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;; test_forwarding.nu
;; tests for message forwarding in Nu
;;
;; Copyright (c) 2011 Brian Chapados
(class RealThingBase is NSObject
(- (id)baseName is "RealThingBase"))
(class RealThing is RealThingBase
(- (id)realName is "RealThing"))
;; Standard Message forwarding:
;; override -forwardInvocation:, -respondsToSelector:, -methodSignatureForSelector:
(class MyRegularProxy is NSObject
(- (id)initWithObject:(id)delegate is
(self init)
(set @delegate delegate)
self)
(- (id)proxyName is "ARegularProxy")
(- (void) forwardInvocation:(id) invocation is
(set selector (invocation selector))
(if (@delegate respondsToSelector:selector)
(then
(invocation retainArguments)
(invocation invokeWithTarget:@delegate))
(else
(self doesNotRecognizeSelector:selector))))
(- (BOOL) respondsToSelector:(SEL) selector is
(set mySuperClass (RealThing class))
(set result (mySuperClass instancesRespondToSelector:selector))
(if (eq NO result)
(set result (@delegate respondsToSelector:selector)))
result)
(- (id)methodSignatureForSelector:(SEL) selector is
(@delegate methodSignatureForSelector:selector)))
;; Fast-forwarding path:
;; implement -forwardingTargetForSelector:
(class MyFastProxy is NSObject
(- (id)initWithObject:(id)delegate is
(self init)
(set @delegate delegate)
self)
(- (id)proxyName is "AFastForwardingProxy")
(- (id)forwardingTargetForSelector:(SEL)selector is
(if (@delegate respondsToSelector:selector)
(then @delegate)
(else nil))))
(class TestForwarding is NuTestCase
(- testNormalForwarding is
(set real ((RealThing alloc) init))
(set proxy ((MyRegularProxy alloc) initWithObject:real))
(assert_equal "RealThing" (real realName))
(assert_equal "ARegularProxy" (proxy proxyName))
(assert_equal "RealThing" (proxy realName))
(assert_equal "RealThingBase" (proxy baseName)))
(- testFastForwarding is
(set real ((RealThing alloc) init))
(set proxy ((MyFastProxy alloc) initWithObject:real))
(assert_equal "RealThing" (real realName))
(assert_equal "AFastForwardingProxy" (proxy proxyName))
(assert_equal "RealThing" (proxy realName))
(assert_equal "RealThingBase" (proxy baseName))))