1 files changed, 165 insertions, 0 deletions
diff --git a/Xamarin.Forms.Pages.UnitTests/DataPageTests.cs b/Xamarin.Forms.Pages.UnitTests/DataPageTests.cs
new file mode 100644
index 00000000..49fe38b2
--- /dev/null
+++ b/Xamarin.Forms.Pages.UnitTests/DataPageTests.cs
@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using Xamarin.Forms.Core.UnitTests;
+
+namespace Xamarin.Forms.Pages.UnitTests
+{
+	[TestFixture]
+	public class DataPageTests
+	{
+		[SetUp]
+		public void Setup ()
+		{
+			Device.PlatformServices = new MockPlatformServices ();
+		}
+
+		[TearDown]
+		public void TearDown ()
+		{
+			Device.PlatformServices = null;
+		}
+
+		class TestDataPage : DataPage
+		{
+			public static readonly BindableProperty NameProperty =
+				BindableProperty.Create (nameof (Name), typeof (string), typeof (TestDataPage), null);
+
+			public string Name
+			{
+				get { return (string)GetValue (NameProperty); }
+				set { SetValue (NameProperty, value); }
+			}
+
+			public TestDataPage ()
+			{
+				SetBinding (NameProperty, new DataSourceBinding ("Name"));
+			}
+		}
+
+		class DataSource : BaseDataSource
+		{
+			ObservableCollection<IDataItem> data = new ObservableCollection<IDataItem> (); 
+			protected override Task<IList<IDataItem>> GetRawData ()
+			{
+				return Task.FromResult<IList<IDataItem>> (data);
+			}
+
+			protected override object GetValue (string key)
+			{
+				var target = data.FirstOrDefault (d => d.Name == key);
+				if (target == null)
+					throw new KeyNotFoundException ();
+				return target.Value;
+			}
+
+			protected override bool SetValue (string key, object value)
+			{
+				var target = data.FirstOrDefault (d => d.Name == key);
+				if (target == null)
+					data.Add (new DataItem (key, value));
+				else if (target.Value == value)
+					return false;
+				else
+					target.Value = value;
+				return true;
+			}
+		}
+
+		[Test]
+		public void DefaultBindingsLoad ()
+		{
+			IDataSource dataSource = new DataSource ();
+			dataSource["Name"] = "Jason";
+
+			var detailpage = new TestDataPage ();
+			detailpage.Platform = new UnitPlatform ();
+			detailpage.DataSource = dataSource;
+
+			Assert.AreEqual ("Jason", detailpage.Name);
+		}
+
+		[Test]
+		public void RebindingDataSource ()
+		{
+			IDataSource dataSource = new DataSource ();
+			dataSource["UserName"] = "Jason";
+
+			var detailpage = new TestDataPage ();
+			detailpage.Platform = new UnitPlatform ();
+			detailpage.SetBinding (TestDataPage.NameProperty, new DataSourceBinding ("UserName"));
+			detailpage.DataSource = dataSource;
+
+			Assert.AreEqual ("Jason", detailpage.Name);
+		}
+
+		[Test]
+		public void RebindingDataSourceNotMasked ()
+		{
+			IDataSource dataSource = new DataSource ();
+			dataSource["UserName"] = "Jason";
+
+			var detailpage = new TestDataPage ();
+			detailpage.Platform = new UnitPlatform ();
+			detailpage.DataSource = dataSource;
+
+			detailpage.SetBinding (TestDataPage.NameProperty, new DataSourceBinding ("UserName"));
+			Assert.AreEqual ("Jason", detailpage.Name);
+
+			Assert.AreEqual (1, detailpage.DataSource.MaskedKeys.Count ());
+		}
+
+		[Test]
+		public void UpdateDataSource ()
+		{
+			IDataSource dataSource = new DataSource ();
+			dataSource["UserName"] = "Jason";
+
+			var detailpage = new TestDataPage ();
+			detailpage.Platform = new UnitPlatform ();
+			detailpage.SetBinding (TestDataPage.NameProperty, new DataSourceBinding ("UserName"));
+			detailpage.DataSource = dataSource;
+
+			dataSource["UserName"] = "Jerry";
+
+			Assert.AreEqual ("Jerry", detailpage.Name);
+		}
+
+		[Test]
+		public void MaskedItemsNotInData ()
+		{
+			IDataSource dataSource = new DataSource ();
+			dataSource["Name"] = "Jason";
+			dataSource["Other"] = "Foo";
+
+			var detailpage = new TestDataPage ();
+			detailpage.Platform = new UnitPlatform ();
+			detailpage.DataSource = dataSource;
+
+			Assert.AreEqual ("Jason", detailpage.Name);
+
+			Assert.AreEqual (1, detailpage.Data.Count ());
+			Assert.AreEqual ("Other", detailpage.Data.First ().Name);
+		}
+
+		[Test]
+		public void TwoWayDataSourceBinding ()
+		{
+			IDataSource dataSource = new DataSource ();
+			dataSource["UserName"] = "Jason";
+
+			var detailpage = new TestDataPage ();
+			detailpage.Platform = new UnitPlatform ();
+			detailpage.SetBinding (TestDataPage.NameProperty, new DataSourceBinding ("UserName", BindingMode.TwoWay));
+			detailpage.DataSource = dataSource;
+
+			((IElementController)detailpage).SetValueFromRenderer (TestDataPage.NameProperty, "John");
+
+			Assert.AreEqual ("John", dataSource["UserName"]);
+		}
+	}
+}