最近抽空了解了一下objective-c上的一个比较好用的单体测试框架OCMock。（记得挺早的时候就看到过，不过一直没时间去仔细了解，这次就抽空试用了一下）

OCMock是在编写objective-c的单元测试能够在不影响其他关联代码的情况下为测试对象（类）提供预期的测试数据。对Java开发人员来说，这个类库其实与Java开发中的mockito是同一个用途的。

OCMock官网：

下面举几个不同的数据注入方式。 #Settings

@interface Settings : NSObject+(Settings *)sharedInstance;@property(nonatomic, copy) NSString *email;@end@implementation Settings//...省略- (Settings *)init{    self = [super init];    if (self != nil) {        self.email = [ISRKeyChainUtil valueForKey:KEYCHAIN_EMAIL];    }    return self;}//...省略@end

#ISRKeyChainUtil

@interface ISRKeyChainUtil : NSObject/**always return @"HelloWorld"**/+ (id)valueForKey:(NSString *)key;@end

#UnitTest Code

- (void)testSharedInstance{    //[Settings sharedInstance] like java singleton class    id mockSettingsToTest = OCMPartialMock([Settings sharedInstance]);    OCMStub([mockSettingsToTest email]).andReturn(@"multiuser@multi.isr.co.jp");    Settings *settings = [Settings sharedInstance];    AssertStringEqual(settings.email,@"multiuser@multi.isr.co.jp");    [mockSettingsToTest stopMocking];}- (void)testDifferentInstance{    Settings *settingsWillMock = [[Settings alloc] init];    Settings *settingsNormal = [[Settings alloc] init];    id mockSettingsToTest = OCMPartialMock(settingsWillMock);    OCMStub([mockSettingsToTest email]).andReturn(@"multiuser@multi.isr.co.jp");    AssertStringEqual(settingsWillMock.email,@"multiuser@multi.isr.co.jp");    AssertStringEqual(settingsNormal.email,@"HelloWorld");    [mockSettingsToTest stopMocking];}- (void)testClassMock{    id mockISRKeyChainUtilToTest = OCMClassMock([ISRKeyChainUtil class]);    OCMStub(ClassMethod([mockISRKeyChainUtilToTest valueForKey:@"email"])).andReturn(@"multiuser@multi.isr.co.jp");    Settings *settings = [Settings sharedInstance];    AssertStringEqual(settings.email, @"multiuser@multi.isr.co.jp");    [mockISRKeyChainUtilToTest stopMocking];}//利用反射的方式来获取参数数据并传递指定的Return值回去- (id)mockHttpClient {    U2FHttpClient *httpClient = [[U2FHttpClient alloc] init];    id mockU2FHttpClient = OCMPartialMock(httpClient);    ClientRegistrationRequest __block *clientRegistrationRequest = [MockDataUtil clientRegistrationRequest_Success];    OCMStub([mockU2FHttpClient retrieveRegistrationRequestWithClientIdentifierRequest:[OCMArg isKindOfClass:[ClientIdentifierRequest class]]])        .andDo(^(NSInvocation *invocation) {          __unsafe_unretained ClientIdentifierRequest *clientRequest;          [invocation getArgument:&clientRequest atIndex:2];            NSLog(@"1:%@",clientRequest);          NSLog(@"%@", clientRegistrationRequest);          [invocation setReturnValue:&clientRegistrationRequest];        });    return mockU2FHttpClient;}