mas/Tests/masTests/Extensions/Bundle+JSON.swift

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//
// Bundle+JSON.swift
// masTests
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//
// Created by Ben Chatelain on 1/5/19.
// Copyright © 2019 mas-cli. All rights reserved.
//
import Foundation
extension Data {
/// Unsafe initializer for loading data from string paths.
///
/// - Parameter fileName: Relative path within the JSON folder
init(from fileName: String) {
let fileURL = Bundle.url(for: fileName)!
try! self.init(contentsOf: fileURL, options: .mappedIfSafe)
}
}
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extension Bundle {
/// Locates a JSON response file from the test bundle.
///
/// - Parameter fileName: Name of file to locate.
/// - Returns: URL to file.
static func url(for fileName: String) -> URL? {
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// The Swift Package Manager places resources in a separate bundle from the executable.
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// https://forums.swift.org/t/swift-5-3-spm-resources-in-tests-uses-wrong-bundle-path/37051
let bundleURL = Bundle(for: NetworkSessionMock.self)
.bundleURL
.deletingLastPathComponent()
.appendingPathComponent("mas_masTests.bundle")
guard
let bundle = Bundle(url: bundleURL),
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let url = bundle.url(for: fileName)
else {
fatalError("Unable to load file \(fileName)")
}
return url
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}
/// Builds a URL for a file in the JSON directory of the current bundle.
///
/// - Parameter fileName: Name of file to locate.
/// - Returns: URL to file.
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private func url(for fileName: String) -> URL? {
url(
forResource: fileName.fileNameWithoutExtension,
withExtension: fileName.fileExtension,
subdirectory: "JSON"
)
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}
}