improve coverage

parse.ts

@@ -47,17 +47,15 @@ export const handleArgParsing = <
   for (const opt of requiredOptions) {
     if (
       !parsedArgs.find((arg) =>
-        arg[0] === opt.name || (opt.aliases || []).includes(arg[0])
+        arg[0] === opt.name || opt.aliases.includes(arg[0])
       )
     ) {
       throw new Error(`Argument ${opt.name} is required`)
     }
   }
 
   for (const [arg, value] of parsedArgs) {
-    const opt = options.find((x) =>
-      x.name === arg || (x.aliases || []).includes(arg)
-    )
+    const opt = options.find((x) => x.name === arg || x.aliases.includes(arg))
     const actualType = typeDetect(value)
     if (!opt) throw new Error(`Unknown argument: ${arg}`)
     if (actualType !== opt.type) {

parse_test.ts

@@ -82,4 +82,20 @@ describe('handleArgParsing', () => {
       )
     }
   })
+  it('throws if neither arg nor alias was passed', () => {
+    try {
+      handleArgParsing({
+        options: [{
+          name: 'test',
+          type: 'boolean',
+          required: true,
+          aliases: ['t'],
+        }],
+      }, [])
+    } catch (e) {
+      expect((e as Error).message).toEqual(
+        'Argument test is required',
+      )
+    }
+  })
 })