[mwaoe09wteo]

Can you elaborate on what's missing? I do a lot of graphics work, and their macOS debugging tools for OpenGL were terrible, but the ones for Metal (which came out first on iOS) are pretty cool! I also use Instruments a lot and some of the other more esoteric tools supplied with Xcode. Not to mention the static analyzer, Address Sanitizer, and lately the Undefined Behavior Sanitizer. But I'd love to have even more tools! What else is out there that they don't supply?

[mackey]

I am talking specifically about unit testing, ui testing, integration testing and then supporting those tools in some type of ci system.

And to be clear, they provide these things in the form of XCTest, XCUITest, and Xcode bots, but they aren't good enough. Tons of resources have been spent by the community and major corporations trying to fill in the gaps and offer useful alternatives, but the closed nature of Xcode and its build environment make this difficult.

[mapmap]

Personally, I've found XCTest to be pretty good - especially performance testing.

[mackey]

It's fine, although its amazing how long it took to get native async testing (iOS 8?).