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using System;
using NUnit.Framework;
using System.Collections.Generic;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class PickerTests : BaseTestFixture
{
[Test]
public void TestSetSelectedIndexOnNullRows()
{
var picker = new Picker ();
Assert.IsEmpty (picker.Items);
Assert.AreEqual (-1, picker.SelectedIndex);
picker.SelectedIndex = 2;
Assert.AreEqual (-1, picker.SelectedIndex);
}
[Test]
public void TestSelectedIndexInRange ()
{
var picker = new Picker { Items = { "John", "Paul", "George", "Ringo" } };
picker.SelectedIndex = 2;
Assert.AreEqual (2, picker.SelectedIndex);
picker.SelectedIndex = 42;
Assert.AreEqual (3, picker.SelectedIndex);
picker.SelectedIndex = -1;
Assert.AreEqual (-1, picker.SelectedIndex);
picker.SelectedIndex = -42;
Assert.AreEqual (-1, picker.SelectedIndex);
}
[Test]
public void TestSelectedIndexChangedOnCollectionShrink()
{
var picker = new Picker { Items = { "John", "Paul", "George", "Ringo" }, SelectedIndex = 3 };
Assert.AreEqual (3, picker.SelectedIndex);
picker.Items.RemoveAt (3);
picker.Items.RemoveAt (2);
Assert.AreEqual (1, picker.SelectedIndex);
picker.Items.Clear ();
Assert.AreEqual (-1, picker.SelectedIndex);
}
}
}
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