class RSpec::Matchers::BuiltIn::Satisfy

def block_representation
  if (block_snippet = extract_block_snippet)
    "expression `#{block_snippet}`"
  else
    'block'
  end
end

def block_representation
  'block'
end

def description
  @description ||= "satisfy #{block_representation}"
end

def extract_block_snippet
  return nil unless @block
  Expectations::BlockSnippetExtractor.try_extracting_single_line_body_of(@block, matcher_name)
end

def failure_message
  "expected #{actual_formatted} to #{description}"
end

def failure_message_when_negated
  "expected #{actual_formatted} not to #{description}"
end

def initialize(description=nil, &block)
  @description = description
  @block = block
end

def matches?(actual, &block)
  @block = block if block
  @actual = actual
  @block.call(actual)
end