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NativeViewsAndBindings.xaml.cs
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NativeViewsAndBindings.xaml.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using NUnit.Framework;
using Xamarin.Forms;
using Xamarin.Forms.Core.UnitTests;
using Xamarin.Forms.Internals;
using Xamarin.Forms.Xaml.Internals;
namespace Xamarin.Forms.Xaml.UnitTests
{
public abstract class MockNativeView
{
public string Foo { get; set; }
public int Bar { get; set; }
public string Baz { get; set; }
}
public class MockUIView : MockNativeView
{
public IList<MockUIView> SubViews { get; set; }
}
class MockUIViewWrapper : View
{
public MockUIView NativeView { get; }
public MockUIViewWrapper(MockUIView nativeView)
{
NativeView = nativeView;
nativeView.TransferbindablePropertiesToWrapper(this);
}
protected override void OnBindingContextChanged()
{
NativeView.SetBindingContext(BindingContext, nv => nv.SubViews);
base.OnBindingContextChanged();
}
}
public class MockAndroidView : MockNativeView
{
public IList<MockAndroidView> SubViews { get; set; }
}
class MockAndroidViewWrapper : View
{
public MockAndroidView NativeView { get; }
public MockAndroidViewWrapper(MockAndroidView nativeView)
{
NativeView = nativeView;
nativeView.TransferbindablePropertiesToWrapper(this);
}
protected override void OnBindingContextChanged()
{
NativeView.SetBindingContext(BindingContext, nv => nv.SubViews);
base.OnBindingContextChanged();
}
}
public static class MockNativeViewExtensions
{
public static View ToView(this MockUIView nativeView)
{
return new MockUIViewWrapper(nativeView);
}
public static void SetBinding(this MockUIView target, string targetProperty, BindingBase binding, string updateSourceEventName = null)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding, updateSourceEventName);
}
internal static void SetBinding(this MockUIView target, string targetProperty, BindingBase binding, INotifyPropertyChanged propertyChanged)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding, propertyChanged);
}
public static void SetBinding(this MockUIView target, BindableProperty targetProperty, BindingBase binding)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding);
}
public static void SetValue(this MockUIView target, BindableProperty targetProperty, object value)
{
NativeBindingHelpers.SetValue(target, targetProperty, value);
}
public static void SetBindingContext(this MockUIView target, object bindingContext, Func<MockUIView, IEnumerable<MockUIView>> getChild = null)
{
NativeBindingHelpers.SetBindingContext(target, bindingContext, getChild);
}
internal static void TransferbindablePropertiesToWrapper(this MockUIView target, MockUIViewWrapper wrapper)
{
NativeBindingHelpers.TransferBindablePropertiesToWrapper(target, wrapper);
}
public static View ToView(this MockAndroidView nativeView)
{
return new MockAndroidViewWrapper(nativeView);
}
public static void SetBinding(this MockAndroidView target, string targetProperty, BindingBase binding, string updateSourceEventName = null)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding, updateSourceEventName);
}
internal static void SetBinding(this MockAndroidView target, string targetProperty, BindingBase binding, INotifyPropertyChanged propertyChanged)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding, propertyChanged);
}
public static void SetBinding(this MockAndroidView target, BindableProperty targetProperty, BindingBase binding)
{
NativeBindingHelpers.SetBinding(target, targetProperty, binding);
}
public static void SetValue(this MockAndroidView target, BindableProperty targetProperty, object value)
{
NativeBindingHelpers.SetValue(target, targetProperty, value);
}
public static void SetBindingContext(this MockAndroidView target, object bindingContext, Func<MockAndroidView, IEnumerable<MockAndroidView>> getChild = null)
{
NativeBindingHelpers.SetBindingContext(target, bindingContext, getChild);
}
internal static void TransferbindablePropertiesToWrapper(this MockAndroidView target, MockAndroidViewWrapper wrapper)
{
NativeBindingHelpers.TransferBindablePropertiesToWrapper(target, wrapper);
}
}
public class MockIosNativeValueConverterService : INativeValueConverterService
{
public bool ConvertTo(object value, Type toType, out object nativeValue)
{
nativeValue = null;
if (typeof(MockUIView).IsInstanceOfType(value) && toType.IsAssignableFrom(typeof(View))) {
nativeValue = ((MockUIView)value).ToView();
return true;
}
return false;
}
}
public class MockAndroidNativeValueConverterService : INativeValueConverterService
{
public bool ConvertTo(object value, Type toType, out object nativeValue)
{
nativeValue = null;
if (typeof(MockAndroidView).IsInstanceOfType(value) && toType.IsAssignableFrom(typeof(View))) {
nativeValue = ((MockAndroidView)value).ToView();
return true;
}
return false;
}
}
public class MockIosNativeBindingService : INativeBindingService
{
public bool TrySetBinding(object target, string propertyName, BindingBase binding)
{
var view = target as MockUIView;
if (view == null)
return false;
if (target.GetType().GetProperty(propertyName)?.GetMethod == null)
return false;
view.SetBinding(propertyName, binding);
return true;
}
public bool TrySetBinding(object target, BindableProperty property, BindingBase binding)
{
var view = target as MockUIView;
if (view == null)
return false;
view.SetBinding(property, binding);
return true;
}
public bool TrySetValue(object target, BindableProperty property, object value)
{
var view = target as MockUIView;
if (view == null)
return false;
view.SetValue(property, value);
return true;
}
}
public class MockAndroidNativeBindingService : INativeBindingService
{
public bool TrySetBinding(object target, string propertyName, BindingBase binding)
{
var view = target as MockAndroidView;
if (view == null)
return false;
view.SetBinding(propertyName, binding);
return true;
}
public bool TrySetBinding(object target, BindableProperty property, BindingBase binding)
{
var view = target as MockAndroidView;
if (view == null)
return false;
view.SetBinding(property, binding);
return true;
}
public bool TrySetValue(object target, BindableProperty property, object value)
{
var view = target as MockAndroidView;
if (view == null)
return false;
view.SetValue(property, value);
return true;
}
}
public partial class NativeViewsAndBindings : ContentPage
{
public NativeViewsAndBindings()
{
InitializeComponent();
}
public NativeViewsAndBindings(bool useCompiledXaml)
{
//this stub will be replaced at compile time
}
[TestFixture]
public class Tests
{
[SetUp]
public void SetUp()
{
Device.PlatformServices = new MockPlatformServices();
}
[TearDown]
public void TearDown()
{
Device.PlatformServices = null;
}
void SetUpPlatform(string platform)
{
((MockPlatformServices)Device.PlatformServices).RuntimePlatform = platform;
if (platform == Device.iOS) {
DependencyService.Register<INativeValueConverterService, MockIosNativeValueConverterService>();
DependencyService.Register<INativeBindingService, MockIosNativeBindingService>();
} else if (platform == Device.Android) {
DependencyService.Register<INativeValueConverterService, MockAndroidNativeValueConverterService>();
DependencyService.Register<INativeBindingService, MockAndroidNativeBindingService>();
}
}
[TestCase(false, Device.iOS)]
[TestCase(false, Device.Android)]
//[TestCase(true)]
public void NativeInContentView(bool useCompiledXaml, string platform)
{
SetUpPlatform(platform);
var layout = new NativeViewsAndBindings(useCompiledXaml);
layout.BindingContext = new {
Baz = "Bound Value",
VerticalOption=LayoutOptions.EndAndExpand
};
var view = layout.view0;
Assert.NotNull(view.Content);
MockNativeView nativeView = null;
if (platform == Device.iOS) {
Assert.That(view.Content, Is.TypeOf<MockUIViewWrapper>());
Assert.That(((MockUIViewWrapper)view.Content).NativeView, Is.TypeOf<MockUIView>());
nativeView = ((MockUIViewWrapper)view.Content).NativeView;
} else if (platform == Device.Android) {
Assert.That(view.Content, Is.TypeOf<MockAndroidViewWrapper>());
Assert.That(((MockAndroidViewWrapper)view.Content).NativeView, Is.TypeOf<MockAndroidView>());
nativeView = ((MockAndroidViewWrapper)view.Content).NativeView;
}
Assert.AreEqual("foo", nativeView.Foo);
Assert.AreEqual(42, nativeView.Bar);
Assert.AreEqual("Bound Value", nativeView.Baz);
Assert.AreEqual(LayoutOptions.End, view.Content.GetValue(View.HorizontalOptionsProperty));
Assert.AreEqual(LayoutOptions.EndAndExpand, view.Content.GetValue(View.VerticalOptionsProperty));
}
}
}
}