class Shoulda::Matchers::Integrations::Configuration

def self.apply(&block)
  new(&block).apply
end

def apply
  if no_test_frameworks_added? && no_libraries_added?
    raise ConfigurationError, <<EOT
matchers is not configured correctly. You need to specify at least one
mework and/or library. For example:
:Matchers.configure do |config|
.integrate do |with|
.test_framework :rspec
.library :rails
  end
  @test_frameworks.each do |test_framework|
    test_framework.include(Shoulda::Matchers::Independent)
    @libraries.each { |library| library.integrate_with(test_framework) }
  end
  self
end

def clear_default_test_framework
  @test_frameworks.select!(&:present?)
end

def initialize(&block)
  @test_frameworks = Set.new
  @libraries = Set.new
  test_framework :missing_test_framework
  library :missing_library
  block.call(self)
end

def library(name)
  @libraries << Integrations.find_library!(name)
end

def no_libraries_added?
  @libraries.empty?
end

def no_test_frameworks_added?
  @test_frameworks.empty? || !@test_frameworks.any?(&:present?)
end

def test_framework(name)
  clear_default_test_framework
  @test_frameworks << Integrations.find_test_framework!(name)
end