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