57 lines
2.4 KiB
Swift
57 lines
2.4 KiB
Swift
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//
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// TestGetPagedStreamIdsService.swift
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// AccountTests
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//
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// Created by Kiel Gillard on 29/10/19.
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// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
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//
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import XCTest
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@testable import Account
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final class TestGetPagedStreamIdsService: FeedlyGetStreamIdsService {
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var parameterTester: ((FeedlyResourceId, String?, Date?, Bool?) -> ())?
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var getStreamIdsExpectation: XCTestExpectation?
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var pages = [String: FeedlyStreamIds]()
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func addAtLeastOnePage(for resource: FeedlyResourceId, continuations: [String], numberOfEntriesPerPage count: Int) {
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pages = [String: FeedlyStreamIds](minimumCapacity: continuations.count + 1)
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// A continuation is an identifier for the next page.
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// The first page has a nil identifier.
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// The last page has no next page, so the next continuation value for that page is nil.
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// Therefore, each page needs to know the identifier of the next page.
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for index in -1..<continuations.count {
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let nextIndex = index + 1
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let continuation: String? = nextIndex < continuations.count ? continuations[nextIndex] : nil
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let page = makeStreamIds(for: resource, continuation: continuation, between: 0..<count)
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let key = TestGetPagedStreamIdsService.getPagingKey(for: resource, continuation: index < 0 ? nil : continuations[index])
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pages[key] = page
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}
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}
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private func makeStreamIds(for resource: FeedlyResourceId, continuation: String?, between range: Range<Int>) -> FeedlyStreamIds {
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let entryIds = range.map { _ in UUID().uuidString }
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let stream = FeedlyStreamIds(continuation: continuation, ids: entryIds)
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return stream
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}
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static func getPagingKey(for stream: FeedlyResourceId, continuation: String?) -> String {
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return "\(stream.id)@\(continuation ?? "")"
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}
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func getStreamIds(for resource: FeedlyResourceId, continuation: String?, newerThan: Date?, unreadOnly: Bool?, completionHandler: @escaping (Result<FeedlyStreamIds, Error>) -> ()) {
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let key = TestGetPagedStreamIdsService.getPagingKey(for: resource, continuation: continuation)
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guard let page = pages[key] else {
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XCTFail("Missing page for \(resource.id) and continuation \(String(describing: continuation)). Test may time out because the completion will not be called.")
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return
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}
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parameterTester?(resource, continuation, newerThan, unreadOnly)
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DispatchQueue.main.async {
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completionHandler(.success(page))
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self.getStreamIdsExpectation?.fulfill()
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}
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}
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}
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