Xcode：Objective-C：类型不匹配

Question

产品构建成功，但测试失败。如何通过下面STAssertEquals 行报告的类型不匹配失败？

// TransactionSpec.m

#import "Transaction.h"

@interface TransactionSpec : SenTestCase
@end

@implementation TransactionSpec

#pragma mark Properties

- (void)testProperties {
    Transaction *transaction = [[Transaction alloc] init];
    transaction.type = TransactionTypePay;

    STAssertNotNil(transaction, @"transaction exists");
    STAssertEquals(transaction.type, TransactionTypePay, @"type property works"); // Type mismatch
}

@end

// Transaction.h

typedef enum {
    TransactionTypePay,
    TransactionTypeCharge
} TransactionType;

@interface Transaction : NSObject

@property (nonatomic) TransactionType *type;

@end

// Transaction.m

#import "Transaction.h"

@implementation Transaction

@synthesize type;

@end

Answer 1

您的type 属性是一个指针，指向TransactionType（这可能不是有意的），而TransactionTypePay 是一个实际的TransactionType。

Answer 2

您的type 属性被声明为枚举的指针，可能不应该这样

Answer 3

将transaction.type 转换为TransactionType 可以解决此问题：

STAssertEquals((TransactionType)transaction.type, TransactionTypePay, @"type property works");

但是，既然我声明了，我为什么要这样做：

@property (nonatomic) TransactionType *type;