit 3e8a2092cd
8 changed files with 89 additions and 106 deletions
@@ -6,9 +6,11 @@ import {
  clampToDay,
  parseTime,
  formatMinutes,
-  getDaysAgo,
  getToday,
+  getDaysAgo,
  timeToMinutes,
+  adjustForTimezone,
+  getLocalOffsetFromReference,
 } from '../../src/utils/time';

 describe('formatMinutesAfter', () => {
@@ -113,3 +115,24 @@ describe('timeToMinutes', () => {
    expect(timeToMinutes('23:59')).toBe(1439);
  });
 });
+
+describe('adjustForTimezone', () => {
+  it('adjusts minutes by the local timezone offset', () => {
+    const utcMins = 600; // 10:00 UTC
+    const adjusted = adjustForTimezone(utcMins);
+    const offset = new Date().getTimezoneOffset();
+    expect(adjusted).toBe(utcMins - offset);
+  });
+});
+
+describe('getLocalOffsetFromReference', () => {
+  it('returns local offset from reference in minutes', () => {
+    const utcMins = 600; // 10:00 UTC
+    const refTime = '07:00'; // 07:00 reference
+    const offset = getLocalOffsetFromReference(utcMins, refTime);
+    
+    const localMins = adjustForTimezone(utcMins);
+    const refMins = timeToMinutes(refTime);
+    expect(offset).toBe(localMins - refMins);
+  });
+});