Start writing unit tests for the MessageBox stuff

Stylet/Stylet.csproj

@@ -90,7 +90,7 @@
     <Compile Include="StyletIoC\StyletIoCBuilder.cs" />
     <Compile Include="StyletIoC\StyletIoCContainer.cs" />
     <Compile Include="StyletIoC\UnboundGeneric.cs" />
-    <Compile Include="Xaml\IconConverter.cs" />
+    <Compile Include="Xaml\IconToBitmapSourceConverter.cs" />
     <Compile Include="Xaml\View.cs" />
     <Compile Include="ViewManager.cs" />
     <Compile Include="WindowManager.cs" />

Stylet/Xaml/EqualityConverter.cs

@@ -29,6 +29,8 @@ namespace Stylet.Xaml
 
         public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
         {
+            if (values == null || values.Length == 0)
+                return null;
             var first = values.FirstOrDefault();
             var result = values.Skip(1).All(x => first.Equals(x));
             return this.Invert ? !result : result;

StyletUnitTests/EqualityConverterTests.cs

@@ -0,0 +1,92 @@
+using NUnit.Framework;
+using Stylet.Xaml;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StyletUnitTests
+{
+    [TestFixture]
+    public class EqualityConverterTests
+    {
+        private EqualityConverter converter;
+
+        [SetUp]
+        public void SetUp()
+        {
+            this.converter = new EqualityConverter();
+        }
+
+        [Test]
+        public void InstanceReturnsASingletonInstance()
+        {
+            Assert.NotNull(EqualityConverter.Instance);
+            Assert.AreEqual(EqualityConverter.Instance, EqualityConverter.Instance);
+        }
+
+        [Test]
+        public void ReturnsNullIfNullPassed()
+        {
+            Assert.Null(this.converter.Convert(null, null, null, null));
+        }
+
+        [Test]
+        public void ReturnsNullIfEmptyArrayPassed()
+        {
+            Assert.Null(this.converter.Convert(new object[0], null, null, null));
+        }
+
+        [Test]
+        public void ReturnsTrueIfASingleItemGiven()
+        {
+            var value = this.converter.Convert(new object[] { 5 }, null, null, null);
+            Assert.IsInstanceOf<bool>(value);
+            Assert.True((bool)value);
+        }
+
+        [Test]
+        public void ReturnsTrueIfAllItemsAreEqual()
+        {
+            var obj = new object();
+            var value = this.converter.Convert(new[] { obj, obj, obj }, null, null, null);
+            Assert.IsInstanceOf<bool>(value);
+            Assert.True((bool)value);
+        }
+
+        [Test]
+        public void ReturnsFalseIfAllItemsAreEqualAndInvertIsTrue()
+        {
+            var obj = new object();
+            this.converter.Invert = true;
+            var value = this.converter.Convert(new[] { obj, obj, obj }, null, null, null);
+            Assert.IsInstanceOf<bool>(value);
+            Assert.False((bool)value);
+        }
+
+        [Test]
+        public void ReturnsFalseIfOneItemsDiffers()
+        {
+            var obj = new object();
+            var value = this.converter.Convert(new[] { obj, new object(), obj }, null, null, null);
+            Assert.IsInstanceOf<bool>(value);
+            Assert.False((bool)value);
+        }
+
+        [Test]
+        public void ReturnsTrueIfOneItemsDiffersAndInvertIsTrue()
+        {
+            var obj = new object();
+            var value = this.converter.Convert(new[] { obj, new object(), obj }, null, null, null);
+            Assert.IsInstanceOf<bool>(value);
+            Assert.False((bool)value);
+        }
+
+        [Test]
+        public void ConvertBackThrows()
+        {
+            Assert.Throws<NotImplementedException>(() => this.converter.ConvertBack(null, null, null, null));
+        }
+    }
+}

StyletUnitTests/MessageBoxTests.cs

@@ -0,0 +1,37 @@
+using Moq;
+using NUnit.Framework;
+using Stylet;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StyletUnitTests
+{
+    [TestFixture]
+    public class MessageBoxTests
+    {
+        [Test]
+        public void ShowMessageBoxShowsMessageBox()
+        {
+            var vm = new Mock<IMessageBoxViewModel>();
+            IoC.GetInstance = (o, k) =>
+            {
+                Assert.AreEqual(typeof(IMessageBoxViewModel), o);
+                Assert.AreEqual(null, k);
+                return vm.Object;
+            };
+
+            var windowManager = new Mock<IWindowManager>();
+
+            vm.SetupGet(x => x.ClickedButton).Returns(MessageBoxButtons.OK);
+            var result = MessageBoxWindowManagerExtensions.ShowMessageBox(windowManager.Object, "this is the text", "this is the title", MessageBoxButtons.OKCancel, System.Windows.MessageBoxImage.Exclamation, MessageBoxButtons.OK, MessageBoxButtons.Cancel);
+
+            vm.Verify(x => x.Setup("this is the text", "this is the title", MessageBoxButtons.OKCancel, System.Windows.MessageBoxImage.Exclamation, MessageBoxButtons.OK, MessageBoxButtons.Cancel));
+            windowManager.Verify(x => x.ShowDialog(vm.Object));
+
+            Assert.AreEqual(MessageBoxButtons.OK, result);
+        }
+    }
+}

StyletUnitTests/StyletUnitTests.csproj

@@ -63,6 +63,7 @@
     <Compile Include="ConductorOneActiveTests.cs" />
     <Compile Include="ConductorTests.cs" />
     <Compile Include="DebugConverterTests.cs" />
+    <Compile Include="EqualityConverterTests.cs" />
     <Compile Include="EventActionTests.cs" />
     <Compile Include="EventAggregatorTests.cs" />
     <Compile Include="ExecuteTests.cs" />
@@ -70,6 +71,7 @@
     <Compile Include="IoCTests.cs" />
     <Compile Include="LabelledValueTests.cs" />
     <Compile Include="LambdaComparerTests.cs" />
+    <Compile Include="MessageBoxTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="PropertyChangedBaseTests.cs" />
     <Compile Include="PropertyChangedExtensionsTests.cs" />