Odtnhj

In the following code, I pass a FormControl which contains a password. I expect that when the password is aA1[11], the RegExp.test method should return false but it returns true! Why my code is returning null instead of error object
validatePassword:
valid: false,
message: 'password must contain 1 small-case letter [a-z], 1 capital letter [A-Z], 1 digit[0-9], 1 special character and the length should be between 6-10 characters'


Shouldn't this forward look up fail the match (?=.*[!@#$%^&*()_+":'?&gt.<,])

 validatePassword(control: FormControl) 

 let password: string = control.value;
 /* So the rule for password is
 6-10 length
 contains a digit
 contains a lower case alphabet
 contains an upper case alphabet
 contains one more special character from the list !@#$%^&*()_+":;'?/>.<,
 does not contain space
 */
 let REG_EXP = new RegExp('(?=^.6,10$)(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!@#$%^&*()_+":'?&gt.<,])(?!.*\s).*$');
 /*RegExp's test method returns true if it finds a match, otherwise it returns false*/
 console.log('password: ',password);
 console.log('test result ',(REG_EXP.test(password)));
 return (REG_EXP.test(password)) ? null : 
 validatePassword: //check the class ShowErrorsComponent to see how validatePassword is used.
 valid: false,
 message: 'password must contain 1 small-case letter [a-z], 1 capital letter [A-Z], 1 digit[0-9], 1 special character and the length should be between 6-10 characters'
 
 
 

I am calling the above function from my Karma test case

fit('A password of length between 6-10 characters and containing at least 1 digit, at least 1 lowercase letter, at least 1 upper case ' +
 'letter and but NOT at least 1 special character from the list !@#$%^&*()_+{":;'?/>.<, shall NOT be accepted',
 inject([HttpClient,HttpTestingController],(httpClient:HttpClient)=>
 let helper = new HelperService(loaderService,httpClient);
 let passwordField = new FormControl();
 let password = 'aA1[11]';
 passwordField.setValue(password);
 let result = helper.validatePassword(passwordField);
 expect(result).toEqual(expectedErrorResponse);
 ));

The output I see in the console is

password: aA1[11]
test result true

You can use below code to validate a password-

validatePassword(control: FormControl) 
 let password: string = control.value;

 let REG_EXP = /^(?=.*d)(?=.*[#$@!%&*?])[A-Za-zd#$@!%&*?]6,10$/i; // modify as per your requirement, currently it accept atleast 1 character,1 special character,1 [0-9] number, length between 6 to 10.

 if(!REG_EXP.test(password)) 
 return 'validatePassword': //check the class ShowErrorsComponent to see how validatePassword is used.
 'valid': false,
 'message': 'password must contain 1 small-case letter [a-z], 1 capital letter [A-Z], 1 digit[0-9], 1 special character and the length should be between 6-10 characters'
 
 
 
 

The issue was with regex. I changed &amp to just & and &quot to " and &gt to > and &lt to <. It seems that in my code (angular), the letters after & were being treated literally. so the a in aA1[11] was matched with a in &amp