UiTests target + sample tests

[reflash]

closes #153

fake build target runuitests
All the details for installation are mentioned in README now.
Unfortunately stopping of client/server is a bit quirky, but I think that can be solved as a separate task

[psfinaki]

I am curious about Expecto, but honestly I think it would be confusing to have different testing frameworks in one project, so let's switch to xUnit for now :) Looks like definitely possible, e.g. here

[reflash]

this link is quite old, I've tried to match it with current api, but it seems I won't be able to run it the same way

[psfinaki]

Sooooo... this seems to work (instead of both Runner and Tests):

module Client.UiTests.Tests

open canopy.classic
open canopy.types
open System
open Xunit

type Fixture() =
    do
        //start Chrome // Use this if you want to see your tests in the browser
        start ChromeHeadless
        resize (1280, 960)

let serverUrl = Environment.GetEnvironmentVariable("SERVER_URL")

let startApp() =
    url serverUrl
    waitForElement("#elmish-app")

type Tests() = 
    interface IClassFixture<Fixture>        

    [<Fact>]
    member _.``Soundcheck - server is online``() =
        startApp()
        
    [<Fact>]
    member _.``Validate word is loaded``() =
        startApp()
        
        click (first ".link-block")
        
        let taskText = (element ".task-label").GetAttribute("innerText")
        
        Assert.NotNull taskText

[reflash]

does this Fixture make it run only once? I'll modify the code then or do you have a working config already?

[psfinaki]

Fixture code runs only once prior to running all tests.