问对被调用的委托方法进行XCTest测试
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Stack Overflow用户

提问于 2014-05-31 16:01:40

回答 2查看 10.1K关注 0票数 13

我一直在尝试测试我创建的一些类，这些类使用NSNetServer类等执行网络操作。我在确保委托方法被调用时遇到了一些问题。

我尝试了很多方法，包括：

使用[NSThread sleepForTimeInterval:5.0f];和[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:5.0f]];在其他操作发生时简单地暂停。NSRunLoop方法在第一次调用时可以正常工作(如下面的示例代码所示)，但在第二次调用时会崩溃。我知道这两种方法都不是“正确”的，但我不知道什么是“正确”的方法。

使用NSCondition和NSConditionLock类，这似乎只是锁定了代码，并且回调永远不会被调用。

在回调方法中更改的变量上使用while循环，与上面相同。

为了简单起见，下面的代码包含了一些额外的注释和一些删除的测试：

- (void)testCheckCredentials
{
    [self.server start];
    // Create a client
    self.nsb = [[NSNetServiceBrowser alloc] init];
    // Set the delegate to self
    self.nsb.delegate = self;
    // Search for the server
    [self.nsb searchForServicesOfType:self.protocol inDomain:@""];
    // Wait for the service to be found and resolved
    [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:self.timeout]];
    XCTAssertTrue(self.serviceWasFound, @"Service was not found");
    // Open the connection to the server
    XCTAssertTrue([self.serverConnection open], @"Connection to server failed to open");
    // Wait for the client to connect
    /* This is where it crashes */
    [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:self.timeout]];
    XCTAssertTrue(self.clientDidConnect, @"Client did not connect");
    /* Further, more class-specific tests */
}

- (void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)service moreComing:(BOOL)moreComing
{
    NSLog(@"Found a service: %@ (%@)", service.name, service.domain);
    if ([self.serverName isEqualToString:service.name]) {
        self.serviceWasFound = YES;
    }
}

- (void)clientDidConnect:(RCFClientConnection *)client
{
    XCTAssertNotNil(client, @"Connected client is nil");
    self.clientConnection = client;
    self.clientDidConnect = YES;
}

我还尝试过在NSCondition对象上执行lock：

[self.nsb searchForServicesOfType:self.protocol inDomain:@""];
// Wait for the service to be found and resolved
[self.lock lockWhenCondition:1];
XCTAssertTrue(self.serviceWasFound, @"Service was not found");

和

self.serviceWasFound = YES;
[self.lock unlockWithCondition:1]

当使用lock方法时，netServiceBrowser:didFindService:moreComing:方法永远不会被调用，当我使用：

while (!self.serviceWasFound) {};

我还在学习Objective-C，但我完全被这个问题卡住了。

ios

objective-c

macos

xctest

回答 2

Stack Overflow用户

回答已采纳

发布于 2015-04-28 08:58:10

为了处理调用异步执行方法和函数的测试组件，XCTest在Xcode6中得到了增强，包括使用新的API和类XCTestExpectation的对象处理块的能力。这些对象响应新的XCTest方法，这些方法允许测试方法等待，直到异步调用返回或超时。

这是上面摘录的苹果文档的链接。Writing Tests of Asynchronous Operations

@interface sampleAPITests : XCTestCase<APIRequestClassDelegate>{
APIRequestClass *apiRequester;
XCTestExpectation *serverRespondExpectation;
}
@end

//implementation test class
- (void)testAPIConnectivity {
// This is an example of a functional test case.
serverRespondExpectation = [self expectationWithDescription:@"server responded"];
[apiRequester sendAPIRequestForMethod:nil withParams:nil];//send request to server to get tap info
apiRequester.delegate = self;
[self waitForExpectationsWithTimeout:1 handler:^(NSError *error) {
    if (error) {
        NSLog(@"Server Timeout Error: %@", error);
    }
   nslog(@"execute here after delegate called  or timeout");
}];
XCTAssert(YES, @"Pass");
}

//Delegate implementation
- (void) request:(APIRequest *)request didReceiveResponse:(NSDictionary *)jsonResponse success:(BOOL)success{
[serverRespondExpectation fulfill];
XCTAssertNotNil(jsonResponse,@"json object returned from server is nil");
}