feat: Add checkPassword util function

README.md

@@ -50,6 +50,13 @@ const isValid = validationUtil.checkEmail("user@example.com"); // true
 const isHttpUrl = validationUtil.checkHttpUrl("https://example.com"); // true
 const isDomain = validationUtil.checkDomain("example.com"); // true
 const isBase64 = validationUtil.checkBase64("U29tZSB2YWxpZCBiYXNlNjQgc3RyaW5n"); // true
+const isPasswordValid = validationUtil.checkPassword("Abc123!@#", {
+  minLength: 8,
+  requireUppercase: true,
+  requireLowercase: true,
+  requireNumber: true,
+  requireSpecialChar: true,
+}); // true
 
 // Common utilities
 const empty = commonUtil.isEmpty(""); // true
@@ -87,6 +94,7 @@ const theme = cookieUtil.getCookie("theme");
 - `checkHttpUrl(url: string): boolean` - Validates HTTP/HTTPS URL format
 - `checkDomain(domain: string): boolean` - Validates domain name format
 - `checkBase64(value: string): boolean` - Validates whether a string is a valid base64 encoded value
+- `checkPassword(password: string, options?: { minLength?: number; maxLength?: number; requireUppercase?: boolean; requireLowercase?: boolean; requireNumber?: boolean; requireSpecialChar?: boolean }): boolean` - Validates password strength and requirements
 
 ### CommonUtil
 

package/validationUtil/checkPassword/index.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, test } from "vitest";
+import checkPassword from ".";
+
+describe("checkPassword 유틸 함수 테스트", () => {
+  describe("유효한 비밀번호에 대해 true를 반환해야 합니다.", () => {
+    test("기본 상태는 아무 옵션도 설정되어있지 않기 때문에 true를 반환해야 합니다.", () => {
+      expect(checkPassword("Valid123!", {})).toBe(true);
+    });
+    test("특수 문자가 필요한 경우 true를 반환해야 합니다.", () => {
+      expect(checkPassword("vsdvdsvsdvs1!", { requireSpecialChar: true })).toBe(
+        true
+      );
+    });
+    test("대문자가 필요한 경우 true를 반환해야 합니다.", () => {
+      expect(checkPassword("Vsdvd", { requireUppercase: true })).toBe(true);
+    });
+    test("최소 3자, 최대 5자의 길이를 가져야 하는 경우 true를 반환해야 합니다.", () => {
+      expect(checkPassword("Vsd", { minLength: 3, maxLength: 5 })).toBe(true);
+    });
+  });
+
+  describe("유효하지 않은 비밀번호에 대해 false를 반환해야 합니다.", () => {
+    test("길이가 유효하지 않은 경우 false를 반환해야 합니다.", () => {
+      expect(checkPassword("invalid", { minLength: 3, maxLength: 5 })).toBe(
+        false
+      );
+    });
+    test("특수 문자가 없는 경우 false를 반환해야 합니다.", () => {
+      expect(checkPassword("dffadsfas", { requireSpecialChar: true })).toBe(
+        false
+      );
+    });
+  });
+});

package/validationUtil/checkPassword/index.ts

@@ -0,0 +1,31 @@
+export default function checkPassword(
+  password: string,
+  options?: {
+    minLength?: number;
+    maxLength?: number;
+    requireUppercase?: boolean;
+    requireLowercase?: boolean;
+    requireNumber?: boolean;
+    requireSpecialChar?: boolean;
+  }
+): boolean {
+  const {
+    minLength,
+    maxLength,
+    requireUppercase = false,
+    requireLowercase = false,
+    requireNumber = false,
+    requireSpecialChar = false,
+  } = options || {};
+
+  if (minLength !== undefined && password.length < minLength) return false;
+  if (maxLength !== undefined && password.length > maxLength) return false;
+  const hasUpperCase = requireUppercase ? /[A-Z]/.test(password) : true;
+  const hasLowerCase = requireLowercase ? /[a-z]/.test(password) : true;
+  const hasNumber = requireNumber ? /\d/.test(password) : true;
+  const hasSpecialChar = requireSpecialChar
+    ? /[!@#$%^&*(),.?":{}|<>]/.test(password)
+    : true;
+
+  return hasUpperCase && hasLowerCase && hasNumber && hasSpecialChar;
+}

package/validationUtil/index.ts

@@ -2,3 +2,4 @@ export { default as checkEmail } from "./checkEmail";
 export { default as checkHttpUrl } from "./checkHttpUrl";
 export { default as checkDomain } from "./checkDomain";
 export { default as checkBase64 } from "./checkBase64";
+export { default as checkPassword } from "./checkPassword";