oneOf

commands/games/typing-test.js

@@ -25,10 +25,7 @@ module.exports = class TypingTestCommand extends Command {
 					key: 'difficulty',
 					prompt: `What should the difficulty of the game be? Either ${list(difficulties, 'or')}.`,
 					type: 'string',
-					validate: difficulty => {
-						if (difficulties.includes(difficulty.toLowerCase())) return true;
-						return `Invalid difficulty, please enter either ${list(difficulties, 'or')}.`;
-					},
+					oneOf: difficulties,
 					parse: difficulty => difficulty.toLowerCase()
 				}
 			]