Bob Nystrom
edee53f93d
What is dead may never die. Change-Id: I80ef766b8ce2b6e1416df8e1f9b91fb74169dc79 Reviewed-on: https://dart-review.googlesource.com/7483 Reviewed-by: William Hesse <whesse@google.com>
91 lines
3.6 KiB
Dart
91 lines
3.6 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "package:expect/expect.dart";
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// Dart test program for testing NaN and Infinity.
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void main() {
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// Sanity tests.
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Expect.isFalse(1.5.isNaN);
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Expect.isFalse(1.5.isInfinite);
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Expect.isTrue(1.5.isFinite);
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Expect.isFalse(1.5.isNegative);
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Expect.isTrue((-1.5).isNegative);
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Expect.isFalse(0.0.isNegative);
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Expect.isTrue((-0.0).isNegative);
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Expect.isTrue((-0.0).isFinite);
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Expect.isFalse(1.isNaN);
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Expect.isFalse(1.isInfinite);
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Expect.isTrue(1.isFinite);
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Expect.isFalse(1.isNegative);
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Expect.isTrue((-1).isNegative);
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// Test that predicates give the correct result.
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Expect.isTrue(double.NAN.isNaN);
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Expect.isFalse(double.NAN.isInfinite);
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Expect.isFalse(double.NAN.isFinite);
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Expect.isFalse(double.NAN.isNegative);
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Expect.isFalse((-double.NAN).isNegative);
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Expect.isFalse(double.INFINITY.isNaN);
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Expect.isTrue(double.INFINITY.isInfinite);
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Expect.isFalse(double.INFINITY.isFinite);
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Expect.isFalse(double.INFINITY.isNegative);
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Expect.isTrue((-double.INFINITY).isNegative);
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Expect.isFalse(double.NEGATIVE_INFINITY.isNaN);
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Expect.isTrue(double.NEGATIVE_INFINITY.isInfinite);
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Expect.isFalse(double.NEGATIVE_INFINITY.isFinite);
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Expect.isTrue(double.NEGATIVE_INFINITY.isNegative);
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Expect.isFalse((-double.NEGATIVE_INFINITY).isNegative);
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// Test toString.
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Expect.equals("NaN", double.NAN.toString());
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Expect.equals("Infinity", double.INFINITY.toString());
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Expect.equals("-Infinity", double.NEGATIVE_INFINITY.toString());
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// Test identities.
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Expect.isTrue(identical(double.NAN, double.NAN)); // //# 01: ok
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Expect.isTrue(identical(double.INFINITY, double.INFINITY));
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Expect.isTrue(identical(double.NEGATIVE_INFINITY, double.NEGATIVE_INFINITY));
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Expect.isFalse(identical(double.NAN, double.INFINITY));
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Expect.isFalse(identical(double.NAN, double.NEGATIVE_INFINITY));
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Expect.isFalse(identical(double.INFINITY, double.NEGATIVE_INFINITY));
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Expect.isFalse(identical(double.NAN, -double.NAN));
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Expect.isTrue(identical(double.INFINITY, -double.NEGATIVE_INFINITY));
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Expect.isTrue(identical(double.NEGATIVE_INFINITY, -double.INFINITY));
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// Test equalities
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Expect.isTrue(double.INFINITY == double.INFINITY);
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Expect.isTrue(double.NEGATIVE_INFINITY == double.NEGATIVE_INFINITY);
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Expect.isFalse(double.INFINITY == double.NEGATIVE_INFINITY);
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Expect.isFalse(double.NEGATIVE_INFINITY == double.INFINITY);
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Expect.isFalse(double.NAN == double.NAN);
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Expect.isFalse(double.NAN == double.INFINITY);
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Expect.isFalse(double.NAN == double.NEGATIVE_INFINITY);
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Expect.isFalse(double.INFINITY == double.NAN);
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Expect.isFalse(double.NEGATIVE_INFINITY == double.NAN);
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// Test relational order.
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Expect.isFalse(double.NAN < double.NAN);
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Expect.isFalse(double.NAN < double.INFINITY);
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Expect.isFalse(double.NAN < double.NEGATIVE_INFINITY);
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Expect.isFalse(double.NAN > double.NAN);
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Expect.isFalse(double.NAN > double.INFINITY);
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Expect.isFalse(double.NAN > double.NEGATIVE_INFINITY);
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Expect.isFalse(double.INFINITY < double.NAN);
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Expect.isFalse(double.NEGATIVE_INFINITY < double.NAN);
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Expect.isFalse(double.INFINITY > double.NAN);
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Expect.isFalse(double.NEGATIVE_INFINITY > double.NAN);
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Expect.isTrue(double.INFINITY > double.NEGATIVE_INFINITY);
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Expect.isFalse(double.INFINITY < double.NEGATIVE_INFINITY);
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// NaN is contagious.
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Expect.isTrue((3.0 * double.NAN).isNaN);
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Expect.isTrue((3.0 + double.NAN).isNaN);
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Expect.isTrue((-double.NAN).isNaN);
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}
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