OCMock，爲什麼我不能期望協議的方法？

Question

考慮以下代碼，其工作方式（該loginWithEmail方法被預期爲，那麼，預期）：

_authenticationService = [[OCMockObject mockForClass:[AuthenticationService class]] retain]; 
[[_authenticationService expect] loginWithEmail:[OCMArg any] andPassword:[OCMArg any]]; 

對戰此代碼：

_authenticationService = [[OCMockObject mockForProtocol:@protocol(AuthenticationServiceProtocol)] retain]; 
[[_authenticationService expect] loginWithEmail:[OCMArg any] andPassword:[OCMArg any]]; 

第二個代碼示例第2行失敗，出現以下錯誤：

*** -[NSProxy doesNotRecognizeSelector:loginWithEmail:andPassword:] called! Unknown.m:0: error: -[MigratorTest methodRedacted] : *** 
-[NSProxy doesNotRecognizeSelector:loginWithEmail:andPassword:] called! 

AuthenticationServiceProtocol聲明方法：

@protocol AuthenticationServiceProtocol <NSObject> 
@property (nonatomic, retain) id<AuthenticationDelegate> authenticationDelegate; 

- (void)loginWithEmail:(NSString *)email andPassword:(NSString *)password; 
- (void)logout; 
- (void)refreshToken; 

@end 

而且它是在類中實現：

@interface AuthenticationService : NSObject <AuthenticationServiceProtocol> 

這是使用OCMock爲iOS。

爲什麼expect失敗時，模擬是mockForProtocol？

Answer 1

這很好奇。我已經添加下面的類到iOS5的示例項目：

@protocol AuthenticationServiceProtocol 

- (void)loginWithEmail:(NSString *)email andPassword:(NSString *)password; 

@end 

@interface Foo : NSObject 
{ 
    id<AuthenticationServiceProtocol> authService; 
} 

- (id)initWithAuthenticationService:(id<AuthenticationServiceProtocol>)anAuthService; 
- (void)doStuff; 

@end 

@implementation Foo 

- (id)initWithAuthenticationService:(id<AuthenticationServiceProtocol>)anAuthService 
{ 
    self = [super init]; 
    authService = anAuthService; 
    return self; 
} 

- (void)doStuff 
{ 
    [authService loginWithEmail:@"x" andPassword:@"y"]; 
} 

@end 

@implementation ProtocolTests 

- (void)testTheProtocol 
{ 
    id authService = [OCMockObject mockForProtocol:@protocol(AuthenticationServiceProtocol)]; 
    id foo = [[Foo alloc] initWithAuthenticationService:authService]; 

    [[authService expect] loginWithEmail:[OCMArg any] andPassword:[OCMArg any]]; 

    [foo doStuff]; 

    [authService verify]; 
} 

@end 

當我在Xcode 4.5版（4G182）對抗iPhone 6.0模擬器測試通過運行此。模擬對象的使用方式有什麼不同嗎？在你的情況下，_authenticationService傳遞到哪裏？收件人對此做了什麼？