module RSpec::Rails::MinitestAssertionAdapter::ClassMethods

def assertion_method_names
  methods = ::RSpec::Rails::Assertions.
    public_instance_methods.
    select do |m|
      m.to_s =~ /^(assert|flunk|refute)/
    end
  methods + test_unit_specific_methods
end

def define_assertion_delegators
  assertion_method_names.each do |m|
    define_method(m.to_sym) do |*args, &block|
      assertion_delegator.send(m.to_sym, *args, &block)
    end
  end
end

def test_unit_specific_methods
  []
end

def test_unit_specific_methods
  [:build_message]
end