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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Atomics open source project
//
// Copyright (c) 2020 - 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import XCTest
import Atomics
class AtomicLazyReferenceTests: XCTestCase {
func test_unsafe_create_destroy() {
XCTAssertEqual(LifetimeTracked.instances, 0)
let v = UnsafeAtomicLazyReference<LifetimeTracked>.create()
defer {
v.destroy()
XCTAssertEqual(LifetimeTracked.instances, 0)
}
XCTAssertNil(v.load())
}
func test_unsafe_storeIfNilThenLoad() {
XCTAssertEqual(LifetimeTracked.instances, 0)
do {
let v = UnsafeAtomicLazyReference<LifetimeTracked>.create()
XCTAssertNil(v.load())
let ref = LifetimeTracked(42)
XCTAssertTrue(v.storeIfNilThenLoad(ref) === ref)
XCTAssertTrue(v.load() === ref)
let ref2 = LifetimeTracked(23)
XCTAssertTrue(v.storeIfNilThenLoad(ref2) === ref)
XCTAssertTrue(v.load() === ref)
v.destroy()
}
XCTAssertEqual(LifetimeTracked.instances, 0)
}
func test_managed_storeIfNilThenLoad() {
XCTAssertEqual(LifetimeTracked.instances, 0)
do {
let v = ManagedAtomicLazyReference<LifetimeTracked>()
XCTAssertNil(v.load())
let ref = LifetimeTracked(42)
XCTAssertTrue(v.storeIfNilThenLoad(ref) === ref)
XCTAssertTrue(v.load() === ref)
let ref2 = LifetimeTracked(23)
XCTAssertTrue(v.storeIfNilThenLoad(ref2) === ref)
XCTAssertTrue(v.load() === ref)
}
XCTAssertEqual(LifetimeTracked.instances, 0)
}
#if MANUAL_TEST_DISCOVERY
public static var allTests = [
("test_unsafe_create_destroy", test_unsafe_create_destroy),
("test_unsafe_storeIfNilThenLoad", test_unsafe_storeIfNilThenLoad),
("test_managed_storeIfNilThenLoad", test_managed_storeIfNilThenLoad),
]
#endif
}
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