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 // Copyright (c) 2018, 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. import "package:expect/expect.dart"; import 'dart:math' show pow; main() { // Test integers. testInt(0); for (int i = 0; i < 63; i++) { var n = pow(2, i); testInt(-n - 1); testInt(-n); testInt(-n + 1); testInt(n - 1); testInt(n); testInt(n + 1); } testInt(-0x8000000000000000); // Test doubles. testDouble(0.0); testDouble(-0.0, 0.0); for (double d in [ 1.0, 2.0, pow(2.0, 30) - 1, pow(2.0, 30), pow(2.0, 31) - 1, pow(2.0, 31), pow(2.0, 31) + 1, pow(2.0, 32) - 1, pow(2.0, 32), pow(2.0, 32) + 1, pow(2.0, 52) - 1, pow(2.0, 52), pow(2.0, 52) + 1, pow(2.0, 53) - 1, pow(2.0, 53), ]) { for (int p = 0; p < 1024; p++) { var value = d * pow(2.0, p); // Valid integer value. if (!value.isFinite) break; testDouble(-value); testDouble(value); } } Expect.equals(BigInt.zero, new BigInt.from(0.5)); Expect.equals(BigInt.one, new BigInt.from(1.5)); Expect.throws(() => new BigInt.from(double.infinity)); Expect.throws(() => new BigInt.from(-double.infinity)); Expect.throws(() => new BigInt.from(double.nan)); } testInt(int n) { var bigint = new BigInt.from(n); Expect.equals(n, bigint.toInt()); Expect.equals("\$n", "\$bigint"); } testDouble(double input, [double expectation]) { var bigint = new BigInt.from(input); Expect.equals(expectation ?? input, bigint.toDouble()); }