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![Robert Nystrom](/assets/img/avatar_default.png)
Change-Id: I764d0457da85b2935e1d83309eab4c4b5b3ea000 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/126204 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
85 lines
3 KiB
Dart
85 lines
3 KiB
Dart
// Copyright (c) 2012, 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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main() {
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/// Test that converting [value] to a string gives [expect].
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/// Also test that `-value` gives `"-"+expect`.
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test(int value, String expect) {
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Expect.equals(expect, value.toString());
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Expect.equals(expect, "$value");
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Expect.equals(expect, (new StringBuffer()..write(value)).toString());
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if (value <= 0) return;
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expect = "-$expect";
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value = -value;
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Expect.equals(expect, value.toString());
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Expect.equals(expect, "$value");
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Expect.equals(expect, (new StringBuffer()..write(value)).toString());
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}
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// Very simple tests.
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test(0, "0");
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test(1, "1");
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test(2, "2");
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test(5, "5");
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// Binary special cases.
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// ~2^30.
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test(0x3fffffff, "1073741823");
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test(0x40000000, "1073741824");
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test(0x40000001, "1073741825");
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// ~2^31.
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test(0x7fffffff, "2147483647");
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test(0x80000000, "2147483648");
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test(0x80000001, "2147483649");
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// ~2^32.
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test(0xffffffff, "4294967295");
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test(0x100000000, "4294967296");
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test(0x100000001, "4294967297");
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// ~2^51.
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test(0x7ffffffffffff, "2251799813685247");
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test(0x8000000000000, "2251799813685248");
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test(0x8000000000001, "2251799813685249");
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// ~2^52.
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test(0xfffffffffffff, "4503599627370495");
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test(0x10000000000000, "4503599627370496");
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test(0x10000000000001, "4503599627370497");
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// ~2^53.
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test(0x1fffffffffffff, "9007199254740991");
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test(0x20000000000000, "9007199254740992");
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test(0x20000000000001, "9007199254740993"); // //# 01: ok
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// ~2^62.
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test(0x3fffffffffffffff, "4611686018427387903"); // //# 01: continued
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test(0x4000000000000000, "4611686018427387904"); // //# 01: continued
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test(0x4000000000000001, "4611686018427387905"); // //# 01: continued
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// ~2^63.
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test(0x7fffffffffffffff, "9223372036854775807"); // //# 01: continued
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test(0x8000000000000000, "-9223372036854775808"); // //# 01: continued
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test(0x8000000000000001, "-9223372036854775807"); // //# 01: continued
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// ~2^64.
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test(0xffffffffffffffff, "-1"); // //# 01: continued
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// Decimal special cases.
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int number = 10;
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// Numbers 99..99, 100...00, and 100..01 up to 18 digits.
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for (int i = 1; i < 15; i++) {
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// Works in dart2js up to 10^15.
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test(number - 1, "9" * i);
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test(number, "1" + "0" * i);
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test(number + 1, "1" + "0" * (i - 1) + "1");
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number *= 10;
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}
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// Fails to represent exactly in dart2js.
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for (int i = 15; i < 19; i++) { // //# 01: continued
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test(number - 1, "9" * i); // //# 01: continued
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test(number, "1" + "0" * i); // //# 01: continued
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test(number + 1, "1" + "0" * (i - 1) + "1"); // //# 01: continued
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number *= 10; // //# 01: continued
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} // //# 01: continued
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}
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