NetNewsWire/Frameworks/Account/AccountTests/TestTransport.swift

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//
// TestTransport.swift
// AccountTests
//
// Created by Maurice Parker on 5/4/19.
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import RSWeb
import XCTest
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protocol TestTransportMockResponseProviding: class {
func mockResponseFileUrl(for components: URLComponents) -> URL?
}
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final class TestTransport: Transport {
enum TestTransportError: String, Error {
case invalidState = "The test wasn't set up correctly."
}
var testFiles = [String: String]()
var testStatusCodes = [String: Int]()
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weak var mockResponseFileUrlProvider: TestTransportMockResponseProviding?
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private func httpResponse(for request: URLRequest, statusCode: Int = 200) -> HTTPURLResponse {
guard let url = request.url else {
fatalError("Attempting to mock a http response for a request without a URL \(request).")
}
return HTTPURLResponse(url: url, statusCode: statusCode, httpVersion: "HTTP/1.1", headerFields: nil)!
}
func cancelAll() { }
func send(request: URLRequest, completion: @escaping (Result<(HTTPURLResponse, Data?), Error>) -> Void) {
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guard let url = request.url, let components = URLComponents(url: url, resolvingAgainstBaseURL: false) else {
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completion(.failure(TestTransportError.invalidState))
return
}
let urlString = url.absoluteString
let response = httpResponse(for: request, statusCode: testStatusCodes[urlString] ?? 200)
let testFileURL: URL
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if let provider = mockResponseFileUrlProvider {
guard let providerUrl = provider.mockResponseFileUrl(for: components) else {
XCTFail("Test behaviour undefined. Mock provider failed to provide non-nil URL for \(components).")
return
}
testFileURL = providerUrl
} else if let testKeyAndFileName = testFiles.first(where: { urlString.contains($0.key) }) {
testFileURL = Bundle(for: TestTransport.self).resourceURL!.appendingPathComponent(testKeyAndFileName.value)
} else {
// XCTFail("Missing mock response for: \(urlString)")
print("***\nWARNING: \(self) missing mock response for:\n\(urlString)\n***")
DispatchQueue.global(qos: .background).async {
completion(.success((response, nil)))
}
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return
}
do {
let data = try Data(contentsOf: testFileURL)
DispatchQueue.global(qos: .background).async {
completion(.success((response, data)))
}
} catch {
XCTFail("Unable to read file at \(testFileURL) because \(error).")
DispatchQueue.global(qos: .background).async {
completion(.failure(error))
}
}
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}
func send(request: URLRequest, method: String, completion: @escaping (Result<Void, Error>) -> Void) {
fatalError("Unimplemented.")
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}
func send(request: URLRequest, method: String, payload: Data, completion: @escaping (Result<(HTTPURLResponse, Data?), Error>) -> Void) {
fatalError("Unimplemented.")
}
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}