maui-linux/Xamarin.Forms.Core.UnitTests/CellTests.cs

191 строка
4.3 KiB
C#

using NUnit.Framework;
using System;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class CellTests : BaseTestFixture
{
internal class TestCell : Cell
{
public bool OnAppearingSent { get; set; }
public bool OnDisappearingSent { get; set; }
protected override void OnAppearing ()
{
base.OnAppearing ();
OnAppearingSent = true;
}
protected override void OnDisappearing ()
{
base.OnDisappearing ();
OnDisappearingSent = true;
}
}
[Test]
public void Selected ()
{
var cell = new TestCell ();
bool tapped = false;
cell.Tapped += (sender, args) => tapped = true;
cell.OnTapped();
Assert.IsTrue (tapped);
}
[Test]
public void AppearingEvent ()
{
var cell = new TestCell ();
bool emitted = false;
cell.Appearing += (sender, args) => emitted = true;
cell.SendAppearing ();
Assert.True (emitted);
Assert.True (cell.OnAppearingSent);
Assert.False (cell.OnDisappearingSent);
}
[Test]
public void DisappearingEvent ()
{
var cell = new TestCell ();
bool emitted = false;
cell.Disappearing += (sender, args) => emitted = true;
cell.SendDisappearing ();
Assert.True (emitted);
Assert.False (cell.OnAppearingSent);
Assert.True (cell.OnDisappearingSent);
}
[Test]
public void TestBindingContextPropagationOnImageCell ()
{
var context = new object ();
var cell = new ImageCell ();
cell.BindingContext = context;
var source = new FileImageSource ();
cell.ImageSource = source;
Assert.AreSame (context, source.BindingContext);
cell = new ImageCell ();
source = new FileImageSource ();
cell.ImageSource = source;
cell.BindingContext = context;
Assert.AreSame (context, source.BindingContext);
}
[Test]
public void HasContextActions()
{
bool changed = false;
var cell = new TextCell();
cell.PropertyChanged += (sender, args) => {
if (args.PropertyName == "HasContextActions")
changed = true;
};
Assert.That (cell.HasContextActions, Is.False);
Assert.That (changed, Is.False);
var collection = cell.ContextActions;
Assert.That (cell.HasContextActions, Is.False);
Assert.That (changed, Is.False);
collection.Add (new MenuItem());
Assert.That (cell.HasContextActions, Is.True);
Assert.That (changed, Is.True);
}
[Test]
public void MenuItemsGetBindingContext()
{
var cell = new TextCell {
ContextActions = {
new MenuItem ()
}
};
object bc = new object ();
cell.BindingContext = bc;
Assert.That (cell.ContextActions [0].BindingContext, Is.SameAs (bc));
cell = new TextCell { BindingContext = new object () };
cell.ContextActions.Add (new MenuItem ());
Assert.That (cell.ContextActions [0].BindingContext, Is.SameAs (cell.BindingContext));
}
[Test]
public void RenderHeightINPCFromParent()
{
var lv = new ListView();
var cell = new TextCell();
cell.Parent = lv;
int changing = 0, changed = 0;
cell.PropertyChanging += (sender, args) => {
if (args.PropertyName == "RenderHeight")
changing++;
};
cell.PropertyChanged += (sender, args) => {
if (args.PropertyName == "RenderHeight")
changed++;
};
lv.RowHeight = 5;
Assume.That (cell.RenderHeight, Is.EqualTo (5));
Assert.That (changing, Is.EqualTo (1));
Assert.That (changed, Is.EqualTo (1));
}
[Test]
public async void ForceUpdateSizeCallsAreRateLimited()
{
var lv = new ListView { HasUnevenRows = true };
var cell = new ViewCell { Parent = lv };
int numberOfCalls = 0;
cell.ForceUpdateSizeRequested += (object sender, System.EventArgs e) => { numberOfCalls++; };
cell.ForceUpdateSize ();
cell.ForceUpdateSize ();
cell.ForceUpdateSize ();
cell.ForceUpdateSize ();
await System.Threading.Tasks.Task.Delay (TimeSpan.FromMilliseconds (150));
Assert.AreEqual (1, numberOfCalls);
}
[Test]
public async void ForceUpdateSizeWillNotBeCalledIfParentIsNotAListViewWithUnevenRows ()
{
var lv = new ListView { HasUnevenRows = false };
var cell = new ViewCell { Parent = lv };
int numberOfCalls = 0;
cell.ForceUpdateSizeRequested += (object sender, System.EventArgs e) => { numberOfCalls++; };
cell.ForceUpdateSize ();
await System.Threading.Tasks.Task.Delay (TimeSpan.FromMilliseconds (16));
Assert.AreEqual (0, numberOfCalls);
}
}
}