NetNewsWire/Frameworks/Account/AccountTests/Feedly/TestGetPagedStreamContentsS...

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//
// TestGetPagedStreamContentsService.swift
// AccountTests
//
// Created by Kiel Gillard on 28/10/19.
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
//
import XCTest
@testable import Account
final class TestGetPagedStreamContentsService: FeedlyGetStreamContentsService {
var parameterTester: ((FeedlyResourceId, String?, Date?, Bool?) -> ())?
var getStreamContentsExpectation: XCTestExpectation?
var pages = [String: FeedlyStream]()
func addAtLeastOnePage(for resource: FeedlyResourceId, continuations: [String], numberOfEntriesPerPage count: Int) {
pages = [String: FeedlyStream](minimumCapacity: continuations.count + 1)
// A continuation is an identifier for the next page.
// The first page has a nil identifier.
// The last page has no next page, so the next continuation value for that page is nil.
// Therefore, each page needs to know the identifier of the next page.
for index in -1..<continuations.count {
let nextIndex = index + 1
let continuation: String? = nextIndex < continuations.count ? continuations[nextIndex] : nil
let page = makeStreamContents(for: resource, continuation: continuation, between: 0..<count)
let key = TestGetPagedStreamContentsService.getPagingKey(for: resource, continuation: index < 0 ? nil : continuations[index])
pages[key] = page
}
}
private func makeStreamContents(for resource: FeedlyResourceId, continuation: String?, between range: Range<Int>) -> FeedlyStream {
let entries = range.map { index -> FeedlyEntry in
let content = FeedlyEntry.Content(content: "Content \(index)",
direction: .leftToRight)
let origin = FeedlyOrigin(title: "Origin \(index)",
streamId: resource.id,
htmlUrl: "http://localhost/feedly/origin/\(index)")
return FeedlyEntry(id: "/articles/\(index)",
title: "Article \(index)",
content: content,
summary: content,
author: nil,
crawled: Date(),
recrawled: nil,
origin: origin,
canonical: nil,
alternate: nil,
unread: true,
tags: nil,
categories: nil,
enclosure: nil)
}
let stream = FeedlyStream(id: resource.id, updated: nil, continuation: continuation, items: entries)
return stream
}
static func getPagingKey(for stream: FeedlyResourceId, continuation: String?) -> String {
return "\(stream.id)@\(continuation ?? "")"
}
func getStreamContents(for resource: FeedlyResourceId, continuation: String?, newerThan: Date?, unreadOnly: Bool?, completion: @escaping (Result<FeedlyStream, Error>) -> ()) {
let key = TestGetPagedStreamContentsService.getPagingKey(for: resource, continuation: continuation)
guard let page = pages[key] else {
XCTFail("Missing page for \(resource.id) and continuation \(String(describing: continuation)). Test may time out because the completion will not be called.")
return
}
parameterTester?(resource, continuation, newerThan, unreadOnly)
DispatchQueue.main.async {
completion(.success(page))
self.getStreamContentsExpectation?.fulfill()
}
}
}