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Copy pathANKSigned+Subtraction.swift
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ANKSigned+Subtraction.swift
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//=----------------------------------------------------------------------------=
// This source file is part of the AwesomeNumbersKit open source project.
//
// Copyright (c) 2022 Oscar Byström Ericsson
// Licensed under Apache License, Version 2.0
//
// See http://www.apache.org/licenses/LICENSE-2.0 for license information.
//=----------------------------------------------------------------------------=
#if DEBUG
import ANKFullWidthKit
import ANKSignedKit
import XCTest
//*============================================================================*
// MARK: * ANK x Signed x Subtraction
//*============================================================================*
final class ANKSignedTestsOnSubtraction: XCTestCase {
typealias T = ANKSigned<UInt256>
typealias D = ANKSigned<UInt>
//=------------------------------------------------------------------------=
// MARK: Tests
//=------------------------------------------------------------------------=
func testSubtracting() {
ANKAssertSubtraction( T(1), T(2), -T(1))
ANKAssertSubtraction( T(1), T(1), T(0))
ANKAssertSubtraction( T(1), T(0), T(1))
ANKAssertSubtraction( T(1), -T(0), T(1))
ANKAssertSubtraction( T(1), -T(1), T(2))
ANKAssertSubtraction( T(1), -T(2), T(3))
ANKAssertSubtraction( T(0), T(2), -T(2))
ANKAssertSubtraction( T(0), T(1), -T(1))
ANKAssertSubtraction( T(0), T(0), T(0))
ANKAssertSubtraction( T(0), -T(0), T(0))
ANKAssertSubtraction( T(0), -T(1), T(1))
ANKAssertSubtraction( T(0), -T(2), T(2))
ANKAssertSubtraction(-T(0), T(2), -T(2))
ANKAssertSubtraction(-T(0), T(1), -T(1))
ANKAssertSubtraction(-T(0), T(0), -T(0))
ANKAssertSubtraction(-T(0), -T(0), -T(0))
ANKAssertSubtraction(-T(0), -T(1), T(1))
ANKAssertSubtraction(-T(0), -T(2), T(2))
ANKAssertSubtraction(-T(1), T(2), -T(3))
ANKAssertSubtraction(-T(1), T(1), -T(2))
ANKAssertSubtraction(-T(1), T(0), -T(1))
ANKAssertSubtraction(-T(1), -T(0), -T(1))
ANKAssertSubtraction(-T(1), -T(1), -T(0))
ANKAssertSubtraction(-T(1), -T(2), T(1))
}
func testSubtractingReportingOverflow() {
ANKAssertSubtraction(T.min, T(2), T( ) - T(1), true )
ANKAssertSubtraction(T.min, -T(2), T.min + T(2), false)
ANKAssertSubtraction(T.max, T(2), T.max - T(2), false)
ANKAssertSubtraction(T.max, -T(2), T( ) + T(1), true )
}
//=------------------------------------------------------------------------=
// MARK: Tests x Digit
//=------------------------------------------------------------------------=
func testSubtractingDigit() {
ANKAssertSubtractionByDigit( T(1), D(2), -T(1))
ANKAssertSubtractionByDigit( T(1), D(1), T(0))
ANKAssertSubtractionByDigit( T(1), D(0), T(1))
ANKAssertSubtractionByDigit( T(1), -D(0), T(1))
ANKAssertSubtractionByDigit( T(1), -D(1), T(2))
ANKAssertSubtractionByDigit( T(1), -D(2), T(3))
ANKAssertSubtractionByDigit( T(0), D(2), -T(2))
ANKAssertSubtractionByDigit( T(0), D(1), -T(1))
ANKAssertSubtractionByDigit( T(0), D(0), T(0))
ANKAssertSubtractionByDigit( T(0), -D(0), T(0))
ANKAssertSubtractionByDigit( T(0), -D(1), T(1))
ANKAssertSubtractionByDigit( T(0), -D(2), T(2))
ANKAssertSubtractionByDigit(-T(0), D(2), -T(2))
ANKAssertSubtractionByDigit(-T(0), D(1), -T(1))
ANKAssertSubtractionByDigit(-T(0), D(0), -T(0))
ANKAssertSubtractionByDigit(-T(0), -D(0), -T(0))
ANKAssertSubtractionByDigit(-T(0), -D(1), T(1))
ANKAssertSubtractionByDigit(-T(0), -D(2), T(2))
ANKAssertSubtractionByDigit(-T(1), D(2), -T(3))
ANKAssertSubtractionByDigit(-T(1), D(1), -T(2))
ANKAssertSubtractionByDigit(-T(1), D(0), -T(1))
ANKAssertSubtractionByDigit(-T(1), -D(0), -T(1))
ANKAssertSubtractionByDigit(-T(1), -D(1), -T(0))
ANKAssertSubtractionByDigit(-T(1), -D(2), T(1))
}
func testSubtractingDigitReportingOverflow() {
ANKAssertSubtractionByDigit(T.min, D(2), T( ) - T(1), true )
ANKAssertSubtractionByDigit(T.min, -D(2), T.min + T(2), false)
ANKAssertSubtractionByDigit(T.max, D(2), T.max - T(2), false)
ANKAssertSubtractionByDigit(T.max, -D(2), T( ) + T(1), true )
}
//=------------------------------------------------------------------------=
// MARK: Tests x Miscellaneous
//=------------------------------------------------------------------------=
func testOverloadsAreUnambiguousWhenUsingIntegerLiterals() {
func becauseThisCompilesSuccessfully(_ x: inout T) {
XCTAssertNotNil(x -= 0)
XCTAssertNotNil(x &-= 0)
XCTAssertNotNil(x.subtractReportingOverflow(0))
XCTAssertNotNil(x - 0)
XCTAssertNotNil(x &- 0)
XCTAssertNotNil(x.subtractingReportingOverflow(0))
}
}
func testOverloadsAreUnambiguousWhereDigitIsSelf() {
func becauseThisCompilesSuccessfully(_ x: inout D.Digit) {
XCTAssertNotNil(x -= D(0))
XCTAssertNotNil(x &-= D(0))
XCTAssertNotNil(x.subtractReportingOverflow(D(0)))
XCTAssertNotNil(x - D(0))
XCTAssertNotNil(x &- D(0))
XCTAssertNotNil(x.subtractingReportingOverflow(D(0)))
}
}
}
#endif