class Minitest::Reporters::HtmlReporter

def initialize(args = {})

:output_filename - the report's filename, defaults to 'index.html'
:mode - Useful for debugging, :terse suppresses errors and is the default, :verbose lets errors bubble up
:erb_template - the path to a custom ERB template, defaults to the supplied ERB template
:reports_dir - the directory the reports should be written to, defaults to 'test/html_reports'
:title - the title that will be used in the report, defaults to 'Test Results'
The constructor takes a hash, and uses the following keys: 
def initialize(args = {})
  super({})
  defaults = {
    :title           => 'Test Results',
    :erb_template    => "#{File.dirname(__FILE__)}/../templates/index.html.erb",
    :reports_dir     => ENV['MINITEST_HTML_REPORTS_DIR'] || 'test/html_reports',
    :mode            => :safe,
    :output_filename => ENV['MINITEST_HTML_REPORTS_FILENAME'] || 'index.html',
  }
  settings = defaults.merge(args)
  @mode = settings[:mode]
  @title = settings[:title]
  @erb_template = settings[:erb_template]
  @output_filename = settings[:output_filename]
  reports_dir = settings[:reports_dir]
  @reports_path = File.absolute_path(reports_dir)
end