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Diffstat (limited to 'Xamarin.Forms.Core.UnitTests/DataTriggerTests.cs')
| -rw-r--r-- | Xamarin.Forms.Core.UnitTests/DataTriggerTests.cs | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core.UnitTests/DataTriggerTests.cs b/Xamarin.Forms.Core.UnitTests/DataTriggerTests.cs new file mode 100644 index 00000000..585bebcf --- /dev/null +++ b/Xamarin.Forms.Core.UnitTests/DataTriggerTests.cs @@ -0,0 +1,146 @@ +using NUnit.Framework; +using System.Threading.Tasks; + +namespace Xamarin.Forms.Core.UnitTests +{ + [TestFixture] + public class DataTriggerTests : BaseTestFixture + { + class MockElement : VisualElement + { + } + + [Test] + public void SettersAppliedOnAttachIfConditionIsTrue () + { + var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null); + var element = new MockElement (); + var datatrigger = new DataTrigger (typeof(VisualElement)) { + Binding = new Binding ("foo"), + Value = "foobar", + Setters = { + new Setter { Property = setterbp, Value = "qux" }, + } + }; + + element.SetValue (setterbp, "default"); + element.BindingContext = new {foo = "foobar"}; + Assert.AreEqual ("default", element.GetValue (setterbp)); + element.Triggers.Add (datatrigger); + Assert.AreEqual ("qux", element.GetValue (setterbp)); + } + + [Test] + public void SettersUnappliedOnDetach () + { + var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null); + var element = new MockElement (); + var datatrigger = new DataTrigger (typeof(VisualElement)) { + Binding = new Binding ("foo"), + Value = "foobar", + Setters = { + new Setter { Property = setterbp, Value = "qux" }, + } + }; + + element.SetValue (setterbp, "default"); + element.Triggers.Add (datatrigger); + + Assert.AreEqual ("default", element.GetValue (setterbp)); + element.BindingContext = new {foo = "foobar"}; + Assert.AreEqual ("qux", element.GetValue (setterbp)); + element.Triggers.Remove (datatrigger); + Assert.AreEqual ("default", element.GetValue (setterbp)); + } + + [Test] + public void SettersAppliedOnConditionChanged () + { + var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null); + var element = new MockElement (); + var trigger = new DataTrigger (typeof (VisualElement)){ + Binding = new Binding ("foo"), + Value = "foobar", + Setters = { + new Setter { Property = setterbp, Value = "qux" }, + } + }; + + element.SetValue (setterbp, "default"); + element.Triggers.Add (trigger); + + Assert.AreEqual ("default", element.GetValue (setterbp)); + element.BindingContext = new {foo = "foobar"}; + Assert.AreEqual ("qux", element.GetValue (setterbp)); + element.BindingContext = new {foo = ""}; + Assert.AreEqual ("default", element.GetValue (setterbp)); + } + + [Test] + public void TriggersAppliedOnMultipleElements () + { + var setterbp = BindableProperty.Create ("bar", typeof(string), typeof(BindableObject), null); + var trigger = new DataTrigger (typeof(VisualElement)) { + Binding = new Binding ("foo"), + Value = "foobar", + Setters = { + new Setter { Property = setterbp, Value = "qux" }, + } + }; + var element0 = new MockElement { Triggers = { trigger } }; + var element1 = new MockElement { Triggers = { trigger } }; + + element0.BindingContext = element1.BindingContext = new {foo = "foobar"}; + Assert.AreEqual ("qux", element0.GetValue (setterbp)); + Assert.AreEqual ("qux", element1.GetValue (setterbp)); + } + + [Test] + //https://bugzilla.xamarin.com/show_bug.cgi?id=30074 + public void AllTriggersUnappliedBeforeApplying () + { + var boxview = new BoxView { + Triggers = { + new DataTrigger (typeof(BoxView)) { + Binding = new Binding ("."), + Value = "Complete", + Setters = { + new Setter { Property = BoxView.ColorProperty, Value = Color.Green }, + new Setter { Property = VisualElement.OpacityProperty, Value = .5 }, + } + }, + new DataTrigger (typeof(BoxView)) { + Binding = new Binding ("."), + Value = "MissingInfo", + Setters = { + new Setter { Property = BoxView.ColorProperty, Value = Color.Yellow }, + } + }, + new DataTrigger (typeof(BoxView)) { + Binding = new Binding ("."), + Value = "Error", + Setters = { + new Setter { Property = BoxView.ColorProperty, Value = Color.Red }, + } + }, + } + }; + + boxview.BindingContext = "Complete"; + Assert.AreEqual (Color.Green, boxview.Color); + Assert.AreEqual (.5, boxview.Opacity); + + boxview.BindingContext = "MissingInfo"; + Assert.AreEqual (Color.Yellow, boxview.Color); + Assert.AreEqual (1, boxview.Opacity); + + boxview.BindingContext = "Error"; + Assert.AreEqual (Color.Red, boxview.Color); + Assert.AreEqual (1, boxview.Opacity); + + boxview.BindingContext = "Complete"; + Assert.AreEqual (Color.Green, boxview.Color); + Assert.AreEqual (.5, boxview.Opacity); + } + } +}
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