View model unit tests added.

Author: David Britch

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Behaviors/EventToCommandBehavior.cs

@@ -31,7 +31,7 @@ public class EventToCommandBehavior : BindableBehavior<View>
             BindableProperty.CreateAttached("EventArgsConverterParameter", typeof(object), typeof(EventToCommandBehavior), null,
                 BindingMode.OneWay);
 
-        private Delegate _handler;
+        protected Delegate _handler;
         private EventInfo _eventInfo;
 
         public string EventName

src/Mobile/eShopOnContainers/eShopOnContainers.TestRunner.Droid/MainActivity.cs

@@ -14,7 +14,7 @@ protected override void OnCreate(Bundle bundle)
             AddExecutionAssembly(typeof(ExtensibilityPointFactory).Assembly);
 
             // or in any reference assemblies getting the Assembly from any type/class	
-            AddTestAssembly(typeof(UnitTests.DummyTests).Assembly);
+			AddTestAssembly(typeof(UnitTests.CatalogViewModelTests).Assembly);
 
             base.OnCreate(bundle);
         }

src/Mobile/eShopOnContainers/eShopOnContainers.TestRunner.Droid/eShopOnContainers.TestRunner.Droid.csproj

@@ -20,6 +20,7 @@
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
+    <AndroidTlsProvider></AndroidTlsProvider>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

src/Mobile/eShopOnContainers/eShopOnContainers.TestRunner.iOS/AppDelegate.cs

@@ -17,7 +17,7 @@ public override bool FinishedLaunching(UIApplication app, NSDictionary options)
 
             // Otherwise you need to ensure that the test assemblies will 
             // become part of the app bundle
-            AddTestAssembly(typeof(UnitTests.DummyTests).Assembly);
+			AddTestAssembly(typeof(UnitTests.CatalogViewModelTests).Assembly);
 
             return base.FinishedLaunching(app, options);
         }

src/Mobile/eShopOnContainers/eShopOnContainers.TestRunner.iOS/eShopOnContainers.TestRunner.iOS.csproj

@@ -155,6 +155,12 @@
       <HintPath>..\..\..\..\packages\xunit.runner.utility.2.2.0-beta4-build3444\lib\netstandard1.1\xunit.runner.utility.dotnet.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="Plugin.Settings.Abstractions">
+      <HintPath>..\..\..\..\packages\Xam.Plugins.Settings.2.6.0.12-beta\lib\Xamarin.iOS10\Plugin.Settings.Abstractions.dll</HintPath>
+    </Reference>
+    <Reference Include="Plugin.Settings">
+      <HintPath>..\..\..\..\packages\Xam.Plugins.Settings.2.6.0.12-beta\lib\Xamarin.iOS10\Plugin.Settings.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Content Include="AppDelegate.cs.txt" />

src/Mobile/eShopOnContainers/eShopOnContainers.TestRunner.iOS/packages.config

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="CommonServiceLocator" version="1.3" targetFramework="xamarinios10" />
+  <package id="Xam.Plugins.Settings" version="2.6.0.12-beta" targetFramework="xamarinios10" />
   <package id="Xamarin.Forms" version="2.3.3.175" targetFramework="xamarinios10" />
   <package id="xunit" version="2.2.0-beta4-build3444" targetFramework="xamarinios10" />
   <package id="xunit.abstractions" version="2.0.1" targetFramework="xamarinios10" />

src/Mobile/eShopOnContainers/eShopOnContainers.UnitTests/Behaviors/EventToCommandBehaviorTests.cs

@@ -0,0 +1,120 @@
+using Xunit;
+using Xamarin.Forms;
+using System;
+using System.Globalization;
+
+namespace eShopOnContainers.UnitTests
+{
+	public class EventToCommandBehaviorTests
+	{
+		[Fact]
+		public void InvalidEventNameShouldThrowArgumentExceptionText()
+		{
+			var behavior = new MockEventToCommandBehavior
+			{
+				EventName = "OnItemTapped"
+			};
+			var listView = new ListView();
+
+			Assert.Throws<ArgumentException>(() => listView.Behaviors.Add(behavior));
+		}
+
+		[Fact]
+		public void CommandExecutedWhenEventFiresText()
+		{
+			bool executedCommand = false;
+			var behavior = new MockEventToCommandBehavior
+			{
+				EventName = "ItemTapped",
+				Command = new Command(() =>
+				{
+					executedCommand = true;
+				})
+			};
+			var listView = new ListView();
+			listView.Behaviors.Add(behavior);
+
+			behavior.RaiseEvent(listView, null);
+
+			Assert.True(executedCommand);
+		}
+
+		[Fact]
+		public void CommandCanExecuteTest()
+		{
+			var behavior = new MockEventToCommandBehavior
+			{
+				EventName = "ItemTapped",
+				Command = new Command(() => Assert.True(false), () => false)
+			};
+			var listView = new ListView();
+			listView.Behaviors.Add(behavior);
+
+			behavior.RaiseEvent(listView, null);
+		}
+
+		[Fact]
+		public void CommandCanExecuteWithParameterShouldNotExecuteTest()
+		{
+			bool shouldExecute = false;
+			var behavior = new MockEventToCommandBehavior
+			{
+				EventName = "ItemTapped",
+				CommandParameter = shouldExecute,
+				Command = new Command<string>(o => Assert.True(false), o => o.Equals(true))
+			};
+			var listView = new ListView();
+			listView.Behaviors.Add(behavior);
+
+			behavior.RaiseEvent(listView, null);
+		}
+
+		[Fact]
+		public void CommandWithConverterTest()
+		{
+			const string item = "ItemProperty";
+			bool executedCommand = false;
+			var behavior = new MockEventToCommandBehavior
+			{
+				EventName = "ItemTapped",
+				EventArgsConverter = new ItemTappedEventArgsConverter(false),
+				Command = new Command<string>(o =>
+				{
+					executedCommand = true;
+					Assert.NotNull(o);
+					Assert.Equal(item, o);
+				})
+			};
+			var listView = new ListView();
+			listView.Behaviors.Add(behavior);
+
+			behavior.RaiseEvent(listView, new ItemTappedEventArgs(listView, item));
+
+			Assert.True(executedCommand);
+		}
+
+		private class ItemTappedEventArgsConverter : IValueConverter
+		{
+			private readonly bool _returnParameter;
+
+			public bool HasConverted { get; private set; }
+
+			public ItemTappedEventArgsConverter(bool returnParameter)
+			{
+				_returnParameter = returnParameter;
+			}
+
+			public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+			{
+				HasConverted = true;
+				return _returnParameter ? parameter : (value as ItemTappedEventArgs)?.Item;
+			}
+
+			public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+			{
+				throw new NotImplementedException();
+			}
+		}
+	}
+
+}

src/Mobile/eShopOnContainers/eShopOnContainers.UnitTests/DummyTests.cs

@@ -0,0 +1,12 @@
+using eShopOnContainers.Core.Behaviors;
+
+namespace eShopOnContainers.UnitTests
+{
+	public class MockEventToCommandBehavior : EventToCommandBehavior
+	{
+		public void RaiseEvent(params object[] args)
+		{
+			_handler.DynamicInvoke(args);
+		}
+	}
+}