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using System;
using NUnit.Framework;
using System.Collections.Generic;
using System.Linq;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class EffectTests : BaseTestFixture
{
[Test]
public void ResolveSetsId ()
{
string id = "Unknown";
var effect = Effect.Resolve (id);
Assert.AreEqual (id, effect.ResolveId);
}
[Test]
public void UnknownIdReturnsNullEffect ()
{
var effect = Effect.Resolve ("Foo");
Assert.IsInstanceOf<NullEffect> (effect);
}
[Test]
public void SendAttachedSetsFlag ()
{
var effect = Effect.Resolve ("Foo");
effect.SendAttached ();
Assert.True (effect.IsAttached);
}
[Test]
public void SendDetachedUnsetsFlag ()
{
var effect = Effect.Resolve ("Foo");
effect.SendAttached ();
effect.SendDetached ();
Assert.False (effect.IsAttached);
}
[Test]
public void EffectLifecyclePreProvider ()
{
var effect = new CustomEffect ();
var element = new Label ();
element.Effects.Add (effect);
((IVisualElementController)element).EffectControlProvider = new EffectControlProvider ();
Assert.True (effect.IsAttached);
Assert.True (effect.OnAttachedCalled);
Assert.True (effect.Registered);
Assert.False (effect.OnDetachedCalled);
element.Effects.Remove (effect);
Assert.True (effect.OnDetachedCalled);
}
[Test]
public void EffectLifecyclePostProvider ()
{
var effect = new CustomEffect ();
var element = new Label ();
((IVisualElementController)element).EffectControlProvider = new EffectControlProvider ();
element.Effects.Add (effect);
Assert.True (effect.IsAttached);
Assert.True (effect.OnAttachedCalled);
Assert.True (effect.Registered);
Assert.False (effect.OnDetachedCalled);
element.Effects.Remove (effect);
Assert.True (effect.OnDetachedCalled);
}
[Test]
public void EffectsClearDetachesEffect ()
{
var effect = new CustomEffect ();
var element = new Label ();
((IVisualElementController)element).EffectControlProvider = new EffectControlProvider ();
element.Effects.Add (effect);
element.Effects.Clear ();
Assert.True (effect.OnDetachedCalled);
}
class EffectControlProvider : IEffectControlProvider
{
public void RegisterEffect (Effect effect)
{
var e = effect as CustomEffect;
if (e != null)
e.Registered = true;
}
}
class CustomEffect : Effect
{
public bool OnAttachedCalled;
public bool OnDetachedCalled;
public bool Registered;
protected override void OnAttached ()
{
OnAttachedCalled = true;
}
protected override void OnDetached ()
{
OnDetachedCalled = true;
}
}
}
}
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