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using System;
using NUnit.Framework;
using Xamarin.Forms;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class DataTemplateSelectorTests : BaseTestFixture
{
[TearDown]
public override void TearDown()
{
base.TearDown();
Device.PlatformServices = null;
}
[SetUp]
public override void Setup()
{
base.Setup();
Device.PlatformServices = new MockPlatformServices();
}
class TemplateOne : DataTemplate
{
public TemplateOne () : base (typeof (ViewCell))
{
}
}
class TemplateTwo : DataTemplate
{
public TemplateTwo () : base (typeof (EntryCell))
{
}
}
class TestDTS : DataTemplateSelector
{
public TestDTS ()
{
templateOne = new TemplateOne ();
templateTwo = new TemplateTwo ();
}
protected override DataTemplate OnSelectTemplate (object item, BindableObject container)
{
if (item is double)
return templateOne;
if (item is byte)
return new TestDTS ();
return templateTwo;
}
readonly DataTemplate templateOne;
readonly DataTemplate templateTwo;
}
[Test]
public void Constructor ()
{
var dts = new TestDTS ();
}
[Test]
public void ReturnsCorrectType ()
{
var dts = new TestDTS ();
Assert.IsInstanceOf<TemplateOne> (dts.SelectTemplate (1d, null));
Assert.IsInstanceOf<TemplateTwo> (dts.SelectTemplate ("test", null));
}
[Test]
public void ListViewSupport ()
{
var listView = new ListView(ListViewCachingStrategy.RecycleElement);
listView.ItemsSource = new object[] { 0d, "test" };
listView.ItemTemplate = new TestDTS ();
Assert.IsInstanceOf<ViewCell> (listView.TemplatedItems[0]);
Assert.IsInstanceOf<EntryCell> (listView.TemplatedItems[1]);
}
[Test]
public void NestingThrowsException ()
{
var dts = new TestDTS ();
Assert.Throws<NotSupportedException> (() => dts.SelectTemplate ((byte)0, null));
}
}
}
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