I wrote a small class extension for UITableViewRowAction, while doing my Unit Test I've notice that the instance created with the extension 'init' method were alive longuer that I would have expected.
So I've trim down the implementation to the bare minimum to test that difference.
public extension UITableViewRowAction {
public convenience init(title: String!, style: UITableViewRowActionStyle, exposedHandler: (UITableViewRowAction!, NSIndexPath!) -> Void) {
self.init(style: style, title: title, handler: exposedHandler)
}
}
class UITableViewRowAction_test: XCTestCase {
func test_deallocationOfStoredItems() {
weak var a1 : UITableViewRowAction?
weak var a2 : UITableViewRowAction?
if true {
var action : UITableViewRowAction?
action = UITableViewRowAction(title: "title", style: .Normal) { (a: UITableViewRowAction!, b: NSIndexPath!) -> Void in }
a1 = action
action = UITableViewRowAction(style: .Normal, title: "title", handler: { (a: UITableViewRowAction!, b: NSIndexPath!) -> Void in })
a2 = action
println("here a2 and a1 are still alive")
}
println("Here a2 == nil, but a1 is still alive")
println("I would expect both to behave the same")
XCTAssertTrue(a1 == nil, "This is failing")
XCTAssertTrue(a2 == nil, "This is passing")
}
}Can someone explain to me why the 2 assert don't gave the same result?
---------------------------------------------------
Addition
If I reverse the a1 and a2 creation the result are reverse as well.
It look like the first instance created in that 'if true' will live longuer
I have the same problem if I create only 1 elements, it is still not nil when it get out of scope.
public extension UITableViewRowAction {
public convenience init(title: String!, style: UITableViewRowActionStyle, exposedHandler: (UITableViewRowAction!, NSIndexPath!) -> Void) {
self.init(style: style, title: title, handler: exposedHandler)
}
}
class UITableViewRowAction_test: XCTestCase {
func test_deallocationOfStoredItems() {
weak var a1 : UITableViewRowAction?
weak var a2 : UITableViewRowAction?
if true {
var action : UITableViewRowAction?
action = UITableViewRowAction(style: .Normal, title: "title", handler: { (a: UITableViewRowAction!, b: NSIndexPath!) -> Void in })
a2 = action
action = UITableViewRowAction(title: "title", style: .Normal) { (a: UITableViewRowAction!, b: NSIndexPath!) -> Void in }
a1 = action
}
XCTAssertTrue(a1 == nil, "This is now passing")
XCTAssertTrue(a2 == nil, "This is now failling")
}
}