Unit test code for a model using RSpec, which has a little peculiarity ~ User registration

Introduction

It's completely for me. I will leave the quirky code for unit testing (user registration) of the model.

mail address

user_spec.rb

it 'mail address is,@Must include' do
  @user.email.delete!('@')
  @user.valid?
  expect(@user.errors.full_messages).to include("Email address is incorrect")
end

password

user_spec.rb

it 'The password must be entered with at least 6 characters' do
  @user.password = '12345'
  @user.password_confirmation = @user.password
  @user.valid?
  expect(@user.errors.full_messages).to include("Please enter the password with at least 6 characters")
end

user_spec.rb

it 'The password must be entered without half-width alphabetic characters.' do
  @user.password = '123456'
  @user.password_confirmation = @user.password
  @user.valid?
  expect(@user.errors.full_messages).to include("Password is an invalid value")
end

user_spec.rb

it 'The password must be entered without half-width numbers.' do
  @user.password = 'abcdef'
  @user.password_confirmation = @user.password
  @user.valid?
  expect(@user.errors.full_messages).to include("Password is an invalid value")
end

user_spec.rb

it 'Password cannot be registered with double-byte numbers' do
  @user.password = '１２３４５a'
  @user.password_confirmation = @user.password
  @user.valid?
  expect(@user.errors.full_messages).to include("Password is an invalid value")
end

user_spec.rb

it 'Password and password (Kakunin), value matching is required' do
  @user.password = '12345a'
  @user.password_confirmation = '12345b'
  @user.valid?
  expect(@user.errors.full_messages).to include("The password (Kakunin) and password input do not match")
end