discourse/spec/lib/validators/username_setting_validator_spec.rb

# frozen_string_literal: true

RSpec.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 "with regex support" do
      fab!(:darthvader) { Fabricate(:user, username: "darthvader") }
      fab!(: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