# File test/unit/assertions.rb, line 313
   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:to_f, "The arguments must respond to to_f; the #{name} did not")
					}
					full_message = build_message(message, expected_float, actual_float, delta) {
						|arg1, arg2, arg3|
						"Expected <#{arg1}> and <#{arg2}> to be within <#{arg3}> of each other"
					}
					assert_block(full_message) {
						(expected_float - actual_float).abs < delta.abs
					}
				}
			end