Ios RestKit测试映射与单独类中的RKObjectMapping不工作

我有一个模型类

ApplicationError

，如下所示：

@interface ApplicationError : NSObject
@property (nonatomic, strong) NSString *status;
@property (nonatomic, strong) NSString *code;
@property (nonatomic, strong) NSString *message;
@end

在一个单独的类

MappingProvider

中，我创建了我的

RKObjectMapping

，以适合此模型：

@implementation MappingProvider

+ (RKObjectMapping *)mappingForApplicationError {
    RKObjectMapping *errorMapping = [RKObjectMapping mappingForClass:[ApplicationError class]];
    [errorMapping addAttributeMappingsFromArray:[self propertiesError]];
    return errorMapping;
}

+ (NSArray *)propertiesError {
    return @[@"status", @"code", @"message"];
}

当测试这个映射时，我的测试并没有像应该的那样成功

- (void)testMappingOfStatus {

    RKObjectMapping *errorMapping = [MappingProvider mappingForApplicationError];
    RKMappingTest *mappingTest = [RKMappingTest testForMapping:errorMapping sourceObject:self.parsedJSON destinationObject:nil];
    [mappingTest addExpectation:[RKPropertyMappingTestExpectation expectationWithSourceKeyPath:@"status" destinationKeyPath:@"status"]];
    XCTAssert([mappingTest evaluate]);
}

self.parsedJSON

是从Fixture JSON文件解析的

id

-对象。 当我用这个方法（而不是在单独的

MappingProvider

-类中）创建错误映射时，一切正常

RKObjectMapping *errorMapping = [RKObjectMapping mappingForClass:[ApplicationError class]];
[errorMapping addAttributeMappingsFromArray:@[@"status", @"code", @"message"]];

记录两个版本时，它们看起来相同（只是内存位置不同）。 知道为什么会这样吗

更新

日志显示：

AE_MAPPING_1 = <RKObjectMapping:0x1501a750 objectClass=ApplicationError propertyMappings=(
    "<RKAttributeMapping: 0x1505e0b0 status => status>",
    "<RKAttributeMapping: 0x1505e0c0 code => code>",
    "<RKAttributeMapping: 0x15a94850 message => message>"
)>

AE_MAPPING_2 = <RKObjectMapping:0x1505a660 objectClass=ApplicationError propertyMappings=(
    "<RKAttributeMapping: 0x1505b620 status => status>",
    "<RKAttributeMapping: 0x1505b630 code => code>",
    "<RKAttributeMapping: 0x1505b640 message => message>"
)>

(([mappingTest evaluate]) is true) failed: throwing "0x15a98f60: failed with error: (null)
RKMappingTest Expectations: (
    "map 'status' to 'status'"
)
Events: (
) during mapping from <CFBasicHash 0x15031030 [0x31d8ec8]>{type = immutable dict, count = 3,
entries =>
    0 : <CFString 0x15a957b0 [0x31d8ec8]>{contents = "status"} = <CFNumber 0x15a95240 [0x31d8ec8]>{value = +400, type = kCFNumberSInt64Type}
    1 : <CFString 0x15a95250 [0x31d8ec8]>{contents = "code"} = <CFNumber 0x15a95c00 [0x31d8ec8]>{value = +4002, type = kCFNumberSInt64Type}
    2 : <CFString 0x15a96130 [0x31d8ec8]>{contents = "message"} = <CFString 0x15a97310 [0x31d8ec8]>{contents = "Something went wrong."}
}
to (null) with mapping <RKObjectMapping:0x1505a660 objectClass=ApplicationError propertyMappings=(
    "<RKAttributeMapping: 0x1505b620 status => status>",
    "<RKAttributeMapping: 0x1505b630 code => code>",
    "<RKAttributeMapping: 0x1505b640 message => message>"
)>"

error: -[ApplicationErrorMappingTests testMappingOfStatus] : (([mappingTest evaluate]) is true) failed: throwing "0x15a98f60: failed with error: (null)
RKMappingTest Expectations: (
    "map 'status' to 'status'"
)
Events: (
) during mapping from <CFBasicHash 0x15031030 [0x31d8ec8]>{type = immutable dict, count = 3,
entries =>
    0 : <CFString 0x15a957b0 [0x31d8ec8]>{contents = "status"} = <CFNumber 0x15a95240 [0x31d8ec8]>{value = +400, type = kCFNumberSInt64Type}
    1 : <CFString 0x15a95250 [0x31d8ec8]>{contents = "code"} = <CFNumber 0x15a95c00 [0x31d8ec8]>{value = +4002, type = kCFNumberSInt64Type}
    2 : <CFString 0x15a96130 [0x31d8ec8]>{contents = "message"} = <CFString 0x15a97310 [0x31d8ec8]>{contents = "Something went wrong."}
}
 to (null) with mapping <RKObjectMapping:0x1505a660 objectClass=ApplicationError propertyMappings=(
    "<RKAttributeMapping: 0x1505b620 status => status>",
    "<RKAttributeMapping: 0x1505b630 code => code>",
    "<RKAttributeMapping: 0x1505b640 message => message>"
)>"

AE_映射_1=
AE_映射_2=
（（[mappingTest evaluate]）为true）失败：抛出“0x15a98f60:失败，错误为：（null）
RKMappingTest期望值：(
“将“状态”映射到“状态”
)
活动：(
)在从{type=immutable dict，count=3进行映射期间，
条目=>
0:{contents=“status”}={value=+400，type=kCFNumberSInt64Type}
1:{contents=“code”}={value=+4002，type=kCFNumberSInt64Type}
2:{contents=“message”}={contents=“出了问题。”}
}
使用“映射”设置为（null）
错误：-[ApplicationErrorMappingTests testMappingOfStatus]：（[mappingTest evaluate]）失败：引发“0x15a98f60:失败，错误为：（null）
RKMappingTest期望值：(
“将“状态”映射到“状态”
)
活动：(
)在从{type=immutable dict，count=3进行映射期间，
条目=>
0:{contents=“status”}={value=+400，type=kCFNumberSInt64Type}
1:{contents=“code”}={value=+4002，type=kCFNumberSInt64Type}
2:{contents=“message”}={contents=“出了问题。”}
}
使用“映射”设置为（null）

我找到了解决方案：显然，您必须在测试目标中添加单独的类（在我的例子中是

MappingProvider

-class）

---

仅将类添加到链接的开发目标中是不够的…

而且JSON在两个测试中都是相同的？JSON是什么？代码看起来不错。JSON看起来是这样的：{“状态”：400，“代码”：4002，“消息”：“出了问题。”}奇怪的是，它在第二个选项中工作（使用测试方法中声明的映射），但我不希望复制/粘贴我的提供程序类，而只是使用它……在这两种情况下，发布的代码看起来都正常。如果一个测试中的JSON是一个字典数组，那么它应该会失败。除此之外，没有明显的问题……跟踪日志记录可能会用日志记录语句更新；-）