ios - OCMockObject 模拟一个实例方法

Question

我是 OCMockObjects 的新手，正在尝试模拟 ACAccount 类的实例方法:

-(NSArray *)accountsWithAccountType:(ACAccountType *)accountType;

我在测试类中写了这段代码来初始化mockObject:

ACAccountStore *accountStore = [[ACAccountStore alloc] init];
id mockAccountStore = [OCMockObject partialMockForObject:accountStore];
[[[mockAccountStore stub] andReturn:@[@"someArray"]] accountsWithAccountType:[OCMArg any]];

//call the test method
[myClassInstance methodToTest];

在 myClass 中，方法 ToTest 如下所示:

 -(void) methodToTest
{
    ACAccountStore *accountStore = [[ACAccountStore alloc] init];
    ACAccountType* accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];
    NSArray* expectedArray = [accountStore accountsWithAccountType:accountType];
   //Getting nil value to Array rather than the returned value in stub
}

知道我在这里做错了什么吗？谢谢。

Answer 1

Ben Flynn 是正确的，您需要一种方法将 AccountStore 注入(inject)到您正在测试的对象中。执行此操作的另外两种方法:

1) 使 accountStore 成为在初始化时设置的被测类的属性，然后在您的测试中使用模拟覆盖该属性。

2) 创建一个类似于 -(ACAccountStore *)accountStore 的方法来初始化帐户存储，但在您的测试中模拟该方法:

ACAccountStore *accountStore = [[ACAccountStore alloc] init];
id mockAccountStore = [OCMockObject partialMockForObject:accountStore];
[[[mockAccountStore stub] andReturn:@[@"someArray"]] accountsWithAccountType:[OCMArg any]];

id mockInstance = [OCMockObject partialMockForObject:myClassInstance];
[[[mockInstance stub] andReturn:mockAccountStore] accountStore];

// call the test method
[myClassInstance methodToTest];