Add test

Author: ehmicky

test/helpers/versions.js

@@ -2,5 +2,6 @@ export const FULL_VERSION = '6.0.0'
 export const MAJOR_VERSION = '6'
 export const MAJOR_FULL_VERSION = '6.17.1'
 export const UNKNOWN_VERSION = '6.99.0'
+export const UNKNOWN_ALIAS = 'unknown'
 export const IOJS_VERSION = '4.0.0'
 export const UNSTABLE_VERSION = '0.11.16'

test/main.js

@@ -7,6 +7,7 @@ import {
   MAJOR_VERSION,
   MAJOR_FULL_VERSION,
   UNKNOWN_VERSION,
+  UNKNOWN_ALIAS,
 } from './helpers/versions.js'
 
 test('Keep full versions', async (t) => {
@@ -29,4 +30,8 @@ test('Passes options to all-node-versions', async (t) => {
   )
 })
 
+test('Validates unknown alias', async (t) => {
+  await t.throwsAsync(nodeVersionAlias(UNKNOWN_ALIAS))
+})
+
 const INVALID_MIRROR = 'not_valid_url'