chore: create unit tests for parse-duration

@vates/parse-duration/index.js

@@ -6,6 +6,9 @@ exports.parseDuration = value => {
   if (typeof value === 'number') {
     return value
   }
+  if (typeof value !== 'string' || value === '') {
+    throw new TypeError(`not a valid duration: ${value}`)
+  }
   const duration = ms(value)
   if (duration === undefined) {
     throw new TypeError(`not a valid duration: ${value}`)

@vates/parse-duration/parse-duration.test.mjs

@@ -0,0 +1,22 @@
+import { describe, it } from 'node:test'
+import assert from 'node:assert/strict'
+import { parseDuration } from '@vates/parse-duration/index.js'
+
+describe('`ms` without magic: always parse a duration and throws if invalid.', () => {
+  it('should parse string "2 days"', () => {
+    const input = '2 days'
+    const expected = 172800000
+    assert.strictEqual(parseDuration(input), expected)
+  })
+
+  it('should return the same duration if it is already in milliseconds', () => {
+    const input = 172800000
+    const expected = 172800000
+    assert.strictEqual(parseDuration(input), expected)
+  })
+
+  it('should throw an error for an undefined duration', () => {
+    const input = undefined
+    assert.throws(() => parseDuration(input), { message: 'not a valid duration: undefined' })
+  })
+})

CHANGELOG.unreleased.md

@@ -37,6 +37,7 @@
 
 <!--packages-start-->
 
+- @vates/parse-duration minor
 - xo-server minor
 - xo-server-perf-alert minor
 - xo-web minor