require 'spec_helper'

describe 'Attachment Registry' do
  before do
    Paperclip::AttachmentRegistry.clear
  end

  context '.names_for' do
    it 'includes attachment names for the given class' do
      foo = Class.new
      Paperclip::AttachmentRegistry.register(foo, :avatar, {})

      assert_equal [:avatar], Paperclip::AttachmentRegistry.names_for(foo)
    end

    it 'does not include attachment names for other classes' do
      foo = Class.new
      bar = Class.new
      Paperclip::AttachmentRegistry.register(foo, :avatar, {})
      Paperclip::AttachmentRegistry.register(bar, :lover, {})

      assert_equal [:lover], Paperclip::AttachmentRegistry.names_for(bar)
    end

    it 'produces the empty array for a missing key' do
      assert_empty Paperclip::AttachmentRegistry.names_for(Class.new)
    end
  end

  context '.each_definition' do
    it 'calls the block with the class, attachment name, and options' do
      foo = Class.new
      expected_accumulations = [
        [foo, :avatar, { yo: "greeting" }],
        [foo, :greeter, { ciao: "greeting" }]
      ]
      expected_accumulations.each do |args|
        Paperclip::AttachmentRegistry.register(*args)
      end
      accumulations = []

      Paperclip::AttachmentRegistry.each_definition do |*args|
        accumulations << args
      end

      assert_equal expected_accumulations, accumulations
    end
  end

  context '.definitions_for' do
    it 'produces the attachment name and options' do
      expected_definitions = {
        avatar: { yo: "greeting" },
        greeter: { ciao: "greeting" }
      }
      foo = Class.new
      Paperclip::AttachmentRegistry.register(
        foo,
        :avatar,
        yo: "greeting"
      )
      Paperclip::AttachmentRegistry.register(
        foo,
        :greeter,
        ciao: "greeting"
      )

      definitions = Paperclip::AttachmentRegistry.definitions_for(foo)

      assert_equal expected_definitions, definitions
    end

    it 'produces defintions for subclasses' do
      expected_definitions = { avatar: { yo: "greeting" } }
      foo = Class.new
      bar = Class.new(foo)
      Paperclip::AttachmentRegistry.register(
        foo,
        :avatar,
        expected_definitions[:avatar]
      )

      definitions = Paperclip::AttachmentRegistry.definitions_for(bar)

      assert_equal expected_definitions, definitions
    end

    it 'produces defintions for subclasses but deep merging them' do
      foo_definitions = { avatar: { yo: "greeting" } }
      bar_definitions = { avatar: { ciao: "greeting" } }
      expected_definitions = {
        avatar: {
          yo: "greeting",
          ciao: "greeting"
        }
      }
      foo = Class.new
      bar = Class.new(foo)
      Paperclip::AttachmentRegistry.register(
        foo,
        :avatar,
        foo_definitions[:avatar]
      )
      Paperclip::AttachmentRegistry.register(
        bar,
        :avatar,
        bar_definitions[:avatar]
      )

      definitions = Paperclip::AttachmentRegistry.definitions_for(bar)

      assert_equal expected_definitions, definitions
    end

    it 'allows subclasses to override attachment defitions' do
      foo_definitions = { avatar: { yo: "greeting" } }
      bar_definitions = { avatar: { yo: "hello" } }

      expected_definitions = {
        avatar: {
          yo: "hello"
        }
      }

      foo = Class.new
      bar = Class.new(foo)
      Paperclip::AttachmentRegistry.register(
        foo,
        :avatar,
        foo_definitions[:avatar]
      )
      Paperclip::AttachmentRegistry.register(
        bar,
        :avatar,
        bar_definitions[:avatar]
      )

      definitions = Paperclip::AttachmentRegistry.definitions_for(bar)

      assert_equal expected_definitions, definitions
    end
  end

  context '.clear' do
    it 'removes all of the existing attachment definitions' do
      foo = Class.new
      Paperclip::AttachmentRegistry.register(
        foo,
        :greeter,
        ciao: "greeting"
      )

      Paperclip::AttachmentRegistry.clear

      assert_empty Paperclip::AttachmentRegistry.names_for(foo)
    end
  end
end