fix: error types

Author: chenasraf

src/command.ts

@@ -13,7 +13,7 @@ import {
   Prefixes,
   FlagConfig,
 } from './option'
-import { DeepRequired, setOrPush, deepMerge, getErrorMessage } from './utils'
+import { DeepRequired, setOrPush, deepMerge, getErrorMessage, capitalize } from './utils'
 import { MassargExample, ExampleConfig } from './example'
 import { format } from './style'
 
@@ -187,7 +187,7 @@ export class MassargCommand<Args extends ArgsObject = ArgsObject> {
   flag(config: FlagConfig | MassargFlag): MassargCommand<Args> {
     try {
       const flag = config instanceof MassargFlag ? config : new MassargFlag(config)
-      this.assertNotDuplicate(flag)
+      this.assertNotDuplicate(flag, 'flag')
       this.options.push(flag as MassargOption)
       return this
     } catch (e) {
@@ -227,7 +227,7 @@ export class MassargCommand<Args extends ArgsObject = ArgsObject> {
         config instanceof MassargOption
           ? config
           : MassargOption.fromTypedConfig(config as TypedOptionConfig<T, A>)
-      this.assertNotDuplicate(option)
+      this.assertNotDuplicate(option, 'option')
       this.assertOnlyOneDefault<T, A>(option)
       this.options.push(option as MassargOption)
       return this
@@ -243,12 +243,15 @@ export class MassargCommand<Args extends ArgsObject = ArgsObject> {
     }
   }
 
-  private assertNotDuplicate<T = string, A extends ArgsObject = Args>(option: MassargOption<T, A>) {
-    const existingName = this.options.find((c) => c.name === option.name))
+  private assertNotDuplicate<T = string, A extends ArgsObject = Args>(
+    option: MassargOption<T, A>,
+    type: 'option' | 'flag',
+  ) {
+    const existingName = this.options.find((c) => c.name === option.name)
     if (existingName) {
       throw new ValidationError({
-        code: 'duplicate_option_name',
-        message: `Option name "${existingName.name}" already exists`,
+        code: `duplicate_${type}_name`,
+        message: `${capitalize(type)} name "${existingName.name}" already exists`,
         path: [this.name, option.name],
       })
     }

src/utils.ts

@@ -87,6 +87,11 @@ export function deepMerge<T1, T2>(obj1: T1, obj2: T2): NonNullable<T1> & NonNull
   }
   return res
 }
+
+export function capitalize(str: string): string {
+  return str[0].toUpperCase() + str.slice(1)
+}
+
 /**
  * Splits a name into words, using camelCase, PascalCase, snake_case, and kebab-case or
  * regular spaced strings.

test/help.test.ts

@@ -99,9 +99,7 @@ describe('prints help from option', () => {
       .help({
         bindOption: true,
       })
-    const log = jest.spyOn(console, 'log').mockImplementation((...a) => {
-      console.info(...a)
-    })
+    const log = jest.spyOn(console, 'log').mockImplementation(() => {})
     command.parse(['--help'])
     expect(log).toHaveBeenCalled()
   })

test/option.test.ts

@@ -38,7 +38,7 @@ describe('option', () => {
           aliases: [],
           defaultValue: '',
         }),
-    ).toThrow('Option "test2" already exists')
+    ).toThrow('test.test2: Option name "test2" already exists')
   })
   test('default', () => {
     const command = massarg(opts)
@@ -108,7 +108,7 @@ describe('flag', () => {
       massarg(opts)
         .flag({ name: 'test2', description: 'test2', aliases: [] })
         .flag({ name: 'test2', description: 'test2', aliases: [] }),
-    ).toThrow('Flag "test2" already exists')
+    ).toThrow('test.test2: Flag name "test2" already exists')
   })
   test('validate', () => {
     expect(() =>