     
     func testInitializations() {
         let stack1 = StackViewController()
-        XCTAssertNotNil(stack1, obviously)
-        XCTAssert(stack1.viewControllers.isEmpty, obviously)
+        XCTAssertNotNil(stack1)
+        XCTAssert(stack1.viewControllers.isEmpty)
         
         let root = UIViewController()
         let stack2 = StackViewController(rootViewController: root)
-        XCTAssertNotNil(stack2, obviously)
-        XCTAssert(stack2.viewControllers.count == 1, obviously)
-        XCTAssert(stack2.viewControllers == [root], obviously)
-        XCTAssert(stack2.rootViewController == root, obviously)
+        XCTAssertNotNil(stack2)
+        XCTAssert(stack2.viewControllers.count == 1)
+        XCTAssert(stack2.viewControllers == [root])
+        XCTAssert(stack2.rootViewController == root)
         
-        XCTAssert(root.stackViewController == stack2, obviously)
+        XCTAssert(root.stackViewController == stack2)
     }
     
     func testPushViewController() {
         let stack = StackViewController()
         
         stack.pushViewController(a, animated: false)
-        XCTAssert(stack.topViewController! == a, obviously)
+        XCTAssert(stack.topViewController! == a)
         
         stack.pushViewController(b, animated: false)
-        XCTAssert(stack.topViewController! == b, obviously)
+        XCTAssert(stack.topViewController! == b)
         
         stack.pushViewController(b, animated: false)
-        XCTAssert(stack.topViewController! == b, obviously)
+        XCTAssert(stack.topViewController! == b)
     }
     
     func testPopViewController() {

        for _ in 0..<10 {
            let viewController = UIViewController()
            viewControllers.append(viewController)
            XCTAssert(viewController.stackViewController == nil, obviously)
        }
        
        let stack = StackViewController()
        
        stack.viewControllers = viewControllers
        for viewController in viewControllers {
            XCTAssertNotNil(viewController.stackViewController, obviously)
            XCTAssert(viewController.stackViewController! == stack, obviously)
        }
        
        stack.popViewControllerAnimated(false)
        XCTAssertNil(viewControllers.last!.stackViewController, obviously)
        
        stack.viewControllers = []
        for viewController in viewControllers {
            XCTAssertNil(viewController.stackViewController, obviously)
        }
    }
    


class StackViewControllerDemoTests: XCTestCase {
    
    let a = UIViewController()
    let b = UIViewController()
    let c = UIViewController()
