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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCrypto open source project
//
// Copyright (c) 2019-2020 Apple Inc. and the SwiftCrypto project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.md for the list of SwiftCrypto project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import XCTest
// Xcode 11.4 catches errors thrown during tests and reports them on the
// correct line. But Linux and older Xcodes do not, so we need to use this
// wrapper as long as those platforms are supported.
func orFail<T>(file: StaticString = #file, line: UInt = #line, _ closure: () throws -> T) throws -> T {
func wrapper<U>(_ closure: () throws -> U, file: StaticString, line: UInt) throws -> U {
do {
return try closure()
} catch {
XCTFail("Function threw error: \(error)", file: file, line: line)
throw error
}
}
if #available(macOS 10.15.4, macCatalyst 13.4, iOS 13.4, tvOS 13.4, watchOS 6.0, *) {
return try closure()
} else {
return try wrapper(closure, file: file, line: line)
}
}
extension XCTestCase {
struct OptionalUnwrappingError: Error {
let file: StaticString
let line: UInt
}
/// Unwraps the given optional value, or if it is nil, throws an error and
/// registers an XCTest failure. Meant to be used in a test method that has
/// been marked as `throws`.
/// - Note: this is a replacement for `XCTUnwrap`, which is not available
/// in SPM command line builds as of this writing: <https://bugs.swift.org/browse/SR-11501>
func unwrap<T>(_ optional: T?, file: StaticString = (#file), line: UInt = #line) throws -> T {
guard let wrapped = optional else {
XCTFail("Optional was nil", file: file, line: line)
throw OptionalUnwrappingError(file: file, line: line)
}
return wrapped
}
}
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