new: unittest for responderchain

Tests/AppKit/CPViewControllerTest.j

@@ -2,6 +2,7 @@
 @import <AppKit/CPApplication.j>
 
 var methodsCalled;
+var testResponderChainActionCalled;
 
 @implementation CPViewControllerTest : OJTestCase
 {
@@ -56,6 +57,34 @@ var methodsCalled;
     [self assert:expectedResult equals:methodsCalled];
 }
 
+- (void)testResponderChain
+{
+    testResponderChainActionCalled = NO;
+
+    // 1. Create the controller, its view, and a superview.
+    var viewController = [[ResponderTestViewController alloc] init];
+    var view = [viewController view];
+    var superview = [[CPView alloc] init];
+
+    // 2. Add the view to the view hierarchy.
+    [superview addSubview:view];
+
+    // 3. Assert the responder chain is correctly wired.
+    // The view's next responder should be its controller.
+    [self assert:viewController equals:[view nextResponder] message:@"The view controller should be the next responder of its view."];
+    // The controller's next responder should be its view's superview.
+    [self assert:superview equals:[viewController nextResponder] message:@"The view's superview should be the next responder of the view controller."];
+
+    // 4. Test that an action sent to the view is handled by the controller.
+    var wasHandled = [view tryToPerform:@selector(testAction:) with:nil];
+    [self assertTrue:wasHandled message:@"The action should be handled by the responder chain."];
+    [self assertTrue:testResponderChainActionCalled message:@"The view controller's action method should have been called."];
+
+    // 5. Test that the chain unwires correctly when the view is removed.
+    [view removeFromSuperview];
+    [self assert:nil equals:[viewController nextResponder] message:@"The next responder should be nil after the view is removed from its superview."];
+}
+
 @end
 
 @implementation ViewController : CPViewController
@@ -87,3 +116,14 @@ var methodsCalled;
     [methodsCalled addObject:_cmd];
 }
 @end
+
+@implementation ResponderTestViewController : CPViewController
+{
+}
+
+- (void)testAction:(id)sender
+{
+    testResponderChainActionCalled = YES;
+}
+
+@end