LibTest/core/double/toStringAsFixed_A03_t01.dart

// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion String toStringAsFixed(int fractionDigits)
/// Returns a decimal-point string-representation of this.
///...
/// If the absolute value of this is greater or equal to 10^21 then this methods
/// returns an exponential representation computed by
/// this.toStringAsExponential(). Otherwise the result is the closest string
/// representation with exactly fractionDigits digits after the decimal point
/// @description Checks that If the absolute value of this is greater or equal
/// to 10^21 then this methods returns an exponential representation computed by
/// this.toStringAsExponential().
/// @author sgrekhov@unipro.ru

import "../../../Utils/expect.dart";
import "dart:math";

main() {
  double x1 = pow(10.0, 21) as double;
  Expect.equals("1e+21", x1.toStringAsFixed(0));
  Expect.equals("1e+21", x1.toStringAsFixed(10));
  Expect.equals("1e+21", x1.toStringAsFixed(20));

  double y1 = pow(10.0, 20) as double;
  Expect.equals("100000000000000000000", y1.toStringAsFixed(0));
  Expect.equals("100000000000000000000.0000000000", y1.toStringAsFixed(10));
  Expect.equals(
      "100000000000000000000.00000000000000000000", y1.toStringAsFixed(20));
}