require 'rails_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 context "regex support" do let!(:darthvader) { Fabricate(:user, username: 'darthvader') } let!(:luke) { Fabricate(:user, username: 'luke') } it "returns false if regex doesn't match" do v = described_class.new(regex: 'darth') expect(v.valid_value?('luke')).to eq(false) expect(v.valid_value?('vader')).to eq(false) end it "returns true if regex matches" do v = described_class.new(regex: 'darth') expect(v.valid_value?('darthvader')).to eq(true) end it "returns false if regex matches but username doesn't match a user" do v = described_class.new(regex: 'darth') expect(v.valid_value?('darthmaul')).to eq(false) end end end end