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//===------------ Fixture.swift - Driver Testing Extensions --------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2020 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 TSCBasic
/// Contains helpers for retrieving paths to fixtures under the
/// repo-local `TestInputs` directory.
public enum Fixture {
/// Form a path to a file residing in the test fixtures directory under the
/// root of this package.
/// - Parameters:
/// - file: The name of the fixture file to search for.
/// - relativePath: The relative path of the subdirectory under
/// `<package-root>/TestInputs`
/// - fileSystem: The filesystem on which to search.
/// - Returns: A path to the fixture file if the resulting path exists on the
/// given file system. Else, returns `nil`.
public static func fixturePath(
at relativePath: RelativePath,
for file: String,
on fileSystem: FileSystem = localFileSystem
) throws -> AbsolutePath? {
let packageRootPath: AbsolutePath =
try AbsolutePath(validating: #file).parentDirectory.parentDirectory.parentDirectory
let fixturePath =
try AbsolutePath(validating: relativePath.pathString,
relativeTo: packageRootPath.appending(component: "TestInputs"))
.appending(component: file)
// Check that the fixture is really there.
guard fileSystem.exists(fixturePath) else {
return nil
}
return fixturePath
}
}
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