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02a8b015ad
Change-Id: I1783f624c7ce7d3b962c301c27ac0f4422d7c28f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/126824 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@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.negativeInfinity.isNaN);
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Expect.isTrue(double.negativeInfinity.isInfinite);
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Expect.isFalse(double.negativeInfinity.isFinite);
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Expect.isTrue(double.negativeInfinity.isNegative);
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Expect.isFalse((-double.negativeInfinity).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.negativeInfinity.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.negativeInfinity, double.negativeInfinity));
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Expect.isFalse(identical(double.nan, double.infinity));
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Expect.isFalse(identical(double.nan, double.negativeInfinity));
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Expect.isFalse(identical(double.infinity, double.negativeInfinity));
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Expect.isFalse(identical(double.nan, -double.nan));
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Expect.isTrue(identical(double.infinity, -double.negativeInfinity));
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Expect.isTrue(identical(double.negativeInfinity, -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.negativeInfinity == double.negativeInfinity);
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Expect.isFalse(double.infinity == double.negativeInfinity);
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Expect.isFalse(double.negativeInfinity == 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.negativeInfinity);
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Expect.isFalse(double.infinity == double.nan);
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Expect.isFalse(double.negativeInfinity == 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.negativeInfinity);
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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.negativeInfinity);
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Expect.isFalse(double.infinity < double.nan);
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Expect.isFalse(double.negativeInfinity < double.nan);
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Expect.isFalse(double.infinity > double.nan);
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Expect.isFalse(double.negativeInfinity > double.nan);
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Expect.isTrue(double.infinity > double.negativeInfinity);
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Expect.isFalse(double.infinity < double.negativeInfinity);
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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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