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8bc6143a4c
Rename `move(along:)` to `move(by:)` based on the proposal feedback. The main argument for the change is that tangent vectors specify both a direction and a magnitude, whereas `along:` does not indicate that `self` is being moved by the specified magnitude.
80 lines
2.5 KiB
Swift
80 lines
2.5 KiB
Swift
// RUN: %target-run-simple-swift
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// REQUIRES: executable_test
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import _Differentiation
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import StdlibUnittest
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var OptionalDifferentiationTests = TestSuite("OptionalDifferentiation")
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OptionalDifferentiationTests.test("Optional operations") {
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// Differentiable.move(by:)
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do {
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var some: Float? = 2
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some.move(by: .init(3))
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expectEqual(5, some)
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var none: Float? = nil
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none.move(by: .init(3))
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expectEqual(nil, none)
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}
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}
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OptionalDifferentiationTests.test("Optional.TangentVector operations") {
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// Differentiable.move(by:)
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do {
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var some: Optional<Float>.TangentVector = .init(2)
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some.move(by: .init(3))
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expectEqual(5, some.value)
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var none: Optional<Float>.TangentVector = .init(nil)
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none.move(by: .init(3))
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expectEqual(nil, none.value)
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var nestedSome: Optional<Optional<Float>>.TangentVector = .init(.init(2))
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nestedSome.move(by: .init(.init(3)))
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expectEqual(.init(5), nestedSome.value)
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var nestedNone: Optional<Optional<Float>>.TangentVector = .init(.init(nil))
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nestedNone.move(by: .init(.init(3)))
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expectEqual(.init(nil), nestedNone.value)
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}
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// AdditiveArithmetic.zero
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expectEqual(.init(Float.zero), Float?.TangentVector.zero)
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expectEqual(.init([Float].TangentVector.zero), [Float]?.TangentVector.zero)
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expectEqual(.init(.init(Float.zero)), Float??.TangentVector.zero)
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expectEqual(.init(.init([Float].TangentVector.zero)), [Float]??.TangentVector.zero)
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// AdditiveArithmetic.+, AdditiveArithmetic.-
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do {
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let some: Optional<Float>.TangentVector = .init(2)
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let none: Optional<Float>.TangentVector = .init(nil)
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expectEqual(.init(4), some + some)
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expectEqual(.init(2), some + none)
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expectEqual(.init(2), none + some)
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expectEqual(.init(nil), none + none)
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expectEqual(.init(0), some - some)
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expectEqual(.init(2), some - none)
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expectEqual(.init(-2), none - some)
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expectEqual(.init(nil), none - none)
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let nestedSome: Optional<Optional<Float>>.TangentVector = .init(.init(2))
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let nestedNone: Optional<Optional<Float>>.TangentVector = .init(.init(nil))
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expectEqual(.init(.init(4)), nestedSome + nestedSome)
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expectEqual(.init(.init(2)), nestedSome + nestedNone)
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expectEqual(.init(.init(2)), nestedNone + nestedSome)
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expectEqual(.init(.init(nil)), nestedNone + nestedNone)
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expectEqual(.init(.init(0)), nestedSome - nestedSome)
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expectEqual(.init(.init(2)), nestedSome - nestedNone)
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expectEqual(.init(.init(-2)), nestedNone - nestedSome)
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expectEqual(.init(.init(nil)), nestedNone - nestedNone)
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}
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}
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runAllTests()
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