基于iOS的Mantle模型误差测试

Question

给定以下简单的模型类(基于Mantle)：

// .h
#import <Mantle.h>

@interface JAIInterestingPhonesCategory : MTLModel <MTLJSONSerializing>

@property (copy, nonatomic, readonly) NSString *categoryId;
@property (copy, nonatomic, readonly) NSString *title;

@end

// .m
#import "JAIInterestingPhonesCategory.h"

@implementation JAIInterestingPhonesCategory

+ (NSDictionary *)JSONKeyPathsByPropertyKey
{
    return @{
             @"categoryId"  : @"id",
             };
}

@end

我创建了以下TestCase：

#import <XCTest/XCTest.h>
#import "JAIInterestingPhonesCategory.h"

@interface JAIInterestinPhoneTestCase : XCTestCase

@end

@implementation JAIInterestinPhoneTestCase

- (void)setUp
{
    [super setUp];
    // Put setup code here. This method is called before the invocation of each test method in the class.
}

- (void)tearDown
{
    // Put teardown code here. This method is called after the invocation of each test method in the class.
    [super tearDown];
}

- (void)testCreateModelWithJSONDictionary
{
    NSDictionary *JSONModelDictionary = @{
                                          @"id"     : @"catId",
                                          @"title"  : @"Category title"
                                          };

    NSError *error;
    JAIInterestingPhonesCategory *category = [MTLJSONAdapter modelOfClass:[JAIInterestingPhonesCategory class] fromJSONDictionary:JSONModelDictionary error:&error];
    XCTAssertNotNil(category, @"The instantiated category must not be nil");

}

@end

我得到了折叠运行时错误：

*** Assertion failure in -[MTLJSONAdapter initWithJSONDictionary:modelClass:error:] Invalid parameter not satisfying: [modelClass isSubclassOfClass:MTLModel.class]

正如你所看到的，modelClass(a.k.a. )JAIInterestingPhonesCategory)是MTLModel的一个子类。

我把Mantle作为一个Pod加入了这个项目。

知道这是怎么回事吗？谢谢！

Answer 1

这里的问题是，Mantle被注入您的测试和您的主要目标。

这里的解决方案是相应地更改podfile：

platform :ios, '7.0'

target :app do
    pod 'Mantle', '~> 1.4'
end

target :appTests do
  pod 'Expecta',     '~> 0.3'
end

有关更多信息，请访问https://github.com/Mantle/Mantle/issues/217。祝好运!