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dart / fixnum / e37bb487bbac7d8000c78602c38020200b48812e / . / test / int32_test.dart
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// 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.
import 'package:fixnum/fixnum.dart';
import 'package:test/test.dart';
void main() {
group("isX tests", () {
test("isEven", () {
expect((-Int32.ONE).isEven, false);
expect(Int32.ZERO.isEven, true);
expect(Int32.ONE.isEven, false);
expect(Int32.TWO.isEven, true);
});
test("isMaxValue", () {
expect(Int32.MIN_VALUE.isMaxValue, false);
expect(Int32.ZERO.isMaxValue, false);
expect(Int32.MAX_VALUE.isMaxValue, true);
});
test("isMinValue", () {
expect(Int32.MIN_VALUE.isMinValue, true);
expect(Int32.ZERO.isMinValue, false);
expect(Int32.MAX_VALUE.isMinValue, false);
});
test("isNegative", () {
expect(Int32.MIN_VALUE.isNegative, true);
expect(Int32.ZERO.isNegative, false);
expect(Int32.ONE.isNegative, false);
});
test("isOdd", () {
expect((-Int32.ONE).isOdd, true);
expect(Int32.ZERO.isOdd, false);
expect(Int32.ONE.isOdd, true);
expect(Int32.TWO.isOdd, false);
});
test("isZero", () {
expect(Int32.MIN_VALUE.isZero, false);
expect(Int32.ZERO.isZero, true);
expect(Int32.MAX_VALUE.isZero, false);
});
test("bitLength", () {
expect(Int32(-2).bitLength, 1);
expect((-Int32.ONE).bitLength, 0);
expect(Int32.ZERO.bitLength, 0);
expect(Int32.ONE.bitLength, 1);
expect(Int32(2).bitLength, 2);
expect(Int32.MAX_VALUE.bitLength, 31);
expect(Int32.MIN_VALUE.bitLength, 31);
});
});
group("arithmetic operators", () {
Int32 n1 = Int32(1234);
Int32 n2 = Int32(9876);
Int32 n3 = Int32(-1234);
Int32 n4 = Int32(-9876);
test("+", () {
expect(n1 + n2, Int32(11110));
expect(n3 + n2, Int32(8642));
expect(n3 + n4, Int32(-11110));
expect(n3 + Int64(1), Int64(-1233));
expect(Int32.MAX_VALUE + 1, Int32.MIN_VALUE);
expect(() => Int32(17) + null, throwsArgumentError);
});
test("-", () {
expect(n1 - n2, Int32(-8642));
expect(n3 - n2, Int32(-11110));
expect(n3 - n4, Int32(8642));
expect(n3 - Int64(1), Int64(-1235));
expect(Int32.MIN_VALUE - 1, Int32.MAX_VALUE);
expect(() => Int32(17) - null, throwsArgumentError);
});
test("unary -", () {
expect(-n1, Int32(-1234));
expect(-Int32.ZERO, Int32.ZERO);
});
test("*", () {
expect(n1 * n2, Int32(12186984));
expect(n2 * n3, Int32(-12186984));
expect(n3 * n3, Int32(1522756));
expect(n3 * n2, Int32(-12186984));
expect(Int32(0x12345678) * Int32(0x22222222), Int32(-899716112));
expect((Int32(123456789) * Int32(987654321)), Int32(-67153019));
expect(Int32(0x12345678) * Int64(0x22222222),
Int64.fromInts(0x026D60DC, 0xCA5F6BF0));
expect((Int32(123456789) * 987654321), Int32(-67153019));
expect(() => Int32(17) * null, throwsArgumentError);
});
test("~/", () {
expect(Int32(829893893) ~/ Int32(1919), Int32(432461));
expect(Int32(0x12345678) ~/ Int32(0x22), Int32(0x12345678 ~/ 0x22));
expect(Int32(829893893) ~/ Int64(1919), Int32(432461));
expect(Int32(0x12345678) ~/ Int64(0x22), Int32(0x12345678 ~/ 0x22));
expect(Int32(829893893) ~/ 1919, Int32(432461));
expect(
() => Int32(17) ~/ Int32.ZERO,
// with dart2js, `UnsupportedError` is thrown
// on the VM: IntegerDivisionByZeroException
throwsA(anyOf(const TypeMatcher<IntegerDivisionByZeroException>(),
isUnsupportedError)));
expect(() => Int32(17) ~/ null, throwsArgumentError);
});
test("%", () {
expect(Int32(0x12345678) % Int32(0x22), Int32(0x12345678 % 0x22));
expect(Int32(0x12345678) % Int64(0x22), Int32(0x12345678 % 0x22));
expect(() => Int32(17) % null, throwsArgumentError);
});
test("remainder", () {
expect(Int32(0x12345678).remainder(Int32(0x22)),
Int32(0x12345678.remainder(0x22)));
expect(Int32(0x12345678).remainder(Int32(-0x22)),
Int32(0x12345678.remainder(-0x22)));
expect(Int32(-0x12345678).remainder(Int32(-0x22)),
Int32(-0x12345678.remainder(-0x22)));
expect(Int32(-0x12345678).remainder(Int32(0x22)),
Int32(-0x12345678.remainder(0x22)));
expect(Int32(0x12345678).remainder(Int64(0x22)),
Int32(0x12345678.remainder(0x22)));
expect(() => Int32(17).remainder(null), throwsArgumentError);
});
test("abs", () {
// NOTE: Int32.MIN_VALUE.abs() is undefined
expect((Int32.MIN_VALUE + 1).abs(), Int32.MAX_VALUE);
expect(Int32(-1).abs(), Int32(1));
expect(Int32(0).abs(), Int32(0));
expect(Int32(1).abs(), Int32(1));
expect(Int32.MAX_VALUE.abs(), Int32.MAX_VALUE);
});
test("clamp", () {
Int32 val = Int32(17);
expect(val.clamp(20, 30), Int32(20));
expect(val.clamp(10, 20), Int32(17));
expect(val.clamp(10, 15), Int32(15));
expect(val.clamp(Int32(20), Int32(30)), Int32(20));
expect(val.clamp(Int32(10), Int32(20)), Int32(17));
expect(val.clamp(Int32(10), Int32(15)), Int32(15));
expect(val.clamp(Int64(20), Int64(30)), Int32(20));
expect(val.clamp(Int64(10), Int64(20)), Int32(17));
expect(val.clamp(Int64(10), Int64(15)), Int32(15));
expect(val.clamp(Int64.MIN_VALUE, Int64(30)), Int32(17));
expect(val.clamp(Int64(10), Int64.MAX_VALUE), Int32(17));
expect(() => val.clamp(30.5, 40.5), throwsArgumentError);
expect(() => val.clamp(5.5, 10.5), throwsArgumentError);
expect(() => val.clamp('a', 1), throwsArgumentError);
expect(() => val.clamp(1, 'b'), throwsArgumentError);
expect(() => val.clamp('a', 1), throwsArgumentError);
});
});
group("leading/trailing zeros", () {
test("numberOfLeadingZeros", () {
expect(Int32(0).numberOfLeadingZeros(), 32);
expect(Int32(1).numberOfLeadingZeros(), 31);
expect(Int32(0xffff).numberOfLeadingZeros(), 16);
expect(Int32(-1).numberOfLeadingZeros(), 0);
});
test("numberOfTrailingZeros", () {
expect(Int32(0).numberOfTrailingZeros(), 32);
expect(Int32(0x80000000).numberOfTrailingZeros(), 31);
expect(Int32(1).numberOfTrailingZeros(), 0);
expect(Int32(0x10000).numberOfTrailingZeros(), 16);
});
});
group("comparison operators", () {
test("compareTo", () {
expect(Int32(0).compareTo(-1), 1);
expect(Int32(0).compareTo(0), 0);
expect(Int32(0).compareTo(1), -1);
expect(Int32(0).compareTo(Int32(-1)), 1);
expect(Int32(0).compareTo(Int32(0)), 0);
expect(Int32(0).compareTo(Int32(1)), -1);
expect(Int32(0).compareTo(Int64(-1)), 1);
expect(Int32(0).compareTo(Int64(0)), 0);
expect(Int32(0).compareTo(Int64(1)), -1);
});
test("<", () {
expect(Int32(17) < Int32(18), true);
expect(Int32(17) < Int32(17), false);
expect(Int32(17) < Int32(16), false);
expect(Int32(17) < Int64(18), true);
expect(Int32(17) < Int64(17), false);
expect(Int32(17) < Int64(16), false);
expect(Int32.MIN_VALUE < Int32.MAX_VALUE, true);
expect(Int32.MAX_VALUE < Int32.MIN_VALUE, false);
expect(() => Int32(17) < null, throwsArgumentError);
});
test("<=", () {
expect(Int32(17) <= Int32(18), true);
expect(Int32(17) <= Int32(17), true);
expect(Int32(17) <= Int32(16), false);
expect(Int32(17) <= Int64(18), true);
expect(Int32(17) <= Int64(17), true);
expect(Int32(17) <= Int64(16), false);
expect(Int32.MIN_VALUE <= Int32.MAX_VALUE, true);
expect(Int32.MAX_VALUE <= Int32.MIN_VALUE, false);
expect(() => Int32(17) <= null, throwsArgumentError);
});
test("==", () {
expect(Int32(17), isNot(equals(Int32(18))));
expect(Int32(17), equals(Int32(17)));
expect(Int32(17), isNot(equals(Int32(16))));
expect(Int32(17), isNot(equals(Int64(18))));
expect(Int32(17), equals(Int64(17)));
expect(Int32(17), isNot(equals(Int64(16))));
expect(Int32.MIN_VALUE, isNot(equals(Int32.MAX_VALUE)));
expect(Int32(17), isNot(equals(18)));
expect(Int32(17) == 17, isTrue);
expect(Int32(17), isNot(equals(16)));
expect(Int32(17), isNot(equals(Object())));
expect(Int32(17), isNot(equals(null)));
});
test(">=", () {
expect(Int32(17) >= Int32(18), false);
expect(Int32(17) >= Int32(17), true);
expect(Int32(17) >= Int32(16), true);
expect(Int32(17) >= Int64(18), false);
expect(Int32(17) >= Int64(17), true);
expect(Int32(17) >= Int64(16), true);
expect(Int32.MIN_VALUE >= Int32.MAX_VALUE, false);
expect(Int32.MAX_VALUE >= Int32.MIN_VALUE, true);
expect(() => Int32(17) >= null, throwsArgumentError);
});
test(">", () {
expect(Int32(17) > Int32(18), false);
expect(Int32(17) > Int32(17), false);
expect(Int32(17) > Int32(16), true);
expect(Int32(17) > Int64(18), false);
expect(Int32(17) > Int64(17), false);
expect(Int32(17) > Int64(16), true);
expect(Int32.MIN_VALUE > Int32.MAX_VALUE, false);
expect(Int32.MAX_VALUE > Int32.MIN_VALUE, true);
expect(() => Int32(17) > null, throwsArgumentError);
});
});
group("bitwise operators", () {
test("&", () {
expect(Int32(0x12345678) & Int32(0x22222222),
Int32(0x12345678 & 0x22222222));
expect(Int32(0x12345678) & Int64(0x22222222),
Int64(0x12345678 & 0x22222222));
expect(() => Int32(17) & null, throwsArgumentError);
});
test("|", () {
expect(Int32(0x12345678) | Int32(0x22222222),
Int32(0x12345678 | 0x22222222));
expect(Int32(0x12345678) | Int64(0x22222222),
Int64(0x12345678 | 0x22222222));
expect(() => Int32(17) | null, throwsArgumentError);
});
test("^", () {
expect(Int32(0x12345678) ^ Int32(0x22222222),
Int32(0x12345678 ^ 0x22222222));
expect(Int32(0x12345678) ^ Int64(0x22222222),
Int64(0x12345678 ^ 0x22222222));
expect(() => Int32(17) ^ null, throwsArgumentError);
});
test("~", () {
expect(~(Int32(0x12345678)), Int32(~0x12345678));
expect(-(Int32(0x12345678)), Int64(-0x12345678));
});
});
group("bitshift operators", () {
test("<<", () {
expect(Int32(0x12345678) << 7, Int32(0x12345678 << 7));
expect(Int32(0x12345678) << 32, Int32.ZERO);
expect(Int32(0x12345678) << 33, Int32.ZERO);
expect(() => Int32(17) << -1, throwsArgumentError);
expect(() => Int32(17) << null, throwsNoSuchMethodError);
});
test(">>", () {
expect(Int32(0x12345678) >> 7, Int32(0x12345678 >> 7));
expect(Int32(0x12345678) >> 32, Int32.ZERO);
expect(Int32(0x12345678) >> 33, Int32.ZERO);
expect(Int32(-42) >> 32, Int32(-1));
expect(Int32(-42) >> 33, Int32(-1));
expect(() => Int32(17) >> -1, throwsArgumentError);
expect(() => Int32(17) >> null, throwsNoSuchMethodError);
});
test("shiftRightUnsigned", () {
expect(Int32(0x12345678).shiftRightUnsigned(7), Int32(0x12345678 >> 7));
expect(Int32(0x12345678).shiftRightUnsigned(32), Int32.ZERO);
expect(Int32(0x12345678).shiftRightUnsigned(33), Int32.ZERO);
expect(Int32(-42).shiftRightUnsigned(32), Int32.ZERO);
expect(Int32(-42).shiftRightUnsigned(33), Int32.ZERO);
expect(() => (Int32(17).shiftRightUnsigned(-1)), throwsArgumentError);
expect(
() => (Int32(17).shiftRightUnsigned(null)), throwsNoSuchMethodError);
});
});
group("conversions", () {
test("toSigned", () {
expect(Int32.ONE.toSigned(2), Int32.ONE);
expect(Int32.ONE.toSigned(1), -Int32.ONE);
expect(Int32.MAX_VALUE.toSigned(32), Int32.MAX_VALUE);
expect(Int32.MIN_VALUE.toSigned(32), Int32.MIN_VALUE);
expect(Int32.MAX_VALUE.toSigned(31), -Int32.ONE);
expect(Int32.MIN_VALUE.toSigned(31), Int32.ZERO);
expect(() => Int32.ONE.toSigned(0), throwsRangeError);
expect(() => Int32.ONE.toSigned(33), throwsRangeError);
});
test("toUnsigned", () {
expect(Int32.ONE.toUnsigned(1), Int32.ONE);
expect(Int32.ONE.toUnsigned(0), Int32.ZERO);
expect(Int32.MAX_VALUE.toUnsigned(32), Int32.MAX_VALUE);
expect(Int32.MIN_VALUE.toUnsigned(32), Int32.MIN_VALUE);
expect(Int32.MAX_VALUE.toUnsigned(31), Int32.MAX_VALUE);
expect(Int32.MIN_VALUE.toUnsigned(31), Int32.ZERO);
expect(() => Int32.ONE.toUnsigned(-1), throwsRangeError);
expect(() => Int32.ONE.toUnsigned(33), throwsRangeError);
});
test("toDouble", () {
expect(Int32(17).toDouble(), same(17.0));
expect(Int32(-17).toDouble(), same(-17.0));
});
test("toInt", () {
expect(Int32(17).toInt(), 17);
expect(Int32(-17).toInt(), -17);
});
test("toInt32", () {
expect(Int32(17).toInt32(), Int32(17));
expect(Int32(-17).toInt32(), Int32(-17));
});
test("toInt64", () {
expect(Int32(17).toInt64(), Int64(17));
expect(Int32(-17).toInt64(), Int64(-17));
});
test("toBytes", () {
expect(Int32(0).toBytes(), [0, 0, 0, 0]);
expect(Int32(0x01020304).toBytes(), [4, 3, 2, 1]);
expect(Int32(0x04030201).toBytes(), [1, 2, 3, 4]);
expect(Int32(-1).toBytes(), [0xff, 0xff, 0xff, 0xff]);
});
});
group("parse", () {
test("base 10", () {
checkInt(int x) {
expect(Int32.parseRadix('$x', 10), Int32(x));
}
checkInt(0);
checkInt(1);
checkInt(1000);
checkInt(12345678);
checkInt(2147483647);
checkInt(2147483648);
checkInt(4294967295);
checkInt(4294967296);
expect(() => Int32.parseRadix('xyzzy', -1), throwsArgumentError);
expect(() => Int32.parseRadix('plugh', 10), throwsFormatException);
});
test("parseRadix", () {
check(String s, int r, String x) {
expect(Int32.parseRadix(s, r).toString(), x);
}
check('deadbeef', 16, '-559038737');
check('95', 12, '113');
});
test("parseInt", () {
expect(Int32.parseInt('0'), Int32(0));
expect(Int32.parseInt('1000'), Int32(1000));
expect(Int32.parseInt('4294967296'), Int32(4294967296));
});
test("parseHex", () {
expect(Int32.parseHex('deadbeef'), Int32(0xdeadbeef));
expect(Int32.parseHex('cafebabe'), Int32(0xcafebabe));
expect(Int32.parseHex('8badf00d'), Int32(0x8badf00d));
});
});
group("string representation", () {
test("toString", () {
expect(Int32(0).toString(), "0");
expect(Int32(1).toString(), "1");
expect(Int32(-1).toString(), "-1");
expect(Int32(1000).toString(), "1000");
expect(Int32(-1000).toString(), "-1000");
expect(Int32(123456789).toString(), "123456789");
expect(Int32(2147483647).toString(), "2147483647");
expect(Int32(2147483648).toString(), "-2147483648");
expect(Int32(2147483649).toString(), "-2147483647");
expect(Int32(2147483650).toString(), "-2147483646");
expect(Int32(-2147483648).toString(), "-2147483648");
expect(Int32(-2147483649).toString(), "2147483647");
expect(Int32(-2147483650).toString(), "2147483646");
});
});
group("toHexString", () {
test("returns hexadecimal string representation", () {
expect(Int32(-1).toHexString(), "-1");
expect((Int32(-1) >> 8).toHexString(), "-1");
expect((Int32(-1) << 8).toHexString(), "-100");
expect(Int32(123456789).toHexString(), "75bcd15");
expect(Int32(-1).shiftRightUnsigned(8).toHexString(), "ffffff");
});
});
group("toRadixString", () {
test("returns base n string representation", () {
expect(Int32(123456789).toRadixString(5), "223101104124");
});
});
}