Implement password validator with full rule validation and tests

Author: arunkumarakilan

Sprint-3/4-stretch/password-validator.js

@@ -1,5 +1,35 @@
 function passwordValidator(password) {
-    return password.length < 5 ? false : true
+    const previousPassword =["Arun!1621"];
+    const specialChar = ["!", "#", "$", "%", ".", "*", "&"];
+    if (password.length<5)
+    {
+        throw new Error("minimum length is 5");
+    }
+    else if(!/[A-Z]/.test(password))
+    {
+        throw new Error("Need at least one uppercase");
+    }
+    else if (!/[a-z]/.test(password))
+    {
+        throw new Error("Need at least one lower case");
+    }
+    else if (!/[0-9]/.test(password))
+    {
+        throw new Error("need at least one number");
+    }
+    else if(!/["!", "#", "$", "%", ".", "*", "&"]/.test(password))
+    {
+        throw new Error("need at least one special character");
+    }
+    else if (previousPassword.includes(password))
+    {
+        throw new Error("no previous password");
+
+    }
+else
+{
+    return true;
+}
 }
 
 

Sprint-3/4-stretch/password-validator.test.js

@@ -17,10 +17,33 @@ You must breakdown this problem in order to solve it. Find one test case first a
 const isValidPassword = require("./password-validator");
 test("password has at least 5 characters", () => {
     // Arrange
-    const password = "12345";
-    // Act
-    const result = isValidPassword(password);
-    // Assert
-    expect(result).toEqual(true);
+    const password = "Ha!1";
+   expect( ()=> isValidPassword(password)).toThrow();
 }
-);
+);
+test("password has at least one uppercase letter(A-Z)",()=>{
+const password = "harju!1621";
+    
+    
+    expect(()=> isValidPassword(password)).toThrow();
+});
+test("password has at least one lowercase letter (a-z)", ()=>{
+    const password = "HARJU!1621";
+    expect(()=> isValidPassword(password)).toThrow();
+});
+test("password has at least one number (0-9)", ()=>{
+    const password = "Harju!";
+    expect(()=>isValidPassword(password)).toThrow();
+});
+test("password has  at least one special character ",()=>{
+    const password = "Harju1621";
+    expect(()=> isValidPassword(password)).toThrow();
+});
+test("password not match with previous password", ()=>{
+    const password = "Arun!1621";
+    expect(()=> isValidPassword(password)).toThrow();
+});
+test("password meet all the condition", ()=>{
+    const password ="Harju!1621";
+    expect(isValidPassword(password)).toEqual(true);
+});