Question

我是ios系列的新手。我有一个任务来克服这种方法的测试用例。

+ (void)myMethod:(NSString *)paramA callback:(void(^)(NSString *result, BOOL success))callback;
// ... Some code that runs async (for example, something that fetches data from the internet)...

// Call the callback function in a background thread
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    callback(@"Success", YES);
});
}

通过rnd我知道用于创建单元测试用例的XCTestExpectation相关的东西......

Answer 1

只需在竞争栏中调用fulfill即可。例如：

假设FunctionObj持有函数

@interface FunctionObj : NSObject
+ (void)myMethod:(NSString *)paramA callback:(void(^)(NSString *result, BOOL success))callback;
@end
@implementation FunctionObj
+ (void)myMethod:(NSString *)paramA callback:(void(^)(NSString *result, BOOL success))callback {

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    callback(@"Success", YES);
    });
}
@end

那么测试用例应该是

- (void)testAsyncFunction {
    XCTestExpectation * expectation = [self expectationWithDescription:@"Test async method"];
    [FunctionObj myMethod:@"1" callback:^(NSString *result, BOOL success) {
        XCTAssert(success,"should be succeed");
        XCTAssertNotNil(result,@"Should not be nil");
        [expectation fulfill];
    }];
    [self waitForExpectationsWithTimeout:10 handler:^(NSError *error) {
        //Do something when time out
    }];
}

异步方法ios的单元测试用例

1 个答案: