dart-sdk/tests/language/number_identity_test.dart

44 lines
1.1 KiB
Dart

// Copyright (c) 2012, 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.
// Dart test program for testing params.
import "package:expect/expect.dart";
main() {
for (int i = 0; i < 1000; i++) testNumberIdentity();
}
testNumberIdentity () {
const int smi = 8;
const int mint = 9223372036854775806;
const int bigint = 22107138293752210713829375;
const double dbl = 8.0;
var a = smi;
var b = a + 0;
Expect.isTrue(identical(a, b));
Expect.isFalse(identical(b, mint));
Expect.isFalse(identical(b, bigint));
a = mint;
b = a + 0;
Expect.isTrue(identical(a, b));
Expect.isFalse(identical(b, smi));
Expect.isFalse(identical(b, bigint));
Expect.isFalse(identical(b, dbl));
a = bigint;
b = a + 0;
Expect.isTrue(identical(a, b));
Expect.isFalse(identical(b, smi));
Expect.isFalse(identical(b, mint));
Expect.isFalse(identical(b, dbl));
a = dbl;
b = a + 0.0;
Expect.isTrue(identical(a, b));
Expect.isFalse(identical(b, mint));
Expect.isFalse(identical(b, bigint));
}