require 'rails_helper' describe UsernameValidator do context "#valid_format?" do it 'returns true when username is both valid and available' do expect(UsernameValidator.new('Available').valid_format?).to eq true end it 'returns true when the username is valid but not available' do expect(UsernameValidator.new(Fabricate(:user).username).valid_format?).to eq true end it 'returns false when the username is not valid' do expect(UsernameValidator.new('not valid.name').valid_format?).to eq false end end end