Add unit tests for getDurationParts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/common/time.js

@@ -1,7 +1,7 @@
 import { useI18n } from 'vue-i18n';
 import { useTimeStore } from '@/stores/time';
 
-function getDurationParts(value) {
+export function getDurationParts(value) {
   let negative = (value < 0) ? '-' : '';
   value = Math.abs(value);
 

src/common/time.test.js

@@ -0,0 +1,63 @@
+import { describe, it, expect } from 'vitest';
+import { getDurationParts } from './time.js';
+
+describe('getDurationParts', () => {
+  it('returns all zeros for zero', () => {
+    expect(getDurationParts(0)).toEqual({
+      negative: '',
+      days: 0,
+      hours: 0,
+      minutes: 0,
+      seconds: 0,
+    });
+  });
+
+  it('computes 1d 1h 1m 1s for 90061', () => {
+    expect(getDurationParts(90061)).toEqual({
+      negative: '',
+      days: 1,
+      hours: 1,
+      minutes: 1,
+      seconds: 1,
+    });
+  });
+
+  it('sets negative flag for negative values', () => {
+    const result = getDurationParts(-90061);
+    expect(result.negative).toBe('-');
+    expect(result.days).toBe(1);
+    expect(result.hours).toBe(1);
+    expect(result.minutes).toBe(1);
+    expect(result.seconds).toBe(1);
+  });
+
+  it('computes exactly 1 day for 86400', () => {
+    expect(getDurationParts(86400)).toEqual({
+      negative: '',
+      days: 1,
+      hours: 0,
+      minutes: 0,
+      seconds: 0,
+    });
+  });
+
+  it('computes only seconds for 59', () => {
+    expect(getDurationParts(59)).toEqual({
+      negative: '',
+      days: 0,
+      hours: 0,
+      minutes: 0,
+      seconds: 59,
+    });
+  });
+
+  it('computes hours and minutes without days', () => {
+    expect(getDurationParts(3661)).toEqual({
+      negative: '',
+      days: 0,
+      hours: 1,
+      minutes: 1,
+      seconds: 1,
+    });
+  });
+});