ServerTests.m

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// CFSockets ServerTests.m
//
// Copyright © 2012, 2013, Roy Ratcliffe, Pioneering Software, United Kingdom
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the “Software”), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED “AS IS,” WITHOUT WARRANTY OF ANY KIND, EITHER
// EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO
// EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
//------------------------------------------------------------------------------

#import "ServerTests.h"

#import <CFSockets/CFSockets.h>

@interface ServerTests()

@property(strong, NS_NONATOMIC_IOSONLY) NSMutableSet *streamPairs;

@end

@implementation ServerTests

@synthesize streamPairs;

- (void)setUp
{
    [self setStreamPairs:[NSMutableSet set]];
}

- (void)testServerSocket
{
    NSError *__autoreleasing error = nil;

    CFSocket *serverSocket = [[CFSocket alloc] initForTCPv6];
    STAssertNotNil(serverSocket, nil);
    STAssertTrue([serverSocket setReuseAddressOption:YES], nil);
    STAssertTrue([serverSocket setAddress:CFSocketAddressDataFromLoopBackIPv6WithPort(54321) error:&error], nil);
    STAssertNil(error, nil);
    STAssertEquals([serverSocket addressFamily], AF_INET6, nil);
    STAssertEquals([serverSocket port], 54321, nil);

    // Run the server socket in a run-loop for 10 seconds. Make a connection to
    // the server using "telnet localhost 54321" at the command line. Enter a
    // line and you will see your message replied with a cryptic prefix. Beware
    // the Master Control Program!
    [serverSocket setDelegate:self];
    [serverSocket addToCurrentRunLoopForCommonModes];
    do
    {
        [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:10.0]];
    }
    while ([[self streamPairs] count]);
}

- (void)socket:(CFSocket *)socket acceptStreamPair:(CFStreamPair *)streamPair
{
    // Important to retain the stream pair. Otherwise ARC will de-allocate and
    // reclaim its space.
    [[self streamPairs] addObject:streamPair];
    [streamPair setDelegate:self];
    [streamPair open];
}

- (void)streamPair:(CFStreamPair *)streamPair hasBytesAvailable:(NSUInteger)bytesAvailable
{
    NSString *line = [streamPair receiveLineUsingEncoding:NSUTF8StringEncoding];
    if (line)
    {
        [streamPair sendBytes:[[NSString stringWithFormat:@"MCP: %@", line] dataUsingEncoding:NSUTF8StringEncoding]];
    }
}

- (void)streamPair:(CFStreamPair *)streamPair handleRequestEvent:(NSStreamEvent)eventCode
{
    switch (eventCode)
    {
        case NSStreamEventEndEncountered:
            // Important to un-retain the stream pair after the other end
            // terminates the connection. No point holding on to it. ARC will
            // automatically release it, and the stream pair will automatically
            // close itself.
            [[self streamPairs] removeObject:streamPair];
            break;
        default:
            ;
    }
}

@end