Disabling waiting for idle state in UI testing of iOS apps

Question

Basically the problem is the same as this one: XCTestCase: Wait for app to idle

I am using perpetually repeating \"background animations\" in my views. The !@#$#$&@

Answer 1

You actually can disable wait for app to idle. This is a hack and may not be stable. With animations disabled, and this hack enabled I am seeing about a 20% performance gain (on top of the performance boost from disabling animations).

All you have to do is swizzle out the method that is called to idle the app and no-op it. That method is XCUIApplicationProcess waitForQuiescenceIncludingAnimationsIdle:

Here is my working solution in swift 3 - there is likely a better way but this works for a proof of concept.

Extend the XCTestCase class. Ill call mine MyTestCase

static var swizzledOutIdle = false

override func setUp() {
    if !MyTestCase.swizzledOutIdle { // ensure the swizzle only happens once
        let original = class_getInstanceMethod(objc_getClass("XCUIApplicationProcess") as! AnyClass, Selector(("waitForQuiescenceIncludingAnimationsIdle:")))
        let replaced = class_getInstanceMethod(type(of: self), #selector(MyTestCase.replace))
        method_exchangeImplementations(original, replaced)
        MyTestCase.swizzledOutIdle = true
    }
    super.setUp()
}

@objc func replace() {
    return
}

Note wait for app to idle will no longer appear in the logs.