swift-mirror/test/Interop/Cxx/stdlib/use-std-optional.swift

// RUN: %target-run-simple-swift(-I %S/Inputs -Xfrontend -enable-experimental-cxx-interop -Xcc -std=c++17)
//
// REQUIRES: executable_test
// REQUIRES: OS=macosx || OS=linux-gnu

import StdlibUnittest
import StdOptional
import CxxStdlib

var StdOptionalTestSuite = TestSuite("StdOptional")

StdOptionalTestSuite.test("pointee") {
  let nonNilOpt = getNonNilOptional()
  let pointee = nonNilOpt.pointee
  expectEqual(123, pointee)
}

StdOptionalTestSuite.test("std::optional => Swift.Optional") {
  let nonNilOpt = getNonNilOptional()
  let swiftOptional = Optional(fromCxx: nonNilOpt)
  expectNotNil(swiftOptional)
  expectEqual(123, swiftOptional!)

  let nilOpt = getNilOptional()
  let swiftNil = Optional(fromCxx: nilOpt)
  expectNil(swiftNil)
}

StdOptionalTestSuite.test("std::optional hasValue/value") {
  let nonNilOpt = getNonNilOptional()
  expectTrue(nonNilOpt.hasValue)
  expectEqual(123, nonNilOpt.value)

  let nilOpt = getNilOptional()
  expectFalse(nilOpt.hasValue)
}

runAllTests()