How to use with class

...4// Copyright (c) 2015-2016 Damien (http://delba.io)5//6// Permission is hereby granted, free of charge, to any person obtaining a copy7// of this software and associated documentation files (the "Software"), to deal8// in the Software without restriction, including without limitation the rights9// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell10// copies of the Software, and to permit persons to whom the Software is11// furnished to do so, subject to the following conditions:12//13// The above copyright notice and this permission notice shall be included in all14// copies or substantial portions of the Software.15//16// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR17// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,18// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE19// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER20// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,21// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE22// SOFTWARE.23//24// MARK: - JSONKey25private enum KeyType {26    case String(Swift.String)27    case Int(Swift.Int)28    case Path([Any])29}30public class JSONKeys {31    private init() {}32}33public class JSONKey<ValueType>: JSONKeys {34    private let type: KeyType35    36    /**37     Creates a new instance of JSONKey.38     39     - parameter key: A string.40     41     - returns: A new instance of JSONKey.42     */43    public init(_ key: String) {44        self.type = .String(key)45    }46    47    /**48     Creates a new instance of JSONKey.49     50     - parameter key: An integer.51     52     - returns: A new instance of JSONKey.53     */54    public init(_ key: Int) {55        self.type = .Int(key)56    }57    58    /**59     Creates a new instance of JSONKey.60     61     - parameter key: Any62     63     - returns: A new instance of JSONKey.64     */65    public init(path indexes: Any...) {66        self.type = .Path(indexes)67    }68}69private extension JSON {70    subscript(type: KeyType) -> JSON {71        switch type {72        case .String(let key): return self[key]73        case .Int(let key): return self[key]74        case .Path(let indexes): return self[indexes]75        }76    }77}78// MARK: - JSON79extension JSON {80    /**81     Returns the value associated with the given key as JSON.82     83     - parameter key: The key.84     85     - returns: The value associated with the given key as JSON.86     */87    public subscript(key: JSONKey<JSON>) -> JSON {88        return self[key.type]89    }90}91// MARK: - String92extension JSON {93    /**94     Returns the value associated with the given key as a string or nil if not present/convertible.95     96     - parameter key: The key.97     98     - returns: The value associated with the given key as a string or nil if not present/convertible.99     */100    public subscript(key: JSONKey<String?>) -> String? {101        return self[key.type].string102    }103    104    /**105     Returns the value associated with the given key as a string or "" if not present/convertible.106     107     - parameter key: The key.108     109     - returns: The value associated with the given key as a string or "" if not present/convertible.110     */111    public subscript(key: JSONKey<String>) -> String {112        return self[key.type].stringValue113    }114}115// MARK: - Integer116extension JSON {117    /**118     Returns the value associated with the given key as a 64-bit signed integer or nil if not present/convertible.119     120     - parameter key: The key.121     122     - returns: The value associated with the given key as a 64-bit signed integer or nil if not present/convertible.123     */124    public subscript(key: JSONKey<Int?>) -> Int? {125        return self[key.type].int126    }127    128    /**129     Returns the value associated with the given key as a 64-bit signed integer or 0 if not present/convertible.130     131     - parameter key: The key.132     133     - returns: The value associated with the given key as a 64-bit signed integer or 0 if not present/convertible.134     */135    public subscript(key: JSONKey<Int>) -> Int {136        return self[key.type].intValue137    }138}139// MARK: - FloatingPointType140extension JSON {141    /**142     Returns the value associated with the given key as a 64-bit floating-point number or nil if not present/convertible.143     144     - parameter key: The key.145     146     - returns: The value associated with the given key as a 64-bit floating-point number or nil if not present/convertible.147     */148    public subscript(key: JSONKey<Double?>) -> Double? {149        return self[key.type].double150    }151    152    /**153     Returns the value associated with the given key as a 64-bit floating-point number or 0.0 if not present/convertible.154     155     - parameter key: The key.156     157     - returns: The value associated with the given key as a 64-bit floating-point number or 0.0 if not present/convertible.158     */159    public subscript(key: JSONKey<Double>) -> Double {160        return self[key.type].doubleValue161    }162    163    /**164     Returns the value associated with the given key as a 32-bit floating-point number or nil if not present/convertible.165     166     - parameter key: The key.167     168     - returns: The value associated with the given key as a 32-bit floating-point number or nil if not present/convertible.169     */170    public subscript(key: JSONKey<Float?>) -> Float? {171        return self[key.type].float172    }173    174    /**175     Returns the value associated with the given key as a 32-bit floating-point number or 0.0 if not present/convertible.176     177     - parameter key: The key.178     179     - returns: The value associated with the given key as a 32-bit floating-point number or 0.0 if not present/convertible.180     */181    public subscript(key: JSONKey<Float>) -> Float {182        return self[key.type].floatValue183    }184    185    /**186     Returns the value associated with the given key as a NSNumber or nil if not present/convertible.187     188     - parameter key: The key.189     190     - returns: The value associated with the given key as a NSNumber or nil if not present/convertible.191     */192    public subscript(key: JSONKey<NSNumber?>) -> NSNumber? {193        return self[key.type].nsNumber194    }195    196    /**197     Returns the value associated with the given key as a NSNumber or 0 if not present/convertible.198     199     - parameter key: The key.200     201     - returns: The value associated with the given key as a NSNumber or 0 if not present/convertible.202     */203    public subscript(key: JSONKey<NSNumber>) -> NSNumber {204        return self[key.type].nsNumberValue205    }206    207    /**208     Returns the value associated with the given key as a CGFloat or nil if not present/convertible.209     210     - parameter key: The key.211     212     - returns: The value associated with the given key as a CGFloat or nil if not present/convertible.213     */214    public subscript(key: JSONKey<CGFloat?>) -> CGFloat? {215        return self[key.type].cgFloat216    }217    218    /**219     Returns the value associated with the given key as a CGFloat or 0.0 if not present/convertible.220     221     - parameter key: The key.222     223     - returns: The value associated with the given key as a CGFloat or 0.0 if not present/convertible.224     */225    public subscript(key: JSONKey<CGFloat>) -> CGFloat {226        return self[key.type].cgFloatValue227    }228}229// MARK: - Bool230extension JSON {231    /**232     Returns the value associated with the given key as a Bool or nil if not present/convertible.233     234     - parameter key: The key.235     236     - returns: The value associated with the given key as a Bool or nil if not present/convertible.237     */238    public subscript(key: JSONKey<Bool?>) -> Bool? {239        return self[key.type].bool240    }241    242    /**243     Returns the value associated with the given key as a Bool or false if not present/convertible.244     245     - parameter key: The key.246     247     - returns: The value associated with the given key as a Bool or false if not present/convertible.248     */249    public subscript(key: JSONKey<Bool>) -> Bool {250        return self[key.type].boolValue251    }252}253// MARK: - NSDate254extension JSON {255    /**256     Returns the value associated with the given key as a NSDate or nil if not present/convertible.257     258     - parameter key: The key.259     260     - returns: The value associated with the given key as a NSDate or nil if not present/convertible.261     */262    public subscript(key: JSONKey<NSDate?>) -> NSDate? {263        return self[key.type].nsDate264    }265}266// MARK: - NSURL267extension JSON {268    /**269     Returns the value associated with the given key as a NSURL or nil if not present/convertible.270     271     - parameter key: The key.272     273     - returns: The value associated with the given key as a NSURL or nil if not present/convertible.274     */275    public subscript(key: JSONKey<NSURL?>) -> NSURL? {276        return self[key.type].nsURL277    }278}279// MARK: - Dictionary280extension JSON {281    /**282     Returns the value associated with the given key as a dictionary or nil if not present/convertible.283     284     - parameter key: The key.285     286     - returns: The value associated with the given key as a dictionary or nil if not present/convertible.287     */288    public subscript(key: JSONKey<[String: AnyObject]?>) -> [String: AnyObject]? {289        return self[key.type].dictionary290    }291    292    /**293     Returns the value associated with the given key as a dictionary or an empty dictionary if not present/convertible.294     295     - parameter key: The key.296     297     - returns: The value associated with the given key as a dictionary or an empty dictionary if not present/convertible.298     */299    public subscript(key: JSONKey<[String: AnyObject]>) -> [String: AnyObject] {300        return self[key.type].dictionaryValue301    }302    303    /**304     Returns the value associated with the given key as a dictionary or nil if not present/convertible.305     306     - parameter key: The key.307     308     - returns: The value associated with the given key as a dictionary or nil if not present/convertible.309     */310    public subscript(key: JSONKey<[String: JSON]?>) -> [String: JSON]? {311        return self[key.type].jsonDictionary312    }313    314    /**315     Returns the value associated with the given key as a dictionary or an empty dictionary if not present/convertible.316     317     - parameter key: The key.318     319     - returns: The value associated with the given key as a dictionary or an empty dictionary if not present/convertible.320     */321    public subscript(key: JSONKey<[String: JSON]>) -> [String: JSON] {322        return self[key.type].jsonDictionaryValue323    }324    /**325     Returns the value associated with the given key as a dictionary or nil if not present/convertible.326     327     - parameter key: The key.328     329     - returns: The value associated with the given key as a dictionary or nil if not present/convertible.330     */331    public subscript(key: JSONKey<NSDictionary?>) -> NSDictionary? {332        return self[key.type].nsDictionary333    }334    335    /**336     Returns the value associated with the given key as a NSDictionary or an empty NSDictionary if not present/convertible.337     338     - parameter key: The key.339     340     - returns: The value associated with the given key as a NSDictionary or an empty NSDictionary if not present/convertible.341     */342    public subscript(key: JSONKey<NSDictionary>) -> NSDictionary {343        return self[key.type].nsDictionaryValue344    }345}346// MARK: - Array347extension JSON {348    /**349     Returns the value associated with the given key as an array or nil if not present/convertible.350     351     - parameter key: The key.352     353     - returns: The value associated with the given key as an array or nil if not present/convertible.354     */355    public subscript(key: JSONKey<[AnyObject]?>) -> [AnyObject]? {356        return self[key.type].array357    }358    359    /**360     Returns the value associated with the given key as an array or an empty array if not present/convertible.361     362     - parameter key: The key.363     364     - returns: The value associated with the given key as an array or an empty array if not present/convertible.365     */366    public subscript(key: JSONKey<[AnyObject]>) -> [AnyObject] {367        return self[key.type].arrayValue368    }369    370    /**371     Returns the value associated with the given key as an array or nil if not present/convertible.372     373     - parameter key: The key.374     375     - returns: The value associated with the given key as an array or nil if not present/convertible.376     */377    public subscript(key: JSONKey<[JSON]?>) -> [JSON]? {378        return self[key.type].jsonArray379    }380    381    /**382     Returns the value associated with the given key as an array or an empty array if not present/convertible.383     384     - parameter key: The key.385     386     - returns: The value associated with the given key as an array or an empty array if not present/convertible.387     */388    public subscript(key: JSONKey<[JSON]>) -> [JSON] {389        return self[key.type].jsonArrayValue390    }391    392    /**393     Returns the value associated with the given key as a NSArray or nil if not present/convertible.394     395     - parameter key: The key.396     397     - returns: The value associated with the given key as a NSArray or nil if not present/convertible.398     */399    public subscript(key: JSONKey<NSArray?>) -> NSArray? {400        return self[key.type].nsArray401    }402    403    /**404     Returns the value associated with the given key as a NSArray or an empty NSArray if not present/convertible.405     406     - parameter key: The key.407     408     - returns: The value associated with the given key as a NSArray or an empty NSArray if not present/convertible.409     */410    public subscript(key: JSONKey<NSArray>) -> NSArray {411        return self[key.type].nsArrayValue412    }413}...

...12include ("file.inc");13$file_modes = array("w+", "w+b", "w+t",14                    "a+", "a+b", "a+t",15                    "x+", "x+b", "x+t");16$file_content_types = array("numeric", "text", "text_with_new_line", "alphanumeric");17echo "*** Testing fgets() : usage variations ***\n";18$filename = __DIR__."/fgets_variation4私はガラスを食べられます.tmp";19foreach($file_modes as $file_mode) {20  echo "\n-- Testing fgets() with file opened using mode $file_mode --\n";21  foreach($file_content_types as $file_content_type) {22    echo "-- File content type : $file_content_type --\n";23    /* create files with $file_content_type */24    $file_handle = fopen($filename, $file_mode);25    $data = fill_file($file_handle, $file_content_type, 50);26    if ( !$file_handle ) {27      echo "Error: failed to open file $filename!";28      exit();29    }30    echo "-- fgets() with location set by fseek() with default length --\n";31    var_dump( fseek($file_handle, 5, SEEK_SET) );32    var_dump( ftell($file_handle) );33    var_dump( fgets($file_handle ) );34    var_dump( ftell($file_handle) ); // ensure the file pointer position35    var_dump( feof($file_handle) );  // ensure if eof set36    echo "-- fgets() with location set by fseek() with length = 20 --\n";37    var_dump( fseek($file_handle, 25, SEEK_SET) );38    var_dump( ftell($file_handle) );39    var_dump( fgets($file_handle, 20 ) ); // expected 19 chars40    var_dump( ftell($file_handle) ); // ensure the file pointer position41    var_dump( feof($file_handle) );  // ensure if eof set42    //close file43    fclose($file_handle);44    // delete file45    delete_file($filename);46  } // file_content_type loop47} // file_mode loop48echo "Done\n";49?>50--EXPECT--51*** Testing fgets() : usage variations ***52-- Testing fgets() with file opened using mode w+ --53-- File content type : numeric --54-- fgets() with location set by fseek() with default length --55int(0)56int(5)57string(45) "222222222222222222222222222222222222222222222"58int(50)59bool(true)60-- fgets() with location set by fseek() with length = 20 --61int(0)62int(25)63string(19) "2222222222222222222"64int(44)65bool(false)66-- File content type : text --67-- fgets() with location set by fseek() with default length --68int(0)69int(5)70string(45) "text text text text text text text text text "71int(50)72bool(true)73-- fgets() with location set by fseek() with length = 20 --74int(0)75int(25)76string(19) "text text text text"77int(44)78bool(false)79-- File content type : text_with_new_line --80-- fgets() with location set by fseek() with default length --81int(0)82int(5)83string(13) "line of text84"85int(18)86bool(false)87-- fgets() with location set by fseek() with length = 20 --88int(0)89int(25)90string(11) "ne of text91"92int(36)93bool(false)94-- File content type : alphanumeric --95-- fgets() with location set by fseek() with default length --96int(0)97int(5)98string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "99int(50)100bool(true)101-- fgets() with location set by fseek() with length = 20 --102int(0)103int(25)104string(19) "ab12 ab12 ab12 ab12"105int(44)106bool(false)107-- Testing fgets() with file opened using mode w+b --108-- File content type : numeric --109-- fgets() with location set by fseek() with default length --110int(0)111int(5)112string(45) "222222222222222222222222222222222222222222222"113int(50)114bool(true)115-- fgets() with location set by fseek() with length = 20 --116int(0)117int(25)118string(19) "2222222222222222222"119int(44)120bool(false)121-- File content type : text --122-- fgets() with location set by fseek() with default length --123int(0)124int(5)125string(45) "text text text text text text text text text "126int(50)127bool(true)128-- fgets() with location set by fseek() with length = 20 --129int(0)130int(25)131string(19) "text text text text"132int(44)133bool(false)134-- File content type : text_with_new_line --135-- fgets() with location set by fseek() with default length --136int(0)137int(5)138string(13) "line of text139"140int(18)141bool(false)142-- fgets() with location set by fseek() with length = 20 --143int(0)144int(25)145string(11) "ne of text146"147int(36)148bool(false)149-- File content type : alphanumeric --150-- fgets() with location set by fseek() with default length --151int(0)152int(5)153string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "154int(50)155bool(true)156-- fgets() with location set by fseek() with length = 20 --157int(0)158int(25)159string(19) "ab12 ab12 ab12 ab12"160int(44)161bool(false)162-- Testing fgets() with file opened using mode w+t --163-- File content type : numeric --164-- fgets() with location set by fseek() with default length --165int(0)166int(5)167string(45) "222222222222222222222222222222222222222222222"168int(50)169bool(true)170-- fgets() with location set by fseek() with length = 20 --171int(0)172int(25)173string(19) "2222222222222222222"174int(44)175bool(false)176-- File content type : text --177-- fgets() with location set by fseek() with default length --178int(0)179int(5)180string(45) "text text text text text text text text text "181int(50)182bool(true)183-- fgets() with location set by fseek() with length = 20 --184int(0)185int(25)186string(19) "text text text text"187int(44)188bool(false)189-- File content type : text_with_new_line --190-- fgets() with location set by fseek() with default length --191int(0)192int(5)193string(1) "194"195int(6)196bool(false)197-- fgets() with location set by fseek() with length = 20 --198int(0)199int(25)200string(12) "ine of text201"202int(37)203bool(false)204-- File content type : alphanumeric --205-- fgets() with location set by fseek() with default length --206int(0)207int(5)208string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "209int(50)210bool(true)211-- fgets() with location set by fseek() with length = 20 --212int(0)213int(25)214string(19) "ab12 ab12 ab12 ab12"215int(44)216bool(false)217-- Testing fgets() with file opened using mode a+ --218-- File content type : numeric --219-- fgets() with location set by fseek() with default length --220int(0)221int(5)222string(45) "222222222222222222222222222222222222222222222"223int(50)224bool(true)225-- fgets() with location set by fseek() with length = 20 --226int(0)227int(25)228string(19) "2222222222222222222"229int(44)230bool(false)231-- File content type : text --232-- fgets() with location set by fseek() with default length --233int(0)234int(5)235string(45) "text text text text text text text text text "236int(50)237bool(true)238-- fgets() with location set by fseek() with length = 20 --239int(0)240int(25)241string(19) "text text text text"242int(44)243bool(false)244-- File content type : text_with_new_line --245-- fgets() with location set by fseek() with default length --246int(0)247int(5)248string(13) "line of text249"250int(18)251bool(false)252-- fgets() with location set by fseek() with length = 20 --253int(0)254int(25)255string(11) "ne of text256"257int(36)258bool(false)259-- File content type : alphanumeric --260-- fgets() with location set by fseek() with default length --261int(0)262int(5)263string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "264int(50)265bool(true)266-- fgets() with location set by fseek() with length = 20 --267int(0)268int(25)269string(19) "ab12 ab12 ab12 ab12"270int(44)271bool(false)272-- Testing fgets() with file opened using mode a+b --273-- File content type : numeric --274-- fgets() with location set by fseek() with default length --275int(0)276int(5)277string(45) "222222222222222222222222222222222222222222222"278int(50)279bool(true)280-- fgets() with location set by fseek() with length = 20 --281int(0)282int(25)283string(19) "2222222222222222222"284int(44)285bool(false)286-- File content type : text --287-- fgets() with location set by fseek() with default length --288int(0)289int(5)290string(45) "text text text text text text text text text "291int(50)292bool(true)293-- fgets() with location set by fseek() with length = 20 --294int(0)295int(25)296string(19) "text text text text"297int(44)298bool(false)299-- File content type : text_with_new_line --300-- fgets() with location set by fseek() with default length --301int(0)302int(5)303string(13) "line of text304"305int(18)306bool(false)307-- fgets() with location set by fseek() with length = 20 --308int(0)309int(25)310string(11) "ne of text311"312int(36)313bool(false)314-- File content type : alphanumeric --315-- fgets() with location set by fseek() with default length --316int(0)317int(5)318string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "319int(50)320bool(true)321-- fgets() with location set by fseek() with length = 20 --322int(0)323int(25)324string(19) "ab12 ab12 ab12 ab12"325int(44)326bool(false)327-- Testing fgets() with file opened using mode a+t --328-- File content type : numeric --329-- fgets() with location set by fseek() with default length --330int(0)331int(5)332string(45) "222222222222222222222222222222222222222222222"333int(50)334bool(true)335-- fgets() with location set by fseek() with length = 20 --336int(0)337int(25)338string(19) "2222222222222222222"339int(44)340bool(false)341-- File content type : text --342-- fgets() with location set by fseek() with default length --343int(0)344int(5)345string(45) "text text text text text text text text text "346int(50)347bool(true)348-- fgets() with location set by fseek() with length = 20 --349int(0)350int(25)351string(19) "text text text text"352int(44)353bool(false)354-- File content type : text_with_new_line --355-- fgets() with location set by fseek() with default length --356int(0)357int(5)358string(1) "359"360int(6)361bool(false)362-- fgets() with location set by fseek() with length = 20 --363int(0)364int(25)365string(12) "ine of text366"367int(37)368bool(false)369-- File content type : alphanumeric --370-- fgets() with location set by fseek() with default length --371int(0)372int(5)373string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "374int(50)375bool(true)376-- fgets() with location set by fseek() with length = 20 --377int(0)378int(25)379string(19) "ab12 ab12 ab12 ab12"380int(44)381bool(false)382-- Testing fgets() with file opened using mode x+ --383-- File content type : numeric --384-- fgets() with location set by fseek() with default length --385int(0)386int(5)387string(45) "222222222222222222222222222222222222222222222"388int(50)389bool(true)390-- fgets() with location set by fseek() with length = 20 --391int(0)392int(25)393string(19) "2222222222222222222"394int(44)395bool(false)396-- File content type : text --397-- fgets() with location set by fseek() with default length --398int(0)399int(5)400string(45) "text text text text text text text text text "401int(50)402bool(true)403-- fgets() with location set by fseek() with length = 20 --404int(0)405int(25)406string(19) "text text text text"407int(44)408bool(false)409-- File content type : text_with_new_line --410-- fgets() with location set by fseek() with default length --411int(0)412int(5)413string(13) "line of text414"415int(18)416bool(false)417-- fgets() with location set by fseek() with length = 20 --418int(0)419int(25)420string(11) "ne of text421"422int(36)423bool(false)424-- File content type : alphanumeric --425-- fgets() with location set by fseek() with default length --426int(0)427int(5)428string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "429int(50)430bool(true)431-- fgets() with location set by fseek() with length = 20 --432int(0)433int(25)434string(19) "ab12 ab12 ab12 ab12"435int(44)436bool(false)437-- Testing fgets() with file opened using mode x+b --438-- File content type : numeric --439-- fgets() with location set by fseek() with default length --440int(0)441int(5)442string(45) "222222222222222222222222222222222222222222222"443int(50)444bool(true)445-- fgets() with location set by fseek() with length = 20 --446int(0)447int(25)448string(19) "2222222222222222222"449int(44)450bool(false)451-- File content type : text --452-- fgets() with location set by fseek() with default length --453int(0)454int(5)455string(45) "text text text text text text text text text "456int(50)457bool(true)458-- fgets() with location set by fseek() with length = 20 --459int(0)460int(25)461string(19) "text text text text"462int(44)463bool(false)464-- File content type : text_with_new_line --465-- fgets() with location set by fseek() with default length --466int(0)467int(5)468string(13) "line of text469"470int(18)471bool(false)472-- fgets() with location set by fseek() with length = 20 --473int(0)474int(25)475string(11) "ne of text476"477int(36)478bool(false)479-- File content type : alphanumeric --480-- fgets() with location set by fseek() with default length --481int(0)482int(5)483string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "484int(50)485bool(true)486-- fgets() with location set by fseek() with length = 20 --487int(0)488int(25)489string(19) "ab12 ab12 ab12 ab12"490int(44)491bool(false)492-- Testing fgets() with file opened using mode x+t --493-- File content type : numeric --494-- fgets() with location set by fseek() with default length --495int(0)496int(5)497string(45) "222222222222222222222222222222222222222222222"498int(50)499bool(true)500-- fgets() with location set by fseek() with length = 20 --501int(0)502int(25)503string(19) "2222222222222222222"504int(44)505bool(false)506-- File content type : text --507-- fgets() with location set by fseek() with default length --508int(0)509int(5)510string(45) "text text text text text text text text text "511int(50)512bool(true)513-- fgets() with location set by fseek() with length = 20 --514int(0)515int(25)516string(19) "text text text text"517int(44)518bool(false)519-- File content type : text_with_new_line --520-- fgets() with location set by fseek() with default length --521int(0)522int(5)523string(1) "524"525int(6)526bool(false)527-- fgets() with location set by fseek() with length = 20 --528int(0)529int(25)530string(12) "ine of text531"532int(37)533bool(false)534-- File content type : alphanumeric --535-- fgets() with location set by fseek() with default length --536int(0)537int(5)538string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "539int(50)540bool(true)541-- fgets() with location set by fseek() with length = 20 --542int(0)543int(25)544string(19) "ab12 ab12 ab12 ab12"545int(44)546bool(false)547Done...

...12include ("file.inc");13$file_modes = array("w+", "w+b", "w+t",14                    "a+", "a+b", "a+t",15                    "x+", "x+b", "x+t");16$file_content_types = array("numeric", "text", "text_with_new_line", "alphanumeric");17echo "*** Testing fgets() : usage variations ***\n";18$filename = __DIR__."/fgets_variation4.tmp";19foreach($file_modes as $file_mode) {20  echo "\n-- Testing fgets() with file opened using mode $file_mode --\n";21  foreach($file_content_types as $file_content_type) {22    echo "-- File content type : $file_content_type --\n";23    /* create files with $file_content_type */24    $file_handle = fopen($filename, $file_mode);25    $data = fill_file($file_handle, $file_content_type, 50);26    if ( !$file_handle ) {27      echo "Error: failed to open file $filename!";28      exit();29    }30    echo "-- fgets() with location set by fseek() with default length --\n";31    var_dump( fseek($file_handle, 5, SEEK_SET) );32    var_dump( ftell($file_handle) );33    var_dump( fgets($file_handle ) );34    var_dump( ftell($file_handle) ); // ensure the file pointer position35    var_dump( feof($file_handle) );  // ensure if eof set36    echo "-- fgets() with location set by fseek() with length = 20 --\n";37    var_dump( fseek($file_handle, 25, SEEK_SET) );38    var_dump( ftell($file_handle) );39    var_dump( fgets($file_handle, 20 ) ); // expected 19 chars40    var_dump( ftell($file_handle) ); // ensure the file pointer position41    var_dump( feof($file_handle) );  // ensure if eof set42    //close file43    fclose($file_handle);44    // delete file45    delete_file($filename);46  } // file_content_type loop47} // file_mode loop48echo "Done\n";49?>50--EXPECT--51*** Testing fgets() : usage variations ***52-- Testing fgets() with file opened using mode w+ --53-- File content type : numeric --54-- fgets() with location set by fseek() with default length --55int(0)56int(5)57string(45) "222222222222222222222222222222222222222222222"58int(50)59bool(true)60-- fgets() with location set by fseek() with length = 20 --61int(0)62int(25)63string(19) "2222222222222222222"64int(44)65bool(false)66-- File content type : text --67-- fgets() with location set by fseek() with default length --68int(0)69int(5)70string(45) "text text text text text text text text text "71int(50)72bool(true)73-- fgets() with location set by fseek() with length = 20 --74int(0)75int(25)76string(19) "text text text text"77int(44)78bool(false)79-- File content type : text_with_new_line --80-- fgets() with location set by fseek() with default length --81int(0)82int(5)83string(13) "line of text84"85int(18)86bool(false)87-- fgets() with location set by fseek() with length = 20 --88int(0)89int(25)90string(11) "ne of text91"92int(36)93bool(false)94-- File content type : alphanumeric --95-- fgets() with location set by fseek() with default length --96int(0)97int(5)98string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "99int(50)100bool(true)101-- fgets() with location set by fseek() with length = 20 --102int(0)103int(25)104string(19) "ab12 ab12 ab12 ab12"105int(44)106bool(false)107-- Testing fgets() with file opened using mode w+b --108-- File content type : numeric --109-- fgets() with location set by fseek() with default length --110int(0)111int(5)112string(45) "222222222222222222222222222222222222222222222"113int(50)114bool(true)115-- fgets() with location set by fseek() with length = 20 --116int(0)117int(25)118string(19) "2222222222222222222"119int(44)120bool(false)121-- File content type : text --122-- fgets() with location set by fseek() with default length --123int(0)124int(5)125string(45) "text text text text text text text text text "126int(50)127bool(true)128-- fgets() with location set by fseek() with length = 20 --129int(0)130int(25)131string(19) "text text text text"132int(44)133bool(false)134-- File content type : text_with_new_line --135-- fgets() with location set by fseek() with default length --136int(0)137int(5)138string(13) "line of text139"140int(18)141bool(false)142-- fgets() with location set by fseek() with length = 20 --143int(0)144int(25)145string(11) "ne of text146"147int(36)148bool(false)149-- File content type : alphanumeric --150-- fgets() with location set by fseek() with default length --151int(0)152int(5)153string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "154int(50)155bool(true)156-- fgets() with location set by fseek() with length = 20 --157int(0)158int(25)159string(19) "ab12 ab12 ab12 ab12"160int(44)161bool(false)162-- Testing fgets() with file opened using mode w+t --163-- File content type : numeric --164-- fgets() with location set by fseek() with default length --165int(0)166int(5)167string(45) "222222222222222222222222222222222222222222222"168int(50)169bool(true)170-- fgets() with location set by fseek() with length = 20 --171int(0)172int(25)173string(19) "2222222222222222222"174int(44)175bool(false)176-- File content type : text --177-- fgets() with location set by fseek() with default length --178int(0)179int(5)180string(45) "text text text text text text text text text "181int(50)182bool(true)183-- fgets() with location set by fseek() with length = 20 --184int(0)185int(25)186string(19) "text text text text"187int(44)188bool(false)189-- File content type : text_with_new_line --190-- fgets() with location set by fseek() with default length --191int(0)192int(5)193string(13) "line of text194"195int(18)196bool(false)197-- fgets() with location set by fseek() with length = 20 --198int(0)199int(25)200string(11) "ne of text201"202int(36)203bool(false)204-- File content type : alphanumeric --205-- fgets() with location set by fseek() with default length --206int(0)207int(5)208string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "209int(50)210bool(true)211-- fgets() with location set by fseek() with length = 20 --212int(0)213int(25)214string(19) "ab12 ab12 ab12 ab12"215int(44)216bool(false)217-- Testing fgets() with file opened using mode a+ --218-- File content type : numeric --219-- fgets() with location set by fseek() with default length --220int(0)221int(5)222string(45) "222222222222222222222222222222222222222222222"223int(50)224bool(true)225-- fgets() with location set by fseek() with length = 20 --226int(0)227int(25)228string(19) "2222222222222222222"229int(44)230bool(false)231-- File content type : text --232-- fgets() with location set by fseek() with default length --233int(0)234int(5)235string(45) "text text text text text text text text text "236int(50)237bool(true)238-- fgets() with location set by fseek() with length = 20 --239int(0)240int(25)241string(19) "text text text text"242int(44)243bool(false)244-- File content type : text_with_new_line --245-- fgets() with location set by fseek() with default length --246int(0)247int(5)248string(13) "line of text249"250int(18)251bool(false)252-- fgets() with location set by fseek() with length = 20 --253int(0)254int(25)255string(11) "ne of text256"257int(36)258bool(false)259-- File content type : alphanumeric --260-- fgets() with location set by fseek() with default length --261int(0)262int(5)263string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "264int(50)265bool(true)266-- fgets() with location set by fseek() with length = 20 --267int(0)268int(25)269string(19) "ab12 ab12 ab12 ab12"270int(44)271bool(false)272-- Testing fgets() with file opened using mode a+b --273-- File content type : numeric --274-- fgets() with location set by fseek() with default length --275int(0)276int(5)277string(45) "222222222222222222222222222222222222222222222"278int(50)279bool(true)280-- fgets() with location set by fseek() with length = 20 --281int(0)282int(25)283string(19) "2222222222222222222"284int(44)285bool(false)286-- File content type : text --287-- fgets() with location set by fseek() with default length --288int(0)289int(5)290string(45) "text text text text text text text text text "291int(50)292bool(true)293-- fgets() with location set by fseek() with length = 20 --294int(0)295int(25)296string(19) "text text text text"297int(44)298bool(false)299-- File content type : text_with_new_line --300-- fgets() with location set by fseek() with default length --301int(0)302int(5)303string(13) "line of text304"305int(18)306bool(false)307-- fgets() with location set by fseek() with length = 20 --308int(0)309int(25)310string(11) "ne of text311"312int(36)313bool(false)314-- File content type : alphanumeric --315-- fgets() with location set by fseek() with default length --316int(0)317int(5)318string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "319int(50)320bool(true)321-- fgets() with location set by fseek() with length = 20 --322int(0)323int(25)324string(19) "ab12 ab12 ab12 ab12"325int(44)326bool(false)327-- Testing fgets() with file opened using mode a+t --328-- File content type : numeric --329-- fgets() with location set by fseek() with default length --330int(0)331int(5)332string(45) "222222222222222222222222222222222222222222222"333int(50)334bool(true)335-- fgets() with location set by fseek() with length = 20 --336int(0)337int(25)338string(19) "2222222222222222222"339int(44)340bool(false)341-- File content type : text --342-- fgets() with location set by fseek() with default length --343int(0)344int(5)345string(45) "text text text text text text text text text "346int(50)347bool(true)348-- fgets() with location set by fseek() with length = 20 --349int(0)350int(25)351string(19) "text text text text"352int(44)353bool(false)354-- File content type : text_with_new_line --355-- fgets() with location set by fseek() with default length --356int(0)357int(5)358string(13) "line of text359"360int(18)361bool(false)362-- fgets() with location set by fseek() with length = 20 --363int(0)364int(25)365string(11) "ne of text366"367int(36)368bool(false)369-- File content type : alphanumeric --370-- fgets() with location set by fseek() with default length --371int(0)372int(5)373string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "374int(50)375bool(true)376-- fgets() with location set by fseek() with length = 20 --377int(0)378int(25)379string(19) "ab12 ab12 ab12 ab12"380int(44)381bool(false)382-- Testing fgets() with file opened using mode x+ --383-- File content type : numeric --384-- fgets() with location set by fseek() with default length --385int(0)386int(5)387string(45) "222222222222222222222222222222222222222222222"388int(50)389bool(true)390-- fgets() with location set by fseek() with length = 20 --391int(0)392int(25)393string(19) "2222222222222222222"394int(44)395bool(false)396-- File content type : text --397-- fgets() with location set by fseek() with default length --398int(0)399int(5)400string(45) "text text text text text text text text text "401int(50)402bool(true)403-- fgets() with location set by fseek() with length = 20 --404int(0)405int(25)406string(19) "text text text text"407int(44)408bool(false)409-- File content type : text_with_new_line --410-- fgets() with location set by fseek() with default length --411int(0)412int(5)413string(13) "line of text414"415int(18)416bool(false)417-- fgets() with location set by fseek() with length = 20 --418int(0)419int(25)420string(11) "ne of text421"422int(36)423bool(false)424-- File content type : alphanumeric --425-- fgets() with location set by fseek() with default length --426int(0)427int(5)428string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "429int(50)430bool(true)431-- fgets() with location set by fseek() with length = 20 --432int(0)433int(25)434string(19) "ab12 ab12 ab12 ab12"435int(44)436bool(false)437-- Testing fgets() with file opened using mode x+b --438-- File content type : numeric --439-- fgets() with location set by fseek() with default length --440int(0)441int(5)442string(45) "222222222222222222222222222222222222222222222"443int(50)444bool(true)445-- fgets() with location set by fseek() with length = 20 --446int(0)447int(25)448string(19) "2222222222222222222"449int(44)450bool(false)451-- File content type : text --452-- fgets() with location set by fseek() with default length --453int(0)454int(5)455string(45) "text text text text text text text text text "456int(50)457bool(true)458-- fgets() with location set by fseek() with length = 20 --459int(0)460int(25)461string(19) "text text text text"462int(44)463bool(false)464-- File content type : text_with_new_line --465-- fgets() with location set by fseek() with default length --466int(0)467int(5)468string(13) "line of text469"470int(18)471bool(false)472-- fgets() with location set by fseek() with length = 20 --473int(0)474int(25)475string(11) "ne of text476"477int(36)478bool(false)479-- File content type : alphanumeric --480-- fgets() with location set by fseek() with default length --481int(0)482int(5)483string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "484int(50)485bool(true)486-- fgets() with location set by fseek() with length = 20 --487int(0)488int(25)489string(19) "ab12 ab12 ab12 ab12"490int(44)491bool(false)492-- Testing fgets() with file opened using mode x+t --493-- File content type : numeric --494-- fgets() with location set by fseek() with default length --495int(0)496int(5)497string(45) "222222222222222222222222222222222222222222222"498int(50)499bool(true)500-- fgets() with location set by fseek() with length = 20 --501int(0)502int(25)503string(19) "2222222222222222222"504int(44)505bool(false)506-- File content type : text --507-- fgets() with location set by fseek() with default length --508int(0)509int(5)510string(45) "text text text text text text text text text "511int(50)512bool(true)513-- fgets() with location set by fseek() with length = 20 --514int(0)515int(25)516string(19) "text text text text"517int(44)518bool(false)519-- File content type : text_with_new_line --520-- fgets() with location set by fseek() with default length --521int(0)522int(5)523string(13) "line of text524"525int(18)526bool(false)527-- fgets() with location set by fseek() with length = 20 --528int(0)529int(25)530string(11) "ne of text531"532int(36)533bool(false)534-- File content type : alphanumeric --535-- fgets() with location set by fseek() with default length --536int(0)537int(5)538string(45) "ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 ab12 "539int(50)540bool(true)541-- fgets() with location set by fseek() with length = 20 --542int(0)543int(25)544string(19) "ab12 ab12 ab12 ab12"545int(44)546bool(false)547Done...

...4// Copyright (c) 2015-2016 Damien (http://delba.io)5//6// Permission is hereby granted, free of charge, to any person obtaining a copy7// of this software and associated documentation files (the "Software"), to deal8// in the Software without restriction, including without limitation the rights9// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell10// copies of the Software, and to permit persons to whom the Software is11// furnished to do so, subject to the following conditions:12//13// The above copyright notice and this permission notice shall be included in all14// copies or substantial portions of the Software.15//16// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR17// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,18// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE19// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER20// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,21// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE22// SOFTWARE.23//24import JASON25// MARK: - Signed Integers26extension JSON {27    /**28     Returns the value associated with the given key as a 8-bit signed integer or nil if not present/convertible.29     30     - parameter key: The key.31     32     - returns: The value associated with the given key as a 8-bit signed integer or nil if not present/convertible.33     */34    public subscript(key: JSONKey<Int8?>) -> Int8? {35        return self[key.type].int836    }37    38    /**39     Returns the value associated with the given key as a 8-bit signed integer or 0 if not present/convertible.40     41     - parameter key: The key.42     43     - returns: The value associated with the given key as a 8-bit signed integer or 0 if not present/convertible.44     */45    public subscript(key: JSONKey<Int8>) -> Int8 {46        return self[key.type].int8Value47    }48    49    /**50     Returns the value associated with the given key as a 16-bit signed integer or nil if not present/convertible.51     52     - parameter key: The key.53     54     - returns: The value associated with the given key as a 16-bit signed integer or nil if not present/convertible.55     */56    public subscript(key: JSONKey<Int16?>) -> Int16? {57        return self[key.type].int1658    }59    60    /**61     Returns the value associated with the given key as a 16-bit signed integer or 0 if not present/convertible.62     63     - parameter key: The key.64     65     - returns: The value associated with the given key as a 16-bit signed integer or 0 if not present/convertible.66     */67    public subscript(key: JSONKey<Int16>) -> Int16 {68        return self[key.type].int16Value69    }70    71    /**72     Returns the value associated with the given key as a 32-bit signed integer or nil if not present/convertible.73     74     - parameter key: The key.75     76     - returns: The value associated with the given key as a 32-bit signed integer or nil if not present/convertible.77     */78    public subscript(key: JSONKey<Int32?>) -> Int32? {79        return self[key.type].int3280    }81    82    /**83     Returns the value associated with the given key as a 32-bit signed integer or 0 if not present/convertible.84     85     - parameter key: The key.86     87     - returns: The value associated with the given key as a 32-bit signed integer or 0 if not present/convertible.88     */89    public subscript(key: JSONKey<Int32>) -> Int32 {90        return self[key.type].int32Value91    }92    93    /**94     Returns the value associated with the given key as a 64-bit signed integer or nil if not present/convertible.95     96     - parameter key: The key.97     98     - returns: The value associated with the given key as a 64-bit signed integer or nil if not present/convertible.99     */100    public subscript(key: JSONKey<Int64?>) -> Int64? {101        return self[key.type].int64102    }103    104    /**105     Returns the value associated with the given key as a 64-bit signed integer or 0 if not present/convertible.106     107     - parameter key: The key.108     109     - returns: The value associated with the given key as a 64-bit signed integer or 0 if not present/convertible.110     */111    public subscript(key: JSONKey<Int64>) -> Int64 {112        return self[key.type].int64Value113    }114}115// MARK: - Unsigned Integers116extension JSON {117    /**118     Returns the value associated with the given key as a 64-bit unsigned integer or nil if not present/convertible.119     120     - parameter key: The key.121     122     - returns: The value associated with the given key as a 64-bit unsigned integer or nil if not present/convertible.123     */124    public subscript(key: JSONKey<UInt?>) -> UInt? {125        return self[key.type].uInt126    }127    128    /**129     Returns the value associated with the given key as a 64-bit unsigned integer or 0 if not present/convertible.130     131     - parameter key: The key.132     133     - returns: The value associated with the given key as a 64-bit unsigned integer or 0 if not present/convertible.134     */135    public subscript(key: JSONKey<UInt>) -> UInt {136        return self[key.type].uIntValue137    }138    139    /**140     Returns the value associated with the given key as a 8-bit unsigned integer or nil if not present/convertible.141     142     - parameter key: The key.143     144     - returns: The value associated with the given key as a 8-bit unsigned integer or nil if not present/convertible.145     */146    public subscript(key: JSONKey<UInt8?>) -> UInt8? {147        return self[key.type].uInt8148    }149    150    /**151     Returns the value associated with the given key as a 8-bit unsigned integer or 0 if not present/convertible.152     153     - parameter key: The key.154     155     - returns: The value associated with the given key as a 8-bit unsigned integer or 0 if not present/convertible.156     */157    public subscript(key: JSONKey<UInt8>) -> UInt8 {158        return self[key.type].uInt8Value159    }160    161    /**162     Returns the value associated with the given key as a 16-bit unsigned integer or nil if not present/convertible.163     164     - parameter key: The key.165     166     - returns: The value associated with the given key as a 16-bit unsigned integer or nil if not present/convertible.167     */168    public subscript(key: JSONKey<UInt16?>) -> UInt16? {169        return self[key.type].uInt16170    }171    172    /**173     Returns the value associated with the given key as a 16-bit unsigned integer or 0 if not present/convertible.174     175     - parameter key: The key.176     177     - returns: The value associated with the given key as a 16-bit unsigned integer or 0 if not present/convertible.178     */179    public subscript(key: JSONKey<UInt16>) -> UInt16 {180        return self[key.type].uInt16Value181    }182    183    /**184     Returns the value associated with the given key as a 32-bit unsigned integer or nil if not present/convertible.185     186     - parameter key: The key.187     188     - returns: The value associated with the given key as a 32-bit unsigned integer or nil if not present/convertible.189     */190    public subscript(key: JSONKey<UInt32?>) -> UInt32? {191        return self[key.type].uInt32192    }193    194    /**195     Returns the value associated with the given key as a 32-bit unsigned integer or 0 if not present/convertible.196     197     - parameter key: The key.198     199     - returns: The value associated with the given key as a 32-bit unsigned integer or 0 if not present/convertible.200     */201    public subscript(key: JSONKey<UInt32>) -> UInt32 {202        return self[key.type].uInt32Value203    }204    205    /**206     Returns the value associated with the given key as a 64-bit unsigned integer or nil if not present/convertible.207     208     - parameter key: The key.209     210     - returns: The value associated with the given key as a 64-bit unsigned integer or nil if not present/convertible.211     */212    public subscript(key: JSONKey<UInt64?>) -> UInt64? {213        return self[key.type].uInt64214    }215    216    /**217     Returns the value associated with the given key as a 64-bit unsigned integer or 0 if not present/convertible.218     219     - parameter key: The key.220     221     - returns: The value associated with the given key as a 64-bit unsigned integer or 0 if not present/convertible.222     */223    public subscript(key: JSONKey<UInt64>) -> UInt64 {224        return self[key.type].uInt64Value225    }226}...

...36        }37        func didFinishDownloadTask(_ task: URLSessionDownloadTask, to location: URL, sender: Downloader) {38            didFinishExpectation?.fulfill()39        }40        func didFailDownloadTask(_ task: URLSessionTask, with error: Error?, sender: Downloader) {41            didFailExpectation?.fulfill()42        }43    }44    // MARK: Properties45    let downloader = Downloader(configuration: .default)46    let url1: URL = "https://httpbin.org/image/png"47    let url2: URL = "https://httpbin.org/image/jpeg"48    let url3: URL = "https://test.test"49    // MARK: Setup50    override func setUp() {51        super.setUp()52        downloader.delegate = self53    }54    // MARK: Tests55    func testStartAndStopDownload() {56        downloader.start(with: url1)57        XCTAssertEqual(downloader.items.count, 1, "Should have 1 item.")58        XCTAssertNotNil(downloader.item(with: url1), "Should be able to find item with url.")59        XCTAssertEqual(downloader.tasks.count, 1, "Should have 1 download task.")60        XCTAssertNotNil(downloader.task(with: url1), "Should be able to find task with url.")61        let item2 = Item(url: url2)62        item2.startDownload(with: downloader)63        XCTAssertEqual(downloader.items.count, 2, "Should have 2 download items.")64        XCTAssertNotNil(downloader.item(with: url2), "Should be able to find item with url.")65        XCTAssertEqual(downloader.tasks.count, 2, "Should have 2 download tasks.")66        XCTAssertNotNil(downloader.task(with: url2), "Should be able to find task with url.")67        downloader.stop(for: url1)68        XCTAssertEqual(downloader.items.count, 1, "Should have 1 item.")69        XCTAssertNil(downloader.item(with: url1), "Should not be able to find item with url.")70        XCTAssertEqual(downloader.tasks.count, 1, "Should have 1 download task.")71        XCTAssertNil(downloader.task(with: url1), "Should not be able to find task with url.")72        item2.stopDownload(with: downloader)73        XCTAssertEqual(downloader.items.count, 0, "Should have 0 download items.")74        XCTAssertNil(downloader.item(with: url2), "Should not be able to find item with url.")75        XCTAssertEqual(downloader.tasks.count, 0, "Should have 0 download tasks.")76        XCTAssertNil(downloader.task(with: url2), "Should not be able to find task with url.")77    }78    var downloadFinishedExpectation: XCTestExpectation?79    func testDownloadFinished() {80        downloadFinishedExpectation = expectation(description: "Download Finished")81        downloadFinishedExpectation?.assertForOverFulfill = false82        downloader.start(with: url1)83        wait(for: [downloadFinishedExpectation!], timeout: 5)84        var item = Item(url: url2)85        item.didStartExpectation = expectation(description: "Item Started Download")86        item.didUpdateExpectation = expectation(description: "Item Updated Download")87        item.didUpdateExpectation?.assertForOverFulfill = false88        item.didFinishExpectation = expectation(description: "Item Finished Download")89        item.startDownload(with: downloader)90        let expectations = [item.didStartExpectation!, item.didUpdateExpectation!, item.didFinishExpectation!]91        wait(for: expectations, timeout: 5)92    }93    var downloadFailedExpectation: XCTestExpectation?94    func testDownloadFailed() {95        downloadFailedExpectation = expectation(description: "Download Failed")96        downloadFailedExpectation?.assertForOverFulfill = false97        downloader.start(with: url3)98        wait(for: [downloadFailedExpectation!], timeout: 5)99        var item = Item(url: url3)100        item.didStartExpectation = expectation(description: "Item Started Download")101        item.didFailExpectation = expectation(description: "Item Failed Download")102        item.startDownload(with: downloader)103        wait(for: [item.didStartExpectation!, item.didFailExpectation!], timeout: 5)104    }105    func testReplaceItem() {106        let item1 = Item(url: url1)107        downloader.start(with: item1)108        let item2 = Item(url: url2)109        downloader.replaceItem(at: 0, with: item2)110        XCTAssertNil(downloader.item(with: url1), "Should not be able to find item with url.")111        XCTAssertNotNil(downloader.item(with: url2), "Should be able to find item with url.")112        XCTAssertEqual(downloader.items.count, 1, "Should have 1 download item.")113    }114}115extension DownloaderTests: DownloaderDelegate {116    func didStartDownloadTask(_ task: URLSessionDownloadTask, sender: Downloader) {117        XCTAssertNotNil(downloader.tasks.firstIndex(of: task), "Should have this task in tasks.")118    }119    func didUpdateDownloadTask(_ task: URLSessionDownloadTask, progress: Float, sender: Downloader) {120        let message = "Progress should be between 0 and 1."121        XCTAssertGreaterThanOrEqual(progress, 0, message)122        XCTAssertLessThanOrEqual(progress, 1, message)123    }124    func didStopDownloadTask(_ task: URLSessionDownloadTask, sender: Downloader) {125        XCTAssertNil(downloader.tasks.firstIndex(of: task), "Should not have this task in tasks.")126    }127    func didFinishDownloadTask(_ task: URLSessionDownloadTask, to location: URL, sender: Downloader) {128        let isDownloaded = FileManager.default.fileExists(atPath: location.path)129        XCTAssertTrue(isDownloaded, "Should have downloaded file at location: \(location).")130        downloadFinishedExpectation?.fulfill()131    }132    func didFailDownloadTask(_ task: URLSessionTask, with error: Error?, sender: Downloader) {133        if task.originalRequest?.url == url3 {134            XCTAssertNotNil(error, "Should have error: \(String(describing: error?.localizedDescription))")135            downloadFailedExpectation?.fulfill()136        }137    }138}...