Alamofire/Tests/DownloadTests.swift

// DownloadTests.swift
//
// Copyright (c) 2014 Alamofire (http://alamofire.org)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import Foundation
import XCTest

extension Alamofire {
    struct DownloadTests {
        class DownloadResponseTestCase: XCTestCase {
            func testDownloadRequest() {
                let numberOfLines = 100
                let URL = "http://httpbin.org/stream/\(numberOfLines)"

                let expectation = expectationWithDescription(URL)

                Alamofire.download(.GET, URL, destination: Alamofire.Request.suggestedDownloadDestination(directory: .DocumentDirectory, domain: .UserDomainMask))
                    .response { request, response, _, error in
                        expectation.fulfill()

                        XCTAssertNotNil(request, "request should not be nil")
                        XCTAssertNotNil(response, "response should not be nil")

                        XCTAssertNil(error, "error should be nil")

                        let fileManager = NSFileManager.defaultManager()
                        var fileManagerError: NSError?
                        let directory = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)[0] as NSURL
                        let contents = fileManager.contentsOfDirectoryAtURL(directory, includingPropertiesForKeys: nil, options: .SkipsHiddenFiles, error: &fileManagerError) as NSArray

                        XCTAssertNil(fileManagerError, "fileManagerError should be nil")

                        let predicate = NSPredicate(format: "lastPathComponent = '\(numberOfLines)'")
                        let filteredContents = contents.filteredArrayUsingPredicate(predicate)

                        XCTAssertEqual(filteredContents.count, 1, "should have one file in Documents")

                        let file = filteredContents[0] as NSURL
                        XCTAssertEqual(file.lastPathComponent!, "\(numberOfLines)", "filename should be \(numberOfLines)")

                        let data = NSData(contentsOfURL: file)
                        XCTAssertGreaterThan(data.length, 0, "data length should be non-zero")
                }

                waitForExpectationsWithTimeout(10){ error in
                    XCTAssertNil(error, "\(error)")
                }
            }
        }
    }
}