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TestDecimal.swift
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// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
class TestDecimal: XCTestCase {
func test_NSDecimalNumberInit() {
XCTAssertEqual(NSDecimalNumber(mantissa: 123456789000, exponent: -2, isNegative: true), -1234567890)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal()).decimalValue, Decimal(0))
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).intValue, 1)
XCTAssertEqual(NSDecimalNumber(string: "1.234").floatValue, 1.234)
XCTAssertTrue(NSDecimalNumber(string: "invalid").decimalValue.isNaN)
XCTAssertEqual(NSDecimalNumber(value: true).boolValue, true)
XCTAssertEqual(NSDecimalNumber(value: false).boolValue, false)
XCTAssertEqual(NSDecimalNumber(value: Int.min).intValue, Int.min)
XCTAssertEqual(NSDecimalNumber(value: UInt.min).uintValue, UInt.min)
XCTAssertEqual(NSDecimalNumber(value: Int8.min).int8Value, Int8.min)
XCTAssertEqual(NSDecimalNumber(value: UInt8.min).uint8Value, UInt8.min)
XCTAssertEqual(NSDecimalNumber(value: Int16.min).int16Value, Int16.min)
XCTAssertEqual(NSDecimalNumber(value: UInt16.min).uint16Value, UInt16.min)
XCTAssertEqual(NSDecimalNumber(value: Int32.min).int32Value, Int32.min)
XCTAssertEqual(NSDecimalNumber(value: UInt32.min).uint32Value, UInt32.min)
XCTAssertEqual(NSDecimalNumber(value: Int64.min).int64Value, Int64.min)
XCTAssertEqual(NSDecimalNumber(value: UInt64.min).uint64Value, UInt64.min)
XCTAssertEqual(NSDecimalNumber(value: Float.leastNormalMagnitude).floatValue, Float.leastNormalMagnitude)
XCTAssertEqual(NSDecimalNumber(value: Float.greatestFiniteMagnitude).floatValue, Float.greatestFiniteMagnitude)
XCTAssertEqual(NSDecimalNumber(value: Double.pi).doubleValue, Double.pi)
XCTAssertEqual(NSDecimalNumber(integerLiteral: 0).intValue, 0)
XCTAssertEqual(NSDecimalNumber(floatLiteral: Double.pi).doubleValue, Double.pi)
XCTAssertEqual(NSDecimalNumber(booleanLiteral: true).boolValue, true)
XCTAssertEqual(NSDecimalNumber(booleanLiteral: false).boolValue, false)
}
func test_AdditionWithNormalization() {
let biggie = Decimal(65536)
let smallee = Decimal(65536)
let answer = biggie/smallee
XCTAssertEqual(Decimal(1),answer)
var one = Decimal(1)
var addend = Decimal(1)
var expected = Decimal()
var result = Decimal()
expected._isNegative = 0;
expected._isCompact = 0;
// 2 digits -- certain to work
addend._exponent = -1;
XCTAssertEqual(.noError, NSDecimalAdd(&result, &one, &addend, .plain), "1 + 0.1")
expected._exponent = -1;
expected._length = 1;
expected._mantissa.0 = 11;
XCTAssertEqual(.orderedSame, NSDecimalCompare(&expected, &result), "1.1 == 1 + 0.1")
// 38 digits -- guaranteed by NSDecimal to work
addend._exponent = -37;
XCTAssertEqual(.noError, NSDecimalAdd(&result, &one, &addend, .plain), "1 + 1e-37")
expected._exponent = -37;
expected._length = 8;
expected._mantissa.0 = 0x0001;
expected._mantissa.1 = 0x0000;
expected._mantissa.2 = 0x36a0;
expected._mantissa.3 = 0x00f4;
expected._mantissa.4 = 0x46d9;
expected._mantissa.5 = 0xd5da;
expected._mantissa.6 = 0xee10;
expected._mantissa.7 = 0x0785;
XCTAssertEqual(.orderedSame, NSDecimalCompare(&expected, &result), "1 + 1e-37")
// 39 digits -- not guaranteed to work but it happens to, so we make the test work either way
addend._exponent = -38;
let error = NSDecimalAdd(&result, &one, &addend, .plain)
XCTAssertTrue(error == .noError || error == .lossOfPrecision, "1 + 1e-38")
if error == .noError {
expected._exponent = -38;
expected._length = 8;
expected._mantissa.0 = 0x0001;
expected._mantissa.1 = 0x0000;
expected._mantissa.2 = 0x2240;
expected._mantissa.3 = 0x098a;
expected._mantissa.4 = 0xc47a;
expected._mantissa.5 = 0x5a86;
expected._mantissa.6 = 0x4ca8;
expected._mantissa.7 = 0x4b3b;
XCTAssertEqual(.orderedSame, NSDecimalCompare(&expected, &result), "1 + 1e-38")
} else {
XCTAssertEqual(.orderedSame, NSDecimalCompare(&one, &result), "1 + 1e-38")
}
// 40 digits -- doesn't work; need to make sure it's rounding for us
addend._exponent = -39;
XCTAssertEqual(.lossOfPrecision, NSDecimalAdd(&result, &one, &addend, .plain), "1 + 1e-39")
XCTAssertEqual("1", result.description)
XCTAssertEqual(.orderedSame, NSDecimalCompare(&one, &result), "1 + 1e-39")
}
func test_BasicConstruction() {
let zero = Decimal()
XCTAssertEqual(20, MemoryLayout<Decimal>.size)
XCTAssertEqual(0, zero._exponent)
XCTAssertEqual(0, zero._length)
XCTAssertEqual(0, zero._isNegative)
XCTAssertEqual(0, zero._isCompact)
XCTAssertEqual(0, zero._reserved)
let (m0, m1, m2, m3, m4, m5, m6, m7) = zero._mantissa
XCTAssertEqual(0, m0)
XCTAssertEqual(0, m1)
XCTAssertEqual(0, m2)
XCTAssertEqual(0, m3)
XCTAssertEqual(0, m4)
XCTAssertEqual(0, m5)
XCTAssertEqual(0, m6)
XCTAssertEqual(0, m7)
XCTAssertEqual(8, NSDecimalMaxSize)
XCTAssertEqual(32767, NSDecimalNoScale)
XCTAssertFalse(zero.isNormal)
XCTAssertTrue(zero.isFinite)
XCTAssertTrue(zero.isZero)
XCTAssertFalse(zero.isSubnormal)
XCTAssertFalse(zero.isInfinite)
XCTAssertFalse(zero.isNaN)
XCTAssertFalse(zero.isSignaling)
let d1 = Decimal(1234567890123456789 as UInt64)
XCTAssertEqual(d1._exponent, 0)
XCTAssertEqual(d1._length, 4)
}
func test_Constants() {
XCTAssertEqual(8, NSDecimalMaxSize)
XCTAssertEqual(32767, NSDecimalNoScale)
let smallest = Decimal(_exponent: 127, _length: 8, _isNegative: 1, _isCompact: 1, _reserved: 0, _mantissa: (UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max))
XCTAssertEqual(smallest, Decimal.leastFiniteMagnitude)
let biggest = Decimal(_exponent: 127, _length: 8, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max, UInt16.max))
XCTAssertEqual(biggest, Decimal.greatestFiniteMagnitude)
let leastNormal = Decimal(_exponent: -127, _length: 1, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (1, 0, 0, 0, 0, 0, 0, 0))
XCTAssertEqual(leastNormal, Decimal.leastNormalMagnitude)
let leastNonzero = Decimal(_exponent: -127, _length: 1, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (1, 0, 0, 0, 0, 0, 0, 0))
XCTAssertEqual(leastNonzero, Decimal.leastNonzeroMagnitude)
let pi = Decimal(_exponent: -38, _length: 8, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (0x6623, 0x7d57, 0x16e7, 0xad0d, 0xaf52, 0x4641, 0xdfa7, 0xec58))
XCTAssertEqual(pi, Decimal.pi)
XCTAssertEqual(10, Decimal.radix)
XCTAssertTrue(Decimal().isCanonical)
XCTAssertFalse(Decimal().isSignalingNaN)
XCTAssertFalse(Decimal.nan.isSignalingNaN)
XCTAssertTrue(Decimal.nan.isNaN)
XCTAssertEqual(.quietNaN, Decimal.nan.floatingPointClass)
XCTAssertEqual(.positiveZero, Decimal().floatingPointClass)
XCTAssertEqual(.negativeNormal, smallest.floatingPointClass)
XCTAssertEqual(.positiveNormal, biggest.floatingPointClass)
XCTAssertFalse(Double.nan.isFinite)
XCTAssertFalse(Double.nan.isInfinite)
}
func test_Description() {
XCTAssertEqual("0", Decimal().description)
XCTAssertEqual("0", Decimal(0).description)
XCTAssertEqual("10", Decimal(_exponent: 1, _length: 1, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (1, 0, 0, 0, 0, 0, 0, 0)).description)
XCTAssertEqual("10", Decimal(10).description)
XCTAssertEqual("123.458", Decimal(_exponent: -3, _length: 2, _isNegative: 0, _isCompact:1, _reserved: 0, _mantissa: (57922, 1, 0, 0, 0, 0, 0, 0)).description)
XCTAssertEqual("123.458", Decimal(123.458).description)
XCTAssertEqual("123", Decimal(UInt8(123)).description)
XCTAssertEqual("45", Decimal(Int8(45)).description)
XCTAssertEqual("3.14159265358979323846264338327950288419", Decimal.pi.description)
XCTAssertEqual("-30000000000", Decimal(sign: .minus, exponent: 10, significand: Decimal(3)).description)
XCTAssertEqual("300000", Decimal(sign: .plus, exponent: 5, significand: Decimal(3)).description)
XCTAssertEqual("5", Decimal(signOf: Decimal(3), magnitudeOf: Decimal(5)).description)
XCTAssertEqual("-5", Decimal(signOf: Decimal(-3), magnitudeOf: Decimal(5)).description)
XCTAssertEqual("5", Decimal(signOf: Decimal(3), magnitudeOf: Decimal(-5)).description)
XCTAssertEqual("-5", Decimal(signOf: Decimal(-3), magnitudeOf: Decimal(-5)).description)
XCTAssertEqual("5", NSDecimalNumber(decimal: Decimal(5)).description)
XCTAssertEqual("-5", NSDecimalNumber(decimal: Decimal(-5)).description)
XCTAssertEqual("-3402823669209384634633746074317682114550000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", Decimal.leastFiniteMagnitude.description)
XCTAssertEqual("3402823669209384634633746074317682114550000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", Decimal.greatestFiniteMagnitude.description)
XCTAssertEqual("0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", Decimal.leastNormalMagnitude.description)
XCTAssertEqual("0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", Decimal.leastNonzeroMagnitude.description)
let fr = Locale(identifier: "fr_FR")
let leastFiniteMagnitude = "-3402823669209384634633746074317682114550000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
let greatestFiniteMagnitude = "3402823669209384634633746074317682114550000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
XCTAssertEqual("0", NSDecimalNumber(decimal: Decimal()).description(withLocale: fr))
XCTAssertEqual("1000", NSDecimalNumber(decimal: Decimal(1000)).description(withLocale: fr))
XCTAssertEqual("10", NSDecimalNumber(decimal: Decimal(10)).description(withLocale: fr))
XCTAssertEqual("123,458", NSDecimalNumber(decimal: Decimal(123.458)).description(withLocale: fr))
XCTAssertEqual("123", NSDecimalNumber(decimal: Decimal(UInt8(123))).description(withLocale: fr))
XCTAssertEqual("3,14159265358979323846264338327950288419", NSDecimalNumber(decimal: Decimal.pi).description(withLocale: fr))
XCTAssertEqual("-30000000000", NSDecimalNumber(decimal: Decimal(sign: .minus, exponent: 10, significand: Decimal(3))).description(withLocale: fr))
XCTAssertEqual("123456,789", NSDecimalNumber(decimal: Decimal(string: "123456.789")!).description(withLocale: fr))
XCTAssertEqual(leastFiniteMagnitude, NSDecimalNumber(decimal: Decimal.leastFiniteMagnitude).description(withLocale: fr))
XCTAssertEqual(greatestFiniteMagnitude, NSDecimalNumber(decimal: Decimal.greatestFiniteMagnitude).description(withLocale: fr))
XCTAssertEqual("0,0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", NSDecimalNumber(decimal: Decimal.leastNormalMagnitude).description(withLocale: fr))
XCTAssertEqual("0,0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", NSDecimalNumber(decimal: Decimal.leastNonzeroMagnitude).description(withLocale: fr))
let en = Locale(identifier: "en_GB")
XCTAssertEqual("0", NSDecimalNumber(decimal: Decimal()).description(withLocale: en))
XCTAssertEqual("1000", NSDecimalNumber(decimal: Decimal(1000)).description(withLocale: en))
XCTAssertEqual("10", NSDecimalNumber(decimal: Decimal(10)).description(withLocale: en))
XCTAssertEqual("123.458", NSDecimalNumber(decimal: Decimal(123.458)).description(withLocale: en))
XCTAssertEqual("123", NSDecimalNumber(decimal: Decimal(UInt8(123))).description(withLocale: en))
XCTAssertEqual("3.14159265358979323846264338327950288419", NSDecimalNumber(decimal: Decimal.pi).description(withLocale: en))
XCTAssertEqual("-30000000000", NSDecimalNumber(decimal: Decimal(sign: .minus, exponent: 10, significand: Decimal(3))).description(withLocale: en))
XCTAssertEqual("123456.789", NSDecimalNumber(decimal: Decimal(string: "123456.789")!).description(withLocale: en))
XCTAssertEqual(leastFiniteMagnitude, NSDecimalNumber(decimal: Decimal.leastFiniteMagnitude).description(withLocale: en))
XCTAssertEqual(greatestFiniteMagnitude, NSDecimalNumber(decimal: Decimal.greatestFiniteMagnitude).description(withLocale: en))
XCTAssertEqual("0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", NSDecimalNumber(decimal: Decimal.leastNormalMagnitude).description(withLocale: en))
XCTAssertEqual("0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001", NSDecimalNumber(decimal: Decimal.leastNonzeroMagnitude).description(withLocale: en))
}
func test_ExplicitConstruction() {
let reserved: UInt32 = (1<<18 as UInt32) + (1<<17 as UInt32) + 1
let mantissa: (UInt16, UInt16, UInt16, UInt16, UInt16, UInt16, UInt16, UInt16) = (6, 7, 8, 9, 10, 11, 12, 13)
var explicit = Decimal(
_exponent: 0x17f,
_length: 0xff,
_isNegative: 3,
_isCompact: 4,
_reserved: reserved,
_mantissa: mantissa
)
XCTAssertEqual(0x7f, explicit._exponent)
XCTAssertEqual(0x7f, explicit.exponent)
XCTAssertEqual(0x0f, explicit._length)
XCTAssertEqual(1, explicit._isNegative)
XCTAssertEqual(FloatingPointSign.minus, explicit.sign)
XCTAssertTrue(explicit.isSignMinus)
XCTAssertEqual(0, explicit._isCompact)
let i = 1 << 17 + 1
let expectedReserved: UInt32 = UInt32(i)
XCTAssertEqual(expectedReserved, explicit._reserved)
let (m0, m1, m2, m3, m4, m5, m6, m7) = explicit._mantissa
XCTAssertEqual(6, m0)
XCTAssertEqual(7, m1)
XCTAssertEqual(8, m2)
XCTAssertEqual(9, m3)
XCTAssertEqual(10, m4)
XCTAssertEqual(11, m5)
XCTAssertEqual(12, m6)
XCTAssertEqual(13, m7)
explicit._isCompact = 5
explicit._isNegative = 6
XCTAssertEqual(0, explicit._isNegative)
XCTAssertEqual(1, explicit._isCompact)
XCTAssertEqual(FloatingPointSign.plus, explicit.sign)
XCTAssertFalse(explicit.isSignMinus)
XCTAssertTrue(explicit.isNormal)
let significand = explicit.significand
XCTAssertEqual(0, significand._exponent)
XCTAssertEqual(0, significand.exponent)
XCTAssertEqual(0x0f, significand._length)
XCTAssertEqual(0, significand._isNegative)
XCTAssertEqual(1, significand._isCompact)
XCTAssertEqual(0, significand._reserved)
let (sm0, sm1, sm2, sm3, sm4, sm5, sm6, sm7) = significand._mantissa
XCTAssertEqual(6, sm0)
XCTAssertEqual(7, sm1)
XCTAssertEqual(8, sm2)
XCTAssertEqual(9, sm3)
XCTAssertEqual(10, sm4)
XCTAssertEqual(11, sm5)
XCTAssertEqual(12, sm6)
XCTAssertEqual(13, sm7)
let ulp = explicit.ulp
XCTAssertEqual(0x7f, ulp.exponent)
XCTAssertEqual(8, ulp._length)
XCTAssertEqual(0, ulp._isNegative)
XCTAssertEqual(1, ulp._isCompact)
XCTAssertEqual(0, ulp._reserved)
XCTAssertEqual(1, ulp._mantissa.0)
XCTAssertEqual(0, ulp._mantissa.1)
XCTAssertEqual(0, ulp._mantissa.2)
XCTAssertEqual(0, ulp._mantissa.3)
XCTAssertEqual(0, ulp._mantissa.4)
XCTAssertEqual(0, ulp._mantissa.5)
XCTAssertEqual(0, ulp._mantissa.6)
XCTAssertEqual(0, ulp._mantissa.7)
}
func test_Maths() {
for i in -2...10 {
for j in 0...5 {
XCTAssertEqual(Decimal(i*j), Decimal(i) * Decimal(j), "\(Decimal(i*j)) == \(i) * \(j)")
XCTAssertEqual(Decimal(i+j), Decimal(i) + Decimal(j), "\(Decimal(i+j)) == \(i)+\(j)")
XCTAssertEqual(Decimal(i-j), Decimal(i) - Decimal(j), "\(Decimal(i-j)) == \(i)-\(j)")
if j != 0 {
let approximation = Decimal(Double(i)/Double(j))
let answer = Decimal(i) / Decimal(j)
let answerDescription = answer.description
let approximationDescription = approximation.description
var failed: Bool = false
var count = 0
let SIG_FIG = 14
for (a, b) in zip(answerDescription, approximationDescription) {
if a != b {
failed = true
break
}
if count == 0 && (a == "-" || a == "0" || a == ".") {
continue // don't count these as significant figures
}
if count >= SIG_FIG {
break
}
count += 1
}
XCTAssertFalse(failed, "\(Decimal(i/j)) == \(i)/\(j)")
}
}
}
XCTAssertEqual(Decimal(186243 * 15673 as Int64), Decimal(186243) * Decimal(15673))
XCTAssertEqual(Decimal(string: "5538")! + Decimal(string: "2880.4")!, Decimal(string: "8418.4")!)
XCTAssertEqual(NSDecimalNumber(floatLiteral: 5538).adding(NSDecimalNumber(floatLiteral: 2880.4)), NSDecimalNumber(floatLiteral: 5538 + 2880.4))
XCTAssertEqual(Decimal(string: "5538.0")! - Decimal(string: "2880.4")!, Decimal(string: "2657.6")!)
XCTAssertEqual(Decimal(string: "2880.4")! - Decimal(5538), Decimal(string: "-2657.6")!)
XCTAssertEqual(Decimal(0x10000) - Decimal(0x1000), Decimal(0xf000))
XCTAssertEqual(Decimal(0x1_0000_0000) - Decimal(0x1000), Decimal(0xFFFFF000))
XCTAssertEqual(Decimal(0x1_0000_0000_0000) - Decimal(0x1000), Decimal(0xFFFFFFFFF000))
XCTAssertEqual(Decimal(1234_5678_9012_3456_7899 as UInt64) - Decimal(1234_5678_9012_3456_7890 as UInt64), Decimal(9))
XCTAssertEqual(Decimal(0xffdd_bb00_8866_4422 as UInt64) - Decimal(0x7777_7777), Decimal(0xFFDD_BB00_10EE_CCAB as UInt64))
XCTAssertEqual(NSDecimalNumber(floatLiteral: 5538).subtracting(NSDecimalNumber(floatLiteral: 2880.4)), NSDecimalNumber(floatLiteral: 5538 - 2880.4))
XCTAssertEqual(NSDecimalNumber(floatLiteral: 2880.4).subtracting(NSDecimalNumber(floatLiteral: 5538)), NSDecimalNumber(floatLiteral: 2880.4 - 5538))
XCTAssertEqual(Decimal.greatestFiniteMagnitude - Decimal.greatestFiniteMagnitude, Decimal(0))
XCTAssertEqual(Decimal.leastFiniteMagnitude - Decimal(1), Decimal.leastFiniteMagnitude)
let overflowed = Decimal.greatestFiniteMagnitude + Decimal.greatestFiniteMagnitude
XCTAssertTrue(overflowed.isNaN)
let highBit = Decimal(_exponent: 0, _length: 8, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8000))
let otherBits = Decimal(_exponent: 0, _length: 8, _isNegative: 0, _isCompact: 1, _reserved: 0, _mantissa: (0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0x7fff))
XCTAssertEqual(highBit - otherBits, Decimal(1))
XCTAssertEqual(otherBits + Decimal(1), highBit)
}
func test_Misc() {
XCTAssertEqual(.minus, Decimal(-5.2).sign)
XCTAssertEqual(.plus, Decimal(5.2).sign)
var d = Decimal(5.2)
XCTAssertEqual(.plus, d.sign)
d.negate()
XCTAssertEqual(.minus, d.sign)
d.negate()
XCTAssertEqual(.plus, d.sign)
var e = Decimal(0)
e.negate()
XCTAssertEqual(e, 0)
XCTAssertTrue(Decimal(3.5).isEqual(to: Decimal(3.5)))
XCTAssertTrue(Decimal.nan.isEqual(to: Decimal.nan))
XCTAssertTrue(Decimal(1.28).isLess(than: Decimal(2.24)))
XCTAssertFalse(Decimal(2.28).isLess(than: Decimal(2.24)))
XCTAssertTrue(Decimal(1.28).isTotallyOrdered(belowOrEqualTo: Decimal(2.24)))
XCTAssertFalse(Decimal(2.28).isTotallyOrdered(belowOrEqualTo: Decimal(2.24)))
XCTAssertTrue(Decimal(1.2).isTotallyOrdered(belowOrEqualTo: Decimal(1.2)))
XCTAssertTrue(Decimal.nan.isEqual(to: Decimal.nan))
XCTAssertTrue(Decimal.nan.isLess(than: Decimal(0)))
XCTAssertFalse(Decimal.nan.isLess(than: Decimal.nan))
XCTAssertTrue(Decimal.nan.isLessThanOrEqualTo(Decimal(0)))
XCTAssertTrue(Decimal.nan.isLessThanOrEqualTo(Decimal.nan))
XCTAssertFalse(Decimal.nan.isTotallyOrdered(belowOrEqualTo: Decimal.nan))
XCTAssertFalse(Decimal.nan.isTotallyOrdered(belowOrEqualTo: Decimal(2.3)))
XCTAssertTrue(Decimal(2) < Decimal(3))
XCTAssertTrue(Decimal(3) > Decimal(2))
// FIXME: This test is of questionable value. We should test hash properties.
XCTAssertEqual((1234 as Double).hashValue, Decimal(1234).hashValue)
XCTAssertEqual(Decimal(-9), Decimal(1) - Decimal(10))
XCTAssertEqual(Decimal(3), Decimal(2).nextUp)
XCTAssertEqual(Decimal(2), Decimal(3).nextDown)
XCTAssertEqual(Decimal(-476), Decimal(1024).distance(to: Decimal(1500)))
XCTAssertEqual(Decimal(68040), Decimal(386).advanced(by: Decimal(67654)))
XCTAssertEqual(Decimal(1.234), abs(Decimal(1.234)))
XCTAssertEqual(Decimal(1.234), abs(Decimal(-1.234)))
XCTAssertEqual((0 as Decimal).magnitude, 0 as Decimal)
XCTAssertEqual((1 as Decimal).magnitude, 1 as Decimal)
XCTAssertEqual((1 as Decimal).magnitude, abs(1 as Decimal))
XCTAssertEqual((1 as Decimal).magnitude, abs(-1 as Decimal))
XCTAssertEqual((-1 as Decimal).magnitude, abs(-1 as Decimal))
XCTAssertEqual((-1 as Decimal).magnitude, abs(1 as Decimal))
XCTAssertEqual(Decimal.leastFiniteMagnitude.magnitude, -Decimal.leastFiniteMagnitude) // A bit of a misnomer.
XCTAssertEqual(Decimal.greatestFiniteMagnitude.magnitude, Decimal.greatestFiniteMagnitude)
XCTAssertTrue(Decimal.nan.magnitude.isNaN)
var a = Decimal(1234)
var result = Decimal(0)
XCTAssertEqual(.noError, NSDecimalMultiplyByPowerOf10(&result, &a, 1, .plain))
XCTAssertEqual(Decimal(12340), result)
a = Decimal(1234)
XCTAssertEqual(.noError, NSDecimalMultiplyByPowerOf10(&result, &a, 2, .plain))
XCTAssertEqual(Decimal(123400), result)
a = result
XCTAssertEqual(.overflow, NSDecimalMultiplyByPowerOf10(&result, &a, 128, .plain))
XCTAssertTrue(result.isNaN)
a = Decimal(1234)
XCTAssertEqual(.noError, NSDecimalMultiplyByPowerOf10(&result, &a, -2, .plain))
XCTAssertEqual(Decimal(12.34), result)
a = result
XCTAssertEqual(.underflow, NSDecimalMultiplyByPowerOf10(&result, &a, -128, .plain))
XCTAssertTrue(result.isNaN)
a = Decimal(1234)
XCTAssertEqual(.noError, NSDecimalPower(&result, &a, 0, .plain))
XCTAssertEqual(Decimal(1), result)
a = Decimal(8)
XCTAssertEqual(.noError, NSDecimalPower(&result, &a, 2, .plain))
XCTAssertEqual(Decimal(64), result)
a = Decimal(-2)
XCTAssertEqual(.noError, NSDecimalPower(&result, &a, 3, .plain))
XCTAssertEqual(Decimal(-8), result)
for i in -2...10 {
for j in 0...5 {
var actual = Decimal(i)
var power = actual
XCTAssertEqual(.noError, NSDecimalPower(&actual, &power, j, .plain))
let expected = Decimal(pow(Double(i), Double(j)))
XCTAssertEqual(expected, actual, "\(actual) == \(i)^\(j)")
XCTAssertEqual(expected, pow(power, j))
}
}
}
func test_MultiplicationOverflow() {
var multiplicand = Decimal(_exponent: 0, _length: 8, _isNegative: 0, _isCompact: 0, _reserved: 0, _mantissa: ( 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff ))
var result = Decimal()
var multiplier = Decimal(1)
multiplier._mantissa.0 = 2
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &multiplicand, &multiplier, .plain), "2 * max mantissa")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &multiplier, &multiplicand, .plain), "max mantissa * 2")
multiplier._exponent = 0x7f
XCTAssertEqual(.overflow, NSDecimalMultiply(&result, &multiplicand, &multiplier, .plain), "2e127 * max mantissa")
XCTAssertEqual(.overflow, NSDecimalMultiply(&result, &multiplier, &multiplicand, .plain), "max mantissa * 2e127")
}
func test_NaNInput() {
var NaN = Decimal.nan
var one = Decimal(1)
var result = Decimal()
XCTAssertNotEqual(.noError, NSDecimalAdd(&result, &NaN, &one, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN + 1")
XCTAssertNotEqual(.noError, NSDecimalAdd(&result, &one, &NaN, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "1 + NaN")
XCTAssertNotEqual(.noError, NSDecimalSubtract(&result, &NaN, &one, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN - 1")
XCTAssertNotEqual(.noError, NSDecimalSubtract(&result, &one, &NaN, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "1 - NaN")
XCTAssertNotEqual(.noError, NSDecimalMultiply(&result, &NaN, &one, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN * 1")
XCTAssertNotEqual(.noError, NSDecimalMultiply(&result, &one, &NaN, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "1 * NaN")
XCTAssertNotEqual(.noError, NSDecimalDivide(&result, &NaN, &one, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN / 1")
XCTAssertNotEqual(.noError, NSDecimalDivide(&result, &one, &NaN, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "1 / NaN")
XCTAssertNotEqual(.noError, NSDecimalPower(&result, &NaN, 0, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN ^ 0")
XCTAssertNotEqual(.noError, NSDecimalPower(&result, &NaN, 4, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN ^ 4")
XCTAssertNotEqual(.noError, NSDecimalPower(&result, &NaN, 5, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN ^ 5")
XCTAssertNotEqual(.noError, NSDecimalMultiplyByPowerOf10(&result, &NaN, 0, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN e0")
XCTAssertNotEqual(.noError, NSDecimalMultiplyByPowerOf10(&result, &NaN, 4, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN e4")
XCTAssertNotEqual(.noError, NSDecimalMultiplyByPowerOf10(&result, &NaN, 5, .plain))
XCTAssertTrue(NSDecimalIsNotANumber(&result), "NaN e5")
XCTAssertFalse(Double(truncating: NSDecimalNumber(decimal: Decimal(0))).isNaN)
}
func test_NegativeAndZeroMultiplication() {
var one = Decimal(1)
var zero = Decimal(0)
var negativeOne = Decimal(-1)
var result = Decimal()
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &one, &one, .plain), "1 * 1")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&one, &result), "1 * 1")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &one, &negativeOne, .plain), "1 * -1")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&negativeOne, &result), "1 * -1")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &negativeOne, &one, .plain), "-1 * 1")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&negativeOne, &result), "-1 * 1")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &negativeOne, &negativeOne, .plain), "-1 * -1")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&one, &result), "-1 * -1")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &one, &zero, .plain), "1 * 0")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&zero, &result), "1 * 0")
XCTAssertEqual(0, result._isNegative, "1 * 0")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &zero, &one, .plain), "0 * 1")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&zero, &result), "0 * 1")
XCTAssertEqual(0, result._isNegative, "0 * 1")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &negativeOne, &zero, .plain), "-1 * 0")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&zero, &result), "-1 * 0")
XCTAssertEqual(0, result._isNegative, "-1 * 0")
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &zero, &negativeOne, .plain), "0 * -1")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&zero, &result), "0 * -1")
XCTAssertEqual(0, result._isNegative, "0 * -1")
}
func test_Normalise() {
var one = Decimal(1)
var ten = Decimal(-10)
XCTAssertEqual(.noError, NSDecimalNormalize(&one, &ten, .plain))
XCTAssertEqual(Decimal(1), one)
XCTAssertEqual(Decimal(-10), ten)
XCTAssertEqual(1, one._length)
XCTAssertEqual(1, ten._length)
one = Decimal(1)
ten = Decimal(10)
XCTAssertEqual(.noError, NSDecimalNormalize(&one, &ten, .plain))
XCTAssertEqual(Decimal(1), one)
XCTAssertEqual(Decimal(10), ten)
XCTAssertEqual(1, one._length)
XCTAssertEqual(1, ten._length)
// Check equality with numbers with large exponent difference
var small = Decimal.leastNonzeroMagnitude
var large = Decimal.greatestFiniteMagnitude
XCTAssertTrue(Int(large.exponent) - Int(small.exponent) > Int(Int8.max))
XCTAssertTrue(Int(small.exponent) - Int(large.exponent) < Int(Int8.min))
XCTAssertNotEqual(small, large)
XCTAssertEqual(small.exponent, -127)
XCTAssertEqual(large.exponent, 127)
XCTAssertEqual(.lossOfPrecision, NSDecimalNormalize(&small, &large, .plain))
XCTAssertEqual(small.exponent, 127)
XCTAssertEqual(large.exponent, 127)
small = Decimal.leastNonzeroMagnitude
large = Decimal.greatestFiniteMagnitude
XCTAssertEqual(small.exponent, -127)
XCTAssertEqual(large.exponent, 127)
XCTAssertEqual(.lossOfPrecision, NSDecimalNormalize(&large, &small, .plain))
XCTAssertEqual(small.exponent, 127)
XCTAssertEqual(large.exponent, 127)
}
func test_NSDecimal() throws {
var nan = Decimal.nan
XCTAssertTrue(NSDecimalIsNotANumber(&nan))
var zero = Decimal()
XCTAssertFalse(NSDecimalIsNotANumber(&zero))
var three = Decimal(3)
var guess = Decimal()
NSDecimalCopy(&guess, &three)
XCTAssertEqual(three, guess)
var f = Decimal(_exponent: 0, _length: 2, _isNegative: 0, _isCompact: 0, _reserved: 0, _mantissa: (0x0000, 0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000))
let before = f.description
XCTAssertEqual(0, f._isCompact)
NSDecimalCompact(&f)
XCTAssertEqual(1, f._isCompact)
let after = f.description
XCTAssertEqual(before, after)
let nsd1 = NSDecimalNumber(decimal: Decimal(2657.6))
let nsd2 = NSDecimalNumber(floatLiteral: 2657.6)
XCTAssertEqual(nsd1, nsd2)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).description, Int8.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.max)).description, Int8.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.min)).description, UInt8.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.max)).description, UInt8.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).description, Int16.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.max)).description, Int16.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.min)).description, UInt16.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.max)).description, UInt16.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).description, Int32.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.max)).description, Int32.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.min)).description, UInt32.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.max)).description, UInt32.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).description, Int64.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.max)).description, Int64.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt64.min)).description, UInt64.min.description)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt64.max)).description, UInt64.max.description)
XCTAssertEqual(NSDecimalNumber(decimal: try XCTUnwrap(Decimal(string: "12.34"))).description, "12.34")
XCTAssertEqual(NSDecimalNumber(decimal: try XCTUnwrap(Decimal(string: "0.0001"))).description, "0.0001")
XCTAssertEqual(NSDecimalNumber(decimal: try XCTUnwrap(Decimal(string: "-1.0002"))).description, "-1.0002")
XCTAssertEqual(NSDecimalNumber(decimal: try XCTUnwrap(Decimal(string: "0.0"))).description, "0")
}
func test_PositivePowers() {
let six = NSDecimalNumber(integerLiteral: 6)
XCTAssertEqual(6, six.raising(toPower:1).intValue)
XCTAssertEqual(36, six.raising(toPower:2).intValue)
XCTAssertEqual(216, six.raising(toPower:3).intValue)
XCTAssertEqual(1296, six.raising(toPower:4).intValue)
XCTAssertEqual(7776, six.raising(toPower:5).intValue)
XCTAssertEqual(46656, six.raising(toPower:6).intValue)
XCTAssertEqual(279936, six.raising(toPower:7).intValue)
XCTAssertEqual(1679616, six.raising(toPower:8).intValue)
XCTAssertEqual(10077696, six.raising(toPower:9).intValue)
let negativeSix = NSDecimalNumber(integerLiteral: -6)
XCTAssertEqual(-6, negativeSix.raising(toPower:1).intValue)
XCTAssertEqual(36, negativeSix.raising(toPower:2).intValue)
XCTAssertEqual(-216, negativeSix.raising(toPower:3).intValue)
XCTAssertEqual(1296, negativeSix.raising(toPower:4).intValue)
XCTAssertEqual(-7776, negativeSix.raising(toPower:5).intValue)
XCTAssertEqual(46656, negativeSix.raising(toPower:6).intValue)
XCTAssertEqual(-279936, negativeSix.raising(toPower:7).intValue)
XCTAssertEqual(1679616, negativeSix.raising(toPower:8).intValue)
XCTAssertEqual(-10077696, negativeSix.raising(toPower:9).intValue)
}
func test_RepeatingDivision() {
let repeatingNumerator = Decimal(16)
let repeatingDenominator = Decimal(9)
let repeating = repeatingNumerator / repeatingDenominator
let numerator = Decimal(1010)
var result = numerator / repeating
var expected = Decimal()
expected._exponent = -35;
expected._length = 8;
expected._isNegative = 0;
expected._isCompact = 1;
expected._reserved = 0;
expected._mantissa.0 = 51946;
expected._mantissa.1 = 3;
expected._mantissa.2 = 15549;
expected._mantissa.3 = 55864;
expected._mantissa.4 = 57984;
expected._mantissa.5 = 55436;
expected._mantissa.6 = 45186;
expected._mantissa.7 = 10941;
XCTAssertEqual(.orderedSame, NSDecimalCompare(&expected, &result), "568.12500000000000000000000000000248554: \(expected.description) != \(result.description)");
}
func test_Round() {
let testCases: [(Double, Double, Int, NSDecimalNumber.RoundingMode)] = [
// expected, start, scale, round
( 0, 0.5, 0, .down ),
( 1, 0.5, 0, .up ),
( 2, 2.5, 0, .bankers ),
( 4, 3.5, 0, .bankers ),
( 5, 5.2, 0, .plain ),
( 4.5, 4.5, 1, .down ),
( 5.5, 5.5, 1, .up ),
( 6.5, 6.5, 1, .plain ),
( 7.5, 7.5, 1, .bankers ),
( -1, -0.5, 0, .down ),
( -2, -2.5, 0, .up ),
( -3, -2.5, 0, .bankers ),
( -4, -3.5, 0, .bankers ),
( -5, -5.2, 0, .plain ),
( -4.5, -4.5, 1, .down ),
( -5.5, -5.5, 1, .up ),
( -6.5, -6.5, 1, .plain ),
( -7.5, -7.5, 1, .bankers ),
]
for testCase in testCases {
let (expected, start, scale, mode) = testCase
var num = Decimal(start)
var actual = Decimal(0)
NSDecimalRound(&actual, &num, scale, mode)
XCTAssertEqual(Decimal(expected), actual)
let numnum = NSDecimalNumber(decimal:Decimal(start))
let behavior = NSDecimalNumberHandler(roundingMode: mode, scale: Int16(scale), raiseOnExactness: false, raiseOnOverflow: true, raiseOnUnderflow: true, raiseOnDivideByZero: true)
let result = numnum.rounding(accordingToBehavior:behavior)
XCTAssertEqual(Double(expected), result.doubleValue)
}
}
func test_ScanDecimal() {
let testCases = [
// expected, value
( 123.456e78, "123.456e78" ),
( -123.456e78, "-123.456e78" ),
( 123.456, " 123.456 " ),
( 3.14159, " 3.14159e0" ),
( 3.14159, " 3.14159e-0" ),
( 0.314159, " 3.14159e-1" ),
( 3.14159, " 3.14159e+0" ),
( 31.4159, " 3.14159e+1" ),
( 12.34, " 01234e-02"),
]
for testCase in testCases {
let (expected, string) = testCase
let decimal = Decimal(string:string)!
let aboutOne = Decimal(expected) / decimal
let approximatelyRight = aboutOne >= Decimal(0.99999) && aboutOne <= Decimal(1.00001)
XCTAssertTrue(approximatelyRight, "\(expected) ~= \(decimal) : \(aboutOne) \(aboutOne >= Decimal(0.99999)) \(aboutOne <= Decimal(1.00001))" )
}
guard let ones = Decimal(string:"111111111111111111111111111111111111111") else {
XCTFail("Unable to parse Decimal(string:'111111111111111111111111111111111111111')")
return
}
let num = ones / Decimal(9)
guard let answer = Decimal(string:"12345679012345679012345679012345679012.3") else {
XCTFail("Unable to parse Decimal(string:'12345679012345679012345679012345679012.3')")
return
}
XCTAssertEqual(answer,num,"\(ones) / 9 = \(answer) \(num)")
}
func test_SimpleMultiplication() {
var multiplicand = Decimal()
multiplicand._isNegative = 0
multiplicand._isCompact = 0
multiplicand._length = 1
multiplicand._exponent = 1
var multiplier = multiplicand
multiplier._exponent = 2
var expected = multiplicand
expected._isNegative = 0
expected._isCompact = 0
expected._exponent = 3
expected._length = 1
var result = Decimal()
for i in 1..<UInt8.max {
multiplicand._mantissa.0 = UInt16(i)
for j in 1..<UInt8.max {
multiplier._mantissa.0 = UInt16(j)
expected._mantissa.0 = UInt16(i) * UInt16(j)
XCTAssertEqual(.noError, NSDecimalMultiply(&result, &multiplicand, &multiplier, .plain), "\(i) * \(j)")
XCTAssertEqual(.orderedSame, NSDecimalCompare(&expected, &result), "\(expected._mantissa.0) == \(i) * \(j)");
}
}
}
func test_SmallerNumbers() {
var number = NSDecimalNumber(booleanLiteral:true)
XCTAssertTrue(number.boolValue, "Should have received true")
number = NSDecimalNumber(mantissa:0, exponent:0, isNegative:false)
XCTAssertFalse(number.boolValue, "Should have received false")
number = NSDecimalNumber(mantissa:1, exponent:0, isNegative:false)
XCTAssertTrue(number.boolValue, "Should have received true")
XCTAssertEqual(100,number.objCType.pointee, "ObjC type for NSDecimalNumber is 'd'")
}
func test_ZeroPower() {
let six = NSDecimalNumber(integerLiteral: 6)
XCTAssertEqual(1, six.raising(toPower: 0))
let negativeSix = NSDecimalNumber(integerLiteral: -6)
XCTAssertEqual(1, negativeSix.raising(toPower: 0))
}
func test_doubleValue() {
XCTAssertEqual(NSDecimalNumber(decimal:Decimal(0)).doubleValue, 0)
XCTAssertEqual(NSDecimalNumber(decimal:Decimal(1)).doubleValue, 1)
XCTAssertEqual(NSDecimalNumber(decimal:Decimal(-1)).doubleValue, -1)
XCTAssertTrue(NSDecimalNumber(decimal:Decimal.nan).doubleValue.isNaN)
XCTAssertEqual(NSDecimalNumber(decimal:Decimal(UInt64.max)).doubleValue, Double(1.8446744073709552e+19))
XCTAssertEqual(NSDecimalNumber(decimal:Decimal(string: "1234567890123456789012345678901234567890")!).doubleValue, Double(1.2345678901234568e+39))
var d = Decimal()
d._mantissa.0 = 1
d._mantissa.1 = 2
d._mantissa.2 = 3
d._mantissa.3 = 4
d._mantissa.4 = 5
d._mantissa.5 = 6
d._mantissa.6 = 7
d._mantissa.7 = 8
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 0)
XCTAssertEqual(d, Decimal(0))
d._length = 1
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 1)
XCTAssertEqual(d, Decimal(1))
d._length = 2
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 131073)
XCTAssertEqual(d, Decimal(131073))
d._length = 3
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 12885032961)
XCTAssertEqual(d, Decimal(12885032961))
d._length = 4
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 1125912791875585)
XCTAssertEqual(d, Decimal(1125912791875585))
d._length = 5
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 9.223484628133963e+19)
XCTAssertEqual(d, Decimal(string: "92234846281339633665")!)
d._length = 6
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 7.253647152534056e+24)
XCTAssertEqual(d, Decimal(string: "7253647152534056387870721")!)
d._length = 7
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 5.546043912470029e+29)
XCTAssertEqual(d, Decimal(string: "554604391247002897211195523073")!)
d._length = 8
XCTAssertEqual(NSDecimalNumber(decimal: d).doubleValue, 4.153892947266987e+34)
XCTAssertEqual(d, Decimal(string: "41538929472669868031141181829283841")!)
// The result of the subtractions can leave values in the internal mantissa of a and b,
// although _length = 0 which is correct.
let x = Decimal(10.5)
let y = Decimal(9.0)
let z = Decimal(1.5)
let a = x - y - z
let b = x - z - y
XCTAssertEqual(x.description, "10.5")
XCTAssertEqual(y.description, "9")
XCTAssertEqual(z.description, "1.5")
XCTAssertEqual(a.description, "0")
XCTAssertEqual(b.description, "0")
XCTAssertEqual(NSDecimalNumber(decimal: x).doubleValue, 10.5)
XCTAssertEqual(NSDecimalNumber(decimal: y).doubleValue, 9.0)
XCTAssertEqual(NSDecimalNumber(decimal: z).doubleValue, 1.5)
XCTAssertEqual(NSDecimalNumber(decimal: a).doubleValue, 0.0)
XCTAssertEqual(NSDecimalNumber(decimal: b).doubleValue, 0.0)
let nf = NumberFormatter()
nf.locale = Locale(identifier: "en_US")
nf.numberStyle = .decimal
nf.minimumFractionDigits = 2
nf.maximumFractionDigits = 2
XCTAssertEqual(nf.string(from: NSDecimalNumber(decimal: x)), "10.50")
XCTAssertEqual(nf.string(from: NSDecimalNumber(decimal: y)), "9.00")
XCTAssertEqual(nf.string(from: NSDecimalNumber(decimal: z)), "1.50")
XCTAssertEqual(nf.string(from: NSDecimalNumber(decimal: a)), "0.00")
XCTAssertEqual(nf.string(from: NSDecimalNumber(decimal: b)), "0.00")
}
func test_NSDecimalNumberValues() {
let uint64MaxDecimal = Decimal(string: UInt64.max.description)!
// int8Value
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(0)).int8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-1)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).int8Value, 1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-129)).int8Value, 127)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(128)).int8Value, -128)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).int8Value, Int8.min)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).int8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).int8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).int8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.max)).int8Value, Int8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.max)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.max)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.max)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.max)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.max)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.max)).int8Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: uint64MaxDecimal).int8Value, -1)
// uint8Value
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(0)).uint8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-1)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).uint8Value, 1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-129)).uint8Value, 127)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(128)).uint8Value, 128)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(256)).uint8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).uint8Value, 128)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).uint8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).uint8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).uint8Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.max)).uint8Value, 127)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.max)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.max)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.max)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.max)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.max)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.max)).uint8Value, UInt8.max)
XCTAssertEqual(NSDecimalNumber(decimal: uint64MaxDecimal).uint8Value, UInt8.max)
// int16Value
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(0)).int16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-1)).int16Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).int16Value, 1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-32769)).int16Value, 32767)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(32768)).int16Value, -32768)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).int16Value, -128)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).int16Value, Int16.min)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).int16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).int16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.max)).int16Value, 127)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.max)).int16Value, Int16.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.max)).int16Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.max)).int16Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.max)).int16Value, 255)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.max)).int16Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.max)).int16Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: uint64MaxDecimal).int16Value, -1)
// uint16Value
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(0)).uint16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-1)).uint16Value, UInt16.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).uint16Value, 1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-32769)).uint16Value, 32767)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(32768)).uint16Value, 32768)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(65536)).uint16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).uint16Value, 65408)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).uint16Value, 32768)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).uint16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).uint16Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.max)).uint16Value, 127)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.max)).uint16Value, 32767)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.max)).uint16Value, UInt16.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.max)).uint16Value, UInt16.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.max)).uint16Value, 255)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.max)).uint16Value, UInt16.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.max)).uint16Value, UInt16.max)
XCTAssertEqual(NSDecimalNumber(decimal: uint64MaxDecimal).uint16Value, UInt16.max)
// int32Value
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(0)).int32Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-1)).int32Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).int32Value, 1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-32769)).int32Value, -32769)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(32768)).int32Value, 32768)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).int32Value, -128)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).int32Value, -32768)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).int32Value, Int32.min)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).int32Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.max)).int32Value, 127)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.max)).int32Value, 32767)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.max)).int32Value, Int32.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.max)).int32Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt8.max)).int32Value, 255)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt16.max)).int32Value, 65535)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(UInt32.max)).int32Value, -1)
XCTAssertEqual(NSDecimalNumber(decimal: uint64MaxDecimal).int32Value, -1)
// uint32Value
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(0)).uint32Value, 0)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-1)).uint32Value, UInt32.max)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(1)).uint32Value, 1)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(-32769)).uint32Value, 4294934527)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(32768)).uint32Value, 32768)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(65536)).uint32Value, 65536)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int8.min)).uint32Value, 4294967168)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int16.min)).uint32Value, 4294934528)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int32.min)).uint32Value, 2147483648)
XCTAssertEqual(NSDecimalNumber(decimal: Decimal(Int64.min)).uint32Value, 0)