| // RUN: %target-run-simple-swift |
| // REQUIRES: executable_test |
| |
| import StdlibUnittest |
| #if os(macOS) |
| import Darwin.C |
| #else |
| import Glibc |
| #endif |
| |
| // Test suite for differentiable higher order functions for collections |
| // such as `differentiableMap(_:)` and `differentiableReduce(_:)`. |
| var CollectionHOFTests = TestSuite("CollectionHOF") |
| |
| let xx: [Float] = [1, 2, 3, 4, 5] |
| |
| CollectionHOFTests.test("differentiableMap(_:)") { |
| func double(_ xx: [Float]) -> [Float] { |
| xx.differentiableMap { $0 * $0 } |
| } |
| expectEqual([], pullback(at: xx, in: double)([])) |
| expectEqual([0], pullback(at: xx, in: double)([0])) |
| expectEqual([2], pullback(at: xx, in: double)([1])) |
| expectEqual([2, 4, 6, 8, 10], pullback(at: xx, in: double)([1, 1, 1, 1, 1])) |
| } |
| |
| CollectionHOFTests.test("differentiableReduce(_:)") { |
| func product(_ xx: [Float]) -> Float { |
| xx.differentiableReduce(1) { $0 * $1 } |
| } |
| expectEqual([1], gradient(at: [0], in: product)) |
| expectEqual([1], gradient(at: [1], in: product)) |
| expectEqual([120, 60, 40, 30, 24], gradient(at: xx, in: product)) |
| } |
| |
| runAllTests() |
