ruby on rails - test for specific phone number of digits - ruby-on-rails

Question

This is my code
test 'phonenumber should be 11 digits' do
#user.phonenumber = 11
assert_not #user.valid?
end
this is my model validations, i am using the gem phonelibs
class User < ApplicationRecord
before_save { email.downcase! }
validates :name, presence: true, length: { maximum: 50 }
validates :phonenumber, phone: { possible: true, allow_blank: true }
VALID_EMAIL_REGEX = /\A[\w+\-.]+#[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i
validates :email, presence: true, length: { maximum: 256 },
format: { with: VALID_EMAIL_REGEX },
uniqueness: { case_sensitive: false }
has_secure_password
validates :password, presence: true, length: { minimum: 6 }
end
this already added the validations because it uses the Google libphonenumber and for Nigeria, it is 11
Phonelib.default_country = 'NG'
but it isnt testing for the exact digits of phone number

Answer 1

You've used a couple of length validations elsewhere - I'd suggest you need the same for your phonenumber field before it will fail validations for being too short.
I.E.
validates_length_of :phonenumber, is: 11
or
validates :phonenumber, length: { is: 11 }
or using a regex:
validates_format_of :phonenumber, with: /[0-9]{11}/
Docs can be found here - hope that helps!
PhoneLib has a lot of extra functionality based on countries and their phone number formats - the best approach here would be to dig properly into that and use their validations based on either a fixed or user-based location.
However, the above should work for ensuring the length of the phonenumber is 11.
Update:
The gem has a number of methods for checking validity of phone numbers, such as the following:
Phonelib.valid? '123456789'
Phonelib.valid_for_country? '123456789', 'XX'
You also need to configure the gem in config/initializers/phonelib.rb - if you could add that code to your question that would be useful.
However, to make use of this, your test could look something like:
test 'phonenumber should be 11 digits' do
#user.phonenumber = 11
assert_not Phonelib.valid?(#user.phonenumber)
end