简介
在iOS做单元测试的时候，写异步方法的时候是比较恶心的，系统提供的API简直不能忍，先看一下
//1. 设置一个Expectation
XCTestExpectation *expectation = [self expectationWithDescription:@"testSomeThing"];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
// 3. 异步操作在3秒后完成，完成后调用fulfill，而等待的方法则继续运行");
[expectation fulfill];
});
//2. 等待Expectation结束，超过超时时间则测试失败
[self waitForExpectationsWithTimeout:30 handler:nil];
用法
系统提供的API太过于简陋，有时候我们不希望超时的时候就立即停止测试，而是可以获取是否超时的结果，或者提供一些重试的机制，在这里封装了几个异步方法，基于MainRunLoop，提供重试机制，通过扩展XCTestCase实现，可以通过Pod导入
pod 'XCTestCaseAsync'
具体代码见后面链接，先看看用法
- 异步测试
//1. wait with a async block
[self waitWithAsync:^(FinishBlock _Nonnull complete) {
// async method
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
// set finish flag, finish async
complete();
});
}];
- 超时测试
//2. timeout
BOOL success = [self waitWithTimeout:3 asyncBlock:^(FinishBlock _Nonnull complete) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(15 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
complete();
});
}];
if (success) {
NSLog(@"block execute success");
} else {
NSLog(@"timeout");
}
- 重试
//3. retry
BOOL success = [self waitWithRetryTimes:3 asyncBlock:^(CompleteBlock _Nonnull complete) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
NSLog(@"failure");
complete(NO);
});
}];
if (success) {
NSLog(@"block execute success");
} else {
NSLog(@"block execute fail after retry");
}
- swift版本如下
// 1. async test
self.wait { (complete) in
let delay = DispatchTime.now() + .seconds(1)
DispatchQueue.main.asyncAfter(deadline: delay, execute: {
complete()
})
}
// 2. timeout test
let success = self.wait(withTimeout: 3) { (complete) in
let delay = DispatchTime.now() + .seconds(5)
DispatchQueue.main.asyncAfter(deadline: delay, execute: {
complete()
})
}
// 3. retry test
let success = self.wait(withRetryTimes: 3) { (complete) in
let delay = DispatchTime.now() + .seconds(1)
DispatchQueue.main.asyncAfter(deadline: delay, execute: {
print("failure")
complete(false);
})
}
代码
详细代码见这里
