class Guard::Compat::Test::Template::Session

def _watches
  keys = @watches.keys
  fail ArgumentError, 'no watches!' if keys.empty?
  fail MultipleGuardNotImplemented if keys.size > 1
  key = keys.first
  fail GlobalWatchesNotImplemented if key.nil?
  @watches[key]
end

def guard(name, _options = {})
  @current = name
  @watches[@current] = []
  yield
  @current = nil
end

def initialize(path, content)
  @watches = {}
  @current = nil
  instance_eval(content, path, 1)
end

def match(file)
  _watches.map do |expr, block|
    next unless (match = file.match(expr))
    block.nil? ? [file] : block.call([file] + match.captures)
  end.flatten.compact.uniq
end

def watch(expr, &block)
  @watches[@current] << [expr, block]
end