NSCoder编码器问题

Question

这是我下面的代码，我想对这个文件使用单元测试，而不是其他。我想知道是否可以在XCTest中对这段代码进行单元测试。

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface Presenter : NSObject
@property (nonatomic, retain) NSString *Name;
@property (nonatomic, retain) NSString *Topic;
@property (nonatomic, retain) NSString *Date;
@property (nonatomic, retain) NSString *Time;
@property (nonatomic, retain) NSString *Location;
@property (nonatomic, retain) UIImage *image;
@property (nonatomic, retain) NSMutableDictionary *rattings;
@property (nonatomic, assign) BOOL isLiked;



@end

这是M文件：

#import "Presenter.h"

@implementation Presenter

- (id) initWithCoder: (NSCoder *)coder
{
    if (self = [super init])
    {
        self.Name = [coder decodeObjectForKey:@"Name"];
        self.Topic = [coder decodeObjectForKey:@"Topic"];
        self.Date = [coder decodeObjectForKey:@"Date"];
        self.Time = [coder decodeObjectForKey:@"Time"];
        self.Location = [coder decodeObjectForKey:@"Location"];
        self.image = [coder decodeObjectForKey:@"image"];
        self.rattings = [coder decodeObjectForKey:@"rattings"];
        self.isLiked = [coder decodeBoolForKey:@"isLiked"];

    }

    return self;


}

- (void) encodeWithCoder: (NSCoder *)coder
{
    [coder encodeObject: self.Name forKey:@"Name"];
    [coder encodeObject: self.Topic forKey:@"Topic"];
    [coder encodeObject: self.Date forKey:@"Date"];
    [coder encodeObject: self.Time forKey:@"Time"];
    [coder encodeObject: self.Location forKey:@"Location"];
    [coder encodeObject: self.image forKey:@"image"];
    [coder encodeObject: self.rattings forKey:@"rattings"];
    [coder encodeBool: self.isLiked forKey:@"isLiked"];

}


@end

我发现这是关于NScoder单元测试的

如何对NSCoding进行单元测试？

并试图应用它，但是我的尝试给出了错误:捕捉到"NSInvalidArgumentException"，"-__NSCFConstantString countByEnumeratingWithState:objects:count:un为人所识别的选择器“

- (void)testName {
    NSLog(@"%@ start", self.name);   // self.name is the name of the test-case method.
    NSKeyedArchiver *archive = [[NSKeyedArchiver alloc] initForWritingWithMutableData:(NSMutableData *)presenter];
    [archive encodeObject:presenter forKey:@"Name"];
    for (NSString *Name in presenter.Name) {
        [archive encodeObject:[presenter valueForKey:Name] forKey:@"Name"];
    }
    XCTAssertTrue([[presenter Name] isEqualToString:@"Name"], "Name");
    NSLog(@"%@ end", self.name);
}

Answer 1

您应该从阅读文件开始学习如何使用NSKeyedArchiver和NSKeyedUnarchiver。

下面是您的方法应该是什么样子：

- (void)testName
{
    NSLog(@"%@ start", self.name);   // self.name is the name of the test-case method.

    Presenter *presenter = [[Presenter alloc] init];
    presenter.Name = @"John";
    NSMutableData *presenterData = [NSMutableData data];

    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:presenterData];
    [archiver encodeObject:presenter forKey:@"presenter"];
    [archiver finishEncoding];

    NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:presenterData];
    Presenter *decodedPresenter = [unarchiver decodeObjectForKey:@"presenter"];
    [unarchiver finishDecoding];

    XCTAssertTrue([decodedPresenter.Name isEqualToString:presenter.Name], "Name");

    NSLog(@"%@ end", self.name);
}

但是，您可以使用工厂方法以一种简单得多的方式完成这一任务：

- (void)testName
{
    NSLog(@"%@ start", self.name);   // self.name is the name of the test-case method.

    Presenter *presenter = [[Presenter alloc] init];
    presenter.Name = @"John";

    NSData *presenterData = [NSKeyedArchiver archivedDataWithRootObject:presenter];
    Presenter *decodedPresenter = [NSKeyedUnarchiver unarchiveObjectWithData:presenterData];

    XCTAssertTrue([decodedPresenter.Name isEqualToString:presenter.Name], "Name");

    NSLog(@"%@ end", self.name);
}