mallibone

public class ViewNavigationService : INavigationService
{
    private readonly object _sync = new object();
    private readonly Dictionary<string, Type> _pagesByKey = new Dictionary<string, Type>();
    private readonly Stack<NavigationPage> _navigationPageStack =
        new Stack<NavigationPage>();
    private NavigationPage CurrentNavigationPage => _navigationPageStack.Peek();

    public void Configure(string pageKey, Type pageType)
    {

mallibone

public interface INavigationService
{
    string CurrentPageKey { get; }

    void Configure(string pageKey, Type pageType);
    Task GoBack();
    Task NavigateModalAsync(string pageKey, bool animated = true);
    Task NavigateModalAsync(string pageKey, object parameter, bool animated = true);
    Task NavigateAsync(string pageKey, bool animated = true);
    Task NavigateAsync(string pageKey, object parameter, bool animated = true);

mallibone

public partial class App : Application
{
    public App()
    {
        InitializeComponent();
        var mainPage = new NavigationPage(new MainPage());
        MainPage = mainPage;
    }

    // ....

mallibone

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard1.6</TargetFramework>
    <PackageTargetFallback>$(PackageTargetFallback);portable-win+net45+wp8+win81+wpa8</PackageTargetFallback>
  </PropertyGroup>

</Project>

mallibone

$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' 
. "$here\$sut"

$mockReply = @("Monday.txt", "Tuesday.txt", "Wednesday.txt")

Describe "HasEntryInDirectory" {
    Context "If the filename exists in the directory" {

        Mock Get-ChildItem {return $mockReply}

mallibone

$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' 
. "$here\$sut"

$mockReply = @("Monday.txt", "Tuesday.txt", "Wednesday.txt")

Describe "HasEntryInDirectory" {
    Context "If the filename exists in the directory" {

        Mock Get-ChildItem {return $mockReply}

mallibone

$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' 
. "$here\$sut"

$mockReply = @("Monday.txt", "Tuesday.txt", "Wednesday.txt")

Describe "HasEntryInDirectory" {
    Context "If the filename exists in the directory" {

        Mock Get-ChildItem {return $mockReply}

mallibone

function HasEntryInDirectory($filename, $path) {
    $entries = Get-ChildItem -Path $path
    $entries -contains $filename
}

mallibone

using System;
using System.IO;
using System.Linq;
using Moq;
using Xunit;

namespace CSharpSample
{
    public interface IDirectory
    {

mallibone

$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' 
. "$here\$sut"

Describe "IsEvenNumber" {
    Context "When an even number is passed to the function" {

        $result = IsEvenNumber(42)

        It "Returns true" {