Publishing

A wrapper for Publisher

@Publishing var sut = 1
var history: [String] = []
let cancelable = $sut.sink { history.append("sink \($0)") }
sut += 1
XCTAssertEqual(history, ["sink 1", "sink 2"])
cancelable.cancel()

Can be using as injection

struct TestingView {
    @Binded var i: Int
    func set(to int: inout Int) {
        int = i
    }
}

@Publishing var spy = 1
let sut = TestingView(i: $spy)
var target = 0
sut.set(to: &target)
XCTAssertEqual(spy, 1)
XCTAssertEqual(target, 1)
var history: [Int] = []
let cancelable = sut.$i.sink { value in
    history.append(value)
}
sut.set(2)
XCTAssertEqual(spy, 2)
XCTAssertEqual(history, [1,2])
cancelable.cancel()

Enjoy! 😃