discourse/spec/services/username_checker_service_spec.rb

# frozen_string_literal: true

RSpec.describe UsernameCheckerService do
  describe "#check_username" do
    before do
      @service = UsernameCheckerService.new
      @nil_email = nil
      @email = "vincentvega@example.com"
    end

    context "when username is invalid" do
      it "rejects too short usernames" do
        result = @service.check_username("a", @nil_email)
        expect(result).to have_key(:errors)
      end

      it "rejects too long usernames" do
        result = @service.check_username("a123456789b123456789c123456789", @nil_email)
        expect(result).to have_key(:errors)
      end

      it "rejects usernames with invalid characters" do
        result = @service.check_username("vincent-", @nil_email)
        expect(result).to have_key(:errors)
      end

      it "rejects usernames that do not start with an alphanumeric character" do
        result = @service.check_username(".vincent", @nil_email)
        expect(result).to have_key(:errors)
      end

      context "with reserved usernames" do
        before { SiteSetting.reserved_usernames = "test|donkey" }

        it "rejects usernames that are reserved" do
          result = @service.check_username("test", @nil_email)
          expect(result[:available]).to eq(false)
        end

        it "allows reserved username checker to be skipped" do
          @service = UsernameCheckerService.new(allow_reserved_username: true)
          result = @service.check_username("test", @nil_email)
          expect(result[:available]).to eq(true)
        end
      end
    end

    it "username not available locally" do
      User.stubs(:username_available?).returns(false)
      UserNameSuggester.stubs(:suggest).returns("einar-j")
      result = @service.check_username("vincent", @nil_email)
      expect(result[:available]).to eq(false)
      expect(result[:suggestion]).to eq("einar-j")
    end

    it "username available locally" do
      User.stubs(:username_available?).returns(true)
      result = @service.check_username("vincent", @nil_email)
      expect(result[:available]).to eq(true)
    end
  end
end