module Minitest

def self.plugin_line_init(options)
  exp_line = options[:line]
  if !exp_line
    reporter.reporters << LineReporter.new
    return
  end
  methods = Runnable.runnables.flat_map do |runnable|
    runnable.runnable_methods.map do |name|
      [name, runnable.instance_method(name)]
    end
  end.uniq
  current_filename = nil
  tests = {}
  methods.each do |name, meth|
    next unless loc = meth.source_location
    current_filename ||= loc[0]
    next unless current_filename == loc[0]
    tests[loc[1]] = name
  end
  _, main_test = tests.sort_by { |k, v| -k }.detect do |line, name|
    exp_line >= line
  end
  raise "Could not find test method after line #{exp_line}" unless main_test
  options[:filter] = main_test
end

def self.plugin_line_inject_reporter
end

def self.plugin_line_options(opts, options)
  opts.on '-l', '--line N', Integer, "Run test at line number" do |lineno|
    options[:line] = lineno
  end
end