# File test/unit/assertions.rb, line 352

                        def assert_in_delta(expected_float, actual_float, delta, message="")

                                _wrap_assertion {

                                        {expected_float => "first float", actual_float => "second float", delta => "delta"}.each {

                                                |float, name|

                                                assert_respond_to(float, :to_f, "The arguments must respond to to_f; the #{name} did not")

                                        }

                                        assert_operator(delta, :>=, 0.0, "The delta should not be negative")

                                        full_message = build_message(message, expected_float, actual_float, delta) {

                                                |arg1, arg2, arg3|

                                                "<#{arg1}> and\n" +

                                                "<#{arg2}> expected to be within\n" +

                                                "<#{arg3}> of each other"

                                        }

                                        assert_block(full_message) {

                                                (expected_float.to_f - actual_float.to_f).abs <= delta.to_f

                                        }

                                }

                        end