enum_uniqueness_spec.rb

# frozen_string_literal: true

RSpec.describe RuboCop::Cop::Rails::EnumUniqueness, :config do
  subject(:cop) { described_class.new }

  context 'when array syntax is used' do
    context 'with a single duplicated enum value' do
      it 'registers an offense' do
        expect_offense(<<~RUBY)
          enum status: [:active, :archived, :active]
                                            ^^^^^^^ Duplicate value `:active` found in `status` enum declaration.
        RUBY
      end
    end

    context 'with several duplicated enum values' do
      it 'registers two offenses' do
        expect_offense(<<~RUBY)
          enum status: [:active, :archived, :active, :active]
                                                     ^^^^^^^ Duplicate value `:active` found in `status` enum declaration.
                                            ^^^^^^^ Duplicate value `:active` found in `status` enum declaration.
        RUBY
      end
    end

    context 'with no duplicated enum values' do
      it 'does not register an offense for unique enum values' do
        expect_no_offenses('enum status: [:active, :archived]')
      end
    end
  end

  context 'when hash syntax is used' do
    context 'with a single duplicated enum value' do
      it 'registers an offense' do
        expect_offense(<<~RUBY)
          enum status: { active: 0, archived: 0 }
                                              ^ Duplicate value `0` found in `status` enum declaration.
        RUBY
      end
    end

    context 'with several duplicated enum values' do
      it 'registers two offenses' do
        expect_offense(<<~RUBY)
          enum status: { active: 0, pending: 0, archived: 0 }
                                                          ^ Duplicate value `0` found in `status` enum declaration.
                                             ^ Duplicate value `0` found in `status` enum declaration.
        RUBY
      end
    end

    context 'with no duplicated enum values' do
      it 'does not register an offense' do
        expect_no_offenses('enum status: { active: 0, pending: 1 }')
      end
    end
  end

  context 'when receiving a variable' do
    it 'does not register an offense' do
      expect_no_offenses(<<~RUBY)
        var = { status: { active: 0, archived: 1 } }
        enum var
      RUBY
    end
  end

  context 'when receiving a hash without literal values' do
    context 'when value is a variable' do
      it 'does not register an offense' do
        expect_no_offenses('enum status: statuses')
      end
    end

    context 'when value is a method chain' do
      it 'does not register an offense' do
        expect_no_offenses('enum status: User.statuses.keys')
      end
    end

    context 'when value is a constant' do
      it 'does not register an offense' do
        expect_no_offenses('enum status: STATUSES')
      end
    end
  end

  context 'when the enum name is a string' do
    it 'registers an offense' do
      expect_offense(<<~RUBY)
        enum "status" => [:active, :archived, :active]
                                              ^^^^^^^ Duplicate value `:active` found in `status` enum declaration.
      RUBY
    end
  end

  context 'when the enum name is not a literal' do
    it 'registers an offense' do
      expect_offense(<<~RUBY)
        enum KEY => [:active, :archived, :active]
                                         ^^^^^^^ Duplicate value `:active` found in `KEY` enum declaration.
      RUBY
    end
  end

  context 'with multiple enum definition for a `enum` method call' do
    it 'registers an offense' do
      expect_offense(<<~RUBY)
        enum status: [:active, :archived, :active],
                                          ^^^^^^^ Duplicate value `:active` found in `status` enum declaration.
             role: [:owner, :member, :guest, :member]
                                             ^^^^^^^ Duplicate value `:member` found in `role` enum declaration.
      RUBY
    end
  end
end