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using NUnit.Framework;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class TriggerTests : BaseTestFixture
{
class MockElement : VisualElement
{
}
[Test]
public void SettersAppliedOnConditionChanged ()
{
var conditionbp = BindableProperty.Create ("foo", typeof(string), typeof(BindableObject), null);
var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null);
var element = new MockElement ();
var trigger = new Trigger (typeof(VisualElement)) {
Property = conditionbp,
Value = "foobar",
Setters = {
new Setter { Property = setterbp, Value = "qux" },
}
};
element.SetValue (setterbp, "default");
element.Triggers.Add (trigger);
Assert.AreEqual ("default", element.GetValue (setterbp));
element.SetValue (conditionbp, "foobar");
Assert.AreEqual ("qux", element.GetValue (setterbp));
element.SetValue (conditionbp, "");
Assert.AreEqual ("default", element.GetValue (setterbp));
}
[Test]
public void SettersAppliedOnAttachIfConditionIsTrue ()
{
var conditionbp = BindableProperty.Create ("foo", typeof(string), typeof(BindableObject), null);
var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null);
var element = new MockElement ();
var trigger = new Trigger (typeof(VisualElement)) {
Property = conditionbp,
Value = "foobar",
Setters = {
new Setter { Property = setterbp, Value = "qux" },
}
};
element.SetValue (setterbp, "default");
element.SetValue (conditionbp, "foobar");
Assert.AreEqual ("default", element.GetValue (setterbp));
element.Triggers.Add (trigger);
Assert.AreEqual ("qux", element.GetValue (setterbp));
}
[Test]
public void SettersUnappliedOnDetach ()
{
var conditionbp = BindableProperty.Create ("foo", typeof(string), typeof(BindableObject), null);
var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null);
var element = new MockElement ();
var trigger = new Trigger (typeof(VisualElement)) {
Property = conditionbp,
Value = "foobar",
Setters = {
new Setter { Property = setterbp, Value = "qux" },
}
};
element.SetValue (setterbp, "default");
element.Triggers.Add (trigger);
Assert.AreEqual ("default", element.GetValue (setterbp));
element.SetValue (conditionbp, "foobar");
Assert.AreEqual ("qux", element.GetValue (setterbp));
element.Triggers.Remove (trigger);
Assert.AreEqual ("default", element.GetValue (setterbp));
}
[Test]
public void EnterAndExitActionsTriggered ()
{
var conditionbp = BindableProperty.Create ("foo", typeof(string), typeof(BindableObject), null);
var element = new MockElement ();
var enteraction = new MockTriggerAction ();
var exitaction = new MockTriggerAction ();
var trigger = new Trigger (typeof(VisualElement)) {
Property = conditionbp,
Value = "foobar",
EnterActions = {
enteraction
},
ExitActions = {
exitaction
}
};
Assert.False (enteraction.Invoked);
Assert.False (exitaction.Invoked);
element.Triggers.Add (trigger);
Assert.False (enteraction.Invoked);
Assert.False (exitaction.Invoked);
element.SetValue (conditionbp, "foobar");
Assert.True (enteraction.Invoked);
Assert.False (exitaction.Invoked);
enteraction.Invoked = exitaction.Invoked = false;
Assert.False (enteraction.Invoked);
Assert.False (exitaction.Invoked);
element.SetValue (conditionbp, "");
Assert.False (enteraction.Invoked);
Assert.True (exitaction.Invoked);
}
}
}
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