feat: add isUpperCase validator

README.ko.md

@@ -122,6 +122,7 @@ app.listen(3000)
 | `@Uuid(version?, message?)`          | 값이 유효한 UUID 형식이어야 하며, 선택적으로 특정 버전(v1, v3, v4, v5)으로 제한할 수 있습니다.                                | `@Uuid('v4') requestId!: string`                                                           |
 | `@Alpha(message?: string)`           | 문자열에 알파벳(A–Z, a–z)만 포함되어야 합니다.                                                                 | @Alpha() firstName!: string                                                                |
 | `@Alphanumeric(message?: string)`    | 필드에 알파벳과 숫자(A-Z, a-z, 0-9)만 포함되어야 합니다.                                                         | `@Alphanumeric() productCode!: string`                                                     |
+| `@IsUppercase(message?: string)`     | 필드에 대문자만 포함되어야 합니다.                                                                               | `@IsUppercase() countryCode!: string`                                                      |
 | `@With(fieldName: string)`           | 데코레이터가 적용된 필드에 값이 있을 경우, 지정된 대상 필드 (fieldName)도 반드시 값을 가져야 함을 검증하여, 두 필드 간의 필수적인 의존 관계를 설정합니다. | `@With('price') discountRate?: number`                                                     |
 | `@Without(fieldName: string)`        | 데코레이터가 선언된 필드에 값이 있을 경우, 지정된 타겟 필드(fieldName)는 반드시 값이 없어야 함을 검증하여 상호 배타적 관계를 설정합니다.            | `@Without('isGuest') password?: string`                                                    |
 

README.md

@@ -121,6 +121,7 @@ Full guide and API reference:
 | `@Uuid(version?, message?)`          | Validates that the field is a valid UUID, optionally restricted to a specific version (v1, v3, v4, or v5).                                                       | `@Uuid('v4') requestId!: string`                                                           |
 | `@Alpha(message?: string)`           | Validates that the field contains alphabetic characters (A–Z, a–z) only.                                                                                         | @Alpha() firstName!: string                                                                |
 | `@Alphanumeric(message?: string)`    | Validates that the field contains alphanumeric characters (A-Z, a-z, 0-9) only.                                                                                  | `@Alphanumeric() productCode!: string`                                                     |
+| `@IsUppercase(message?: string)`     | Validates that the field contains only uppercase characters.                                                                                                      | `@IsUppercase() countryCode!: string`                                                      |
 | `@With(fieldName: string)`           | Validates that if the decorated field has a value, the specified target field (fieldName) must also have a value, establishing a mandatory dependency.           | `@With('price') discountRate?: number`                                                     |
 | `@Without(fieldName: string)`        | Validates that if the decorated field has a value, the specified target field (fieldName) must NOT have a value, establishing a mutually exclusive relationship. | `@Without('isGuest') password?: string`                                                    |
 

apps/docs/i18n/de/docusaurus-plugin-content-docs/current/decorators/validators.md

@@ -132,6 +132,16 @@ Validiert, dass das dekorierte Feld nur alphanumerische Zeichen enthält (englis
 
 - **`message`** (optional): Die Fehlermeldung, die angezeigt wird, wenn die Validierung fehlschlägt. Wenn weggelassen, wird eine Standardmeldung verwendet.
 
+---
+
+### `@IsUppercase(message?: string)`
+
+Validiert, dass das dekorierte Feld nur Großbuchstaben enthält.
+
+- **`message`** (optional): Die Fehlermeldung, die angezeigt wird, wenn die Validierung fehlschlägt. Wenn weggelassen, wird eine Standardmeldung verwendet.
+
+---
+
 ### `@With(fieldName: string, message?: string)`
 
 Validiert, dass, wenn das dekorierte Feld einen Wert hat, das angegebene Zielfeld (fieldName) ebenfalls einen Wert haben muss, wodurch eine zwingende Abhängigkeit zwischen den beiden Feldern hergestellt wird.

apps/docs/i18n/fr/docusaurus-plugin-content-docs/current/decorators/validators.md

@@ -132,6 +132,16 @@ Valide que le champ décoré contient uniquement des caractères alphanumérique
 
 - **`message`** (optionnel) : Le message d'erreur à afficher lorsque la validation échoue. S'il est omis, un message par défaut sera utilisé.
 
+---
+
+### `@IsUppercase(message?: string)`
+
+Valide que le champ décoré contient uniquement des caractères en majuscules.
+
+- **`message`** (optionnel) : Le message d'erreur à afficher lorsque la validation échoue. S'il est omis, un message par défaut sera utilisé.
+
+---
+
 ### `@With(fieldName: string, message?: string)`
 
 Valide que si le champ décoré a une valeur, le champ cible spécifié (fieldName) doit également avoir une valeur, établissant une dépendance obligatoire entre les deux champs.

apps/docs/i18n/ko/docusaurus-plugin-content-docs/current/decorators/validators.md

@@ -176,6 +176,14 @@ title: 유효성 검사 데코레이터
 
 ---
 
+### `@IsUppercase(message?: string)`
+
+데코레이터가 적용된 필드에 대문자만 포함되어 있는지 검증합니다.
+
+- **`message`** (선택 사항): 검증 실패 시 표시할 메시지. 생략하면 기본 메시지가 사용됩니다.
+
+---
+
 ### `@With(fieldName: string, message?: string)`
 
 데코레이터가 적용된 속성이 값을 가질 경우, 지정된 대상 속성 또한 반드시 값을 가지고 있어야 함을 검증하여 두 속성 간에 필수적인 의존 관계를 설정합니다.

apps/docs/i18n/ru/docusaurus-plugin-content-docs/current/decorators/validators.md

@@ -132,6 +132,16 @@ Express-Cargo использует декораторы для валидаци
 
 - **`message`** (необязательно): Сообщение об ошибке, которое будет отображаться при сбое валидации. Если опущено, будет использоваться сообщение по умолчанию.
 
+---
+
+### `@IsUppercase(message?: string)`
+
+Проверяет, что декорированное поле содержит только символы верхнего регистра.
+
+- **`message`** (необязательно): Сообщение об ошибке, которое будет отображаться при сбое валидации. Если опущено, будет использоваться сообщение по умолчанию.
+
+---
+
 ### `@With(fieldName: string, message?: string)`
 
 Проверяет, что если декорированное поле имеет значение, указанное целевое поле (fieldName) также должно иметь значение, устанавливая обязательную зависимость между двумя полями.

apps/example/README.md

@@ -770,6 +770,28 @@ curl -X POST 'http://localhost:3000/alphanumeric' \
 ```
 ---
 
+### @IsUppercase
+
+```typescript
+class IsUppercaseExample {
+    @Body()
+    @IsUppercase()
+    text!: string
+}
+
+router.post('/is-uppercase', bindingCargo(IsUppercaseExample), (req, res) => {
+    const cargo = getCargo<IsUppercaseExample>(req)
+    res.json(cargo)
+})
+```
+
+```shell
+curl -X POST 'http://localhost:3000/is-uppercase' \
+    -H 'Content-Type: application/json' \
+    -d '{ "text": "HELLO" }'
+```
+---
+
 ### @With
 
 ```typescript

apps/example/src/routers/validator.ts

@@ -23,6 +23,7 @@ import {
     Alpha,
     Uuid,
     Alphanumeric,
+    IsUppercase,
     With,
     Without,
     Enum,
@@ -271,6 +272,17 @@ router.post('/alphanumeric', bindingCargo(AlphanumericExample), (req, res) => {
     res.json(cargo)
 })
 
+class IsUppercaseExample {
+    @Body()
+    @IsUppercase()
+    text!: string
+}
+
+router.post('/is-uppercase', bindingCargo(IsUppercaseExample), (req, res) => {
+    const cargo = getCargo<IsUppercaseExample>(req)
+    res.json(cargo)
+})
+
 class WithExample {
     @Body()
     limit!: number

packages/express-cargo/src/validator.ts

@@ -398,6 +398,25 @@ export function Alphanumeric(message?: cargoErrorMessage): TypedPropertyDecorato
     }
 }
 
+/**
+ * Checks if the string contains only uppercase characters.
+ * @param message - Optional custom error message.
+ */
+export function IsUppercase(message?: cargoErrorMessage): TypedPropertyDecorator<string> {
+    return (target, propertyKey): void => {
+        addValidator(
+            target,
+            propertyKey,
+            new ValidatorRule(
+                propertyKey,
+                'isUppercase',
+                (value: unknown) => typeof value === 'string' && value.toUpperCase() === value,
+                message || `${String(propertyKey)} should be uppercase`,
+            ),
+        )
+    }
+}
+
 /**
  * Validates that if the decorated property has a value, the specified field must also be present.
  * @param fieldName - The name of the required field.

packages/express-cargo/tests/validator/isUppercase.test.ts

@@ -0,0 +1,61 @@
+import { CargoFieldError, IsUppercase } from '../../src'
+import { CargoClassMetadata } from '../../src/metadata'
+
+describe('isUppercase decorator', () => {
+    class Sample {
+        @IsUppercase()
+        uppercaseValue!: string
+
+        noValidatorValue!: string
+    }
+
+    const classMeta = new CargoClassMetadata(Sample.prototype)
+    const meta = classMeta.getFieldMetadata('uppercaseValue')
+    const isUppercaseRule = meta.getValidators()?.find(v => v.type === 'isUppercase')
+
+    it('should have isUppercase validator', () => {
+        expect(isUppercaseRule).toBeDefined()
+        expect(isUppercaseRule?.message).toBe('uppercaseValue should be uppercase')
+    })
+
+    it('should pass for all-uppercase strings', () => {
+        expect(isUppercaseRule?.validate('HELLO')).toBeNull()
+        expect(isUppercaseRule?.validate('HELLO WORLD')).toBeNull()
+        expect(isUppercaseRule?.validate('HELLO123')).toBeNull()
+        expect(isUppercaseRule?.validate('')).toBeNull()
+    })
+
+    it('should fail for strings with lowercase characters', () => {
+        expect(isUppercaseRule?.validate('hello')).toBeInstanceOf(CargoFieldError)
+        expect(isUppercaseRule?.validate('Hello')).toBeInstanceOf(CargoFieldError)
+        expect(isUppercaseRule?.validate('helloWorld')).toBeInstanceOf(CargoFieldError)
+    })
+
+    it('should fail for non-string values', () => {
+        expect(isUppercaseRule?.validate(null)).toBeInstanceOf(CargoFieldError)
+        expect(isUppercaseRule?.validate(undefined)).toBeInstanceOf(CargoFieldError)
+        expect(isUppercaseRule?.validate(123)).toBeInstanceOf(CargoFieldError)
+    })
+
+    it('should not have isUppercase validator on undecorated field', () => {
+        const meta = classMeta.getFieldMetadata('noValidatorValue')
+        const isUppercaseRule = meta.getValidators()?.find(v => v.type === 'isUppercase')
+
+        expect(isUppercaseRule).toBeUndefined()
+    })
+
+    it('should support custom error message', () => {
+        class CustomMessage {
+            @IsUppercase('custom error')
+            value!: string
+        }
+
+        const customMeta = new CargoClassMetadata(CustomMessage.prototype)
+        const meta = customMeta.getFieldMetadata('value')
+        const rule = meta.getValidators()?.find(v => v.type === 'isUppercase')
+
+        const error = rule?.validate('lower')
+        expect(error).toBeInstanceOf(CargoFieldError)
+        expect(error?.message).toBe('custom error')
+    })
+})