feat: implement getTimestamp utility function and corresponding tests

Adds a new utility function `getTimestamp` that returns the current timestamp in ISO string format. Includes unit tests to verify the function's output, ensuring it returns a valid ISO string and is close to the current time.

Author: nickytonline

src/lib/utils/date.test.ts

@@ -0,0 +1,22 @@
+import { describe, it, expect } from 'vitest'
+import { getTimestamp } from './date'
+
+// Helper to check if a string is a valid ISO date
+function isValidISODate(str: string): boolean {
+  const d = new Date(str)
+  return !isNaN(d.getTime()) && str === d.toISOString()
+}
+
+describe('getTimestamp', () => {
+  it('returns a valid ISO string', () => {
+    const ts = getTimestamp()
+    expect(isValidISODate(ts)).toBe(true)
+  })
+
+  it('returns a timestamp close to now', () => {
+    const now = new Date()
+    const ts = new Date(getTimestamp())
+    // Should be within 1 second of now
+    expect(Math.abs(ts.getTime() - now.getTime())).toBeLessThan(1000)
+  })
+})

src/lib/utils/date.ts

@@ -0,0 +1,7 @@
+/**
+ * Get the current timestamp in ISO string format
+ * @returns The current timestamp in ISO string format
+ */
+export const getTimestamp = () => {
+  return new Date().toISOString()
+}