require 'spec_helper' describe UsernameSettingValidator do describe '#valid_value?' do subject(:validator) { described_class.new } it "returns true for blank values" do expect(validator.valid_value?('')).to eq(true) expect(validator.valid_value?(nil)).to eq(true) end it "returns true if value matches an existing user's username" do Fabricate(:user, username: 'vader') expect(validator.valid_value?('vader')).to eq(true) end it "returns false if value does not match a user's username" do expect(validator.valid_value?('no way')).to eq(false) end end end