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PHFDelegateChainTests.m
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PHFDelegateChainTests.m
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//
// PHFDelegateChainTest.m
// PHFDelegateChainTest
//
// Created by Philipe Fatio on 28.05.12.
// Copyright (c) 2012 loqize.me. All rights reserved.
//
#import <SenTestingKit/SenTestingKit.h>
#import <OCMock/OCMock.h>
#import "PHFDelegateChain.h"
#pragma mark - Test Helpers
@protocol Receiver <NSObject>
@required
- (void)requiredMethod;
@optional
- (void)optionalMethod;
- (NSString *)returningMethod;
@end
@interface TestReceiverOnlyRequired : NSObject <Receiver> @end
@implementation TestReceiverOnlyRequired
- (void)requiredMethod {}
@end
@interface TestReceiverRequiredAndOptional : NSObject <Receiver> @end
@implementation TestReceiverRequiredAndOptional
- (void)requiredMethod {}
- (void)optionalMethod {}
- (NSString *)returningMethod { return nil; }
@end
#pragma mark - Test Case
@interface PHFDelegateChainTest : SenTestCase @end
@implementation PHFDelegateChainTest
- (void)testRequiredMethodShouldBeInvokedOnAllObjects {
id firstObject = [OCMockObject mockForClass:[TestReceiverOnlyRequired class]];
id secondObject = [OCMockObject mockForClass:[TestReceiverRequiredAndOptional class]];
PHFDelegateChain<Receiver> *chain = [PHFDelegateChain delegateChainWithObjects:firstObject, secondObject, nil];
[[firstObject expect] requiredMethod];
[[secondObject expect] requiredMethod];
[chain requiredMethod];
[firstObject verify];
[secondObject verify];
}
- (void)testOptionalMethodShouldBeInvokedOnlyOnObjectsImplementingIt {
id firstObject = [OCMockObject mockForClass:[TestReceiverOnlyRequired class]];
id secondObject = [OCMockObject mockForClass:[TestReceiverRequiredAndOptional class]];
PHFDelegateChain<Receiver> *chain = [PHFDelegateChain delegateChainWithObjects:firstObject, secondObject, nil];
[[firstObject reject] optionalMethod];
[[secondObject expect] optionalMethod];
[chain optionalMethod];
[firstObject verify];
[secondObject verify];
}
- (void)testWhenChainIsBreakingMethodShouldOnlyBeInvokedOnFirstRespondingObject {
id firstObject = [OCMockObject mockForClass:[TestReceiverOnlyRequired class]];
id secondObject = [OCMockObject mockForClass:[TestReceiverRequiredAndOptional class]];
PHFDelegateChain<Receiver> *chain = [PHFDelegateChain delegateChainWithObjects:firstObject, secondObject, nil];
[chain __setBreaking:YES];
[[firstObject expect] requiredMethod];
[[secondObject reject] requiredMethod];
[chain requiredMethod];
[firstObject verify];
[secondObject verify];
}
- (void)testReturningMethodShouldOnlyBeInvokedOnFirstRespondingObject {
id firstObject = [OCMockObject mockForClass:[TestReceiverRequiredAndOptional class]];
id secondObject = [OCMockObject mockForClass:[TestReceiverOnlyRequired class]];
PHFDelegateChain<Receiver> *chain = [PHFDelegateChain delegateChainWithObjects:firstObject, secondObject, nil];
[[[firstObject expect] andReturn:@"Foo"] returningMethod];
[[secondObject reject] returningMethod];
NSString *response = [chain returningMethod];
STAssertTrue([response isEqualToString:@"Foo"], nil);
[firstObject verify];
[secondObject verify];
}
- (void)testShouldConformToProtocolIfAnyObjectDoes {
id object = [TestReceiverOnlyRequired new];
PHFDelegateChain *chain = [PHFDelegateChain delegateChainWithObjects:object, nil];
STAssertTrue([chain conformsToProtocol:@protocol(Receiver)], nil);
}
- (void)testShouldNotConformToProtocolIfNoObjectDoes {
id object = [NSObject new];
PHFDelegateChain *chain = [PHFDelegateChain delegateChainWithObjects:object, nil];
STAssertFalse([chain conformsToProtocol:@protocol(Receiver)], nil);
}
- (void)testShouldRespondToMethodIfAnyObjectDoes {
id firstObject = [TestReceiverOnlyRequired new];
id secondObject = [TestReceiverRequiredAndOptional new];
PHFDelegateChain *chain = [PHFDelegateChain delegateChainWithObjects:firstObject, secondObject, nil];
STAssertTrue([chain respondsToSelector:@selector(optionalMethod)], nil);
}
- (void)testShouldNotRespondToMethodIfNoObjectDoes {
id object = [TestReceiverOnlyRequired new];
PHFDelegateChain *chain = [PHFDelegateChain delegateChainWithObjects:object, nil];
STAssertFalse([chain respondsToSelector:@selector(optionalMethod)], nil);
}
- (void)testShouldAllowManipulationOfObjects {
id firstObject = [OCMockObject mockForClass:[TestReceiverOnlyRequired class]];
id secondObject = [OCMockObject mockForClass:[TestReceiverRequiredAndOptional class]];
PHFDelegateChain<Receiver> *chain = [PHFDelegateChain delegateChainWithObjects:firstObject, nil];
[[firstObject expect] requiredMethod];
[chain requiredMethod];
[firstObject verify];
[[chain __objects] addObject:secondObject];
[[firstObject expect] requiredMethod];
[[secondObject expect] requiredMethod];
[chain requiredMethod];
[firstObject verify];
[secondObject verify];
}
- (void)testShouldRaiseWhenPerformingMethodThatNoObjectRespondsTo {
id object = [TestReceiverOnlyRequired new];
PHFDelegateChain<Receiver> *chain = [PHFDelegateChain delegateChainWithObjects:object, nil];
STAssertThrowsSpecificNamed([chain performSelector:@selector(optionalMethod)], NSException, NSInvalidArgumentException, nil);
}
@end