• I have read CONTRIBUTING and have done my best to follow them.

Hi, thanks for making Quick and Nimble,

I don't write any swift code in my project without some examples/tests in Quick/Nimble. I feature that I was missing from how I could use e.g. Jasmine or scalatest, was to do data-driven specs.

For a long period I thought it wasn't possible as I couldn't find any examples in the documentation or on the internet. A short while back, I thought I'd give it one more try and if there was something preventing success, file an issue. To my great joy, I found a way that just worked. :)
(I wrote about this on my blog found here)

if the maintainers consider this way of writing tests supported over time and versions, I am willing put together a documentation PR including an example of data-drive tests using Quick for fellow coders' benefit.

What is your view?

Code example for how to drive tests with data

import Quick
import Nimble

func double(_ value : Int) -> Int { return 2*value }

class QuickDataDrivenTests: QuickSpec {
    override func spec() {
        describe("the double function") {
            let specified_examples : [(input: Int, output: Int)] = [
                (input: 0, output: 0),
                (input: 1, output: 2),
                (input: 2, output: 4)
            ]
            specified_examples.forEach { (input: Int, output: Int) in
                context("for input \(input) and output \(output) ") {
                    var for_each_executed_with_input : Int?
                    beforeEach {
                        for_each_executed_with_input = input
                    }
                    it("should execute the beforeEach") {
                        expect(for_each_executed_with_input).toNot(beNil())
                    }
                    it("should execute the before each with each entry") {
                        expect(for_each_executed_with_input).to(equal(input))
                    }
                    it("should double the input for output") {
                        expect(double(input)).to(equal(output))
                    }
                }
            }
        }
    }
}

Versions I tested it on

• Quick: 2.0
• Nimble: Nimble 8.0
• Xcode Version: 10.2.1
• Swift Version: 4.2 and 5.0

Please also mention which package manager you used and its version. Delete the
other package managers in this list:

• Cocoapods: 1.5.3