This helper is installable with SPM, see GitHub repo

I’ve been using the Swift Testing framework more. Despite my previous grumble I do like the arguments: feature of the @Test macro and how much it can clean up tests:

@Test(arguments: [
	(true, "bob", 38),
	(false, "sue", 45)
])
func testUserPermissions(isBasketEmpty: Bool, username: String, age: Int) {
    #expect( ... )
}

The ability to supply a list of parameter variants to test is very useful. I think it tends to result in more exhaustive tests because of ease of use.

But being able to easily whack in a list of argument variants soon reveals a slight annoyance. It’s not unusual to end up with a test like this:

The orth concept in 2D geometry and graphics is where, given some vector, we find a vector (line) that is at right angles to the original. We have a tiny bit of choice about how to do it – we can pick a vector to the left, or to the right – but it’s very simple (more here).

The equivalent function in 3D is one of those odd little problems where you are given some freedom with the answer, and you don’t really care about that freedom – just pick something please! – but you’re made to care about it anyway and do what feels like too much thinking. Bah!¹

I want to mention the concept of walkabout and then go for a meander with the ohmaps idea. The idea is to eventually look at if the ohmap extends from resistance (DC behaviour circuits) to impedence (AC circuits) in any useful way.