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using System;
using System.Collections.Generic;
using NUnit.Framework;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class DataTemplateTests : BaseTestFixture
{
[Test]
public void CtorInvalid()
{
Assert.Throws<ArgumentNullException> (() => new DataTemplate ((Func<object>)null),
"Allowed null creator delegate");
Assert.Throws<ArgumentNullException> (() => new DataTemplate ((Type)null),
"Allowed null type");
}
[Test]
public void CreateContent()
{
var template = new DataTemplate (() => new MockBindable());
object obj = template.CreateContent();
Assert.IsNotNull (obj);
Assert.That (obj, Is.InstanceOf<MockBindable>());
}
[Test]
public void CreateContentType()
{
var template = new DataTemplate (typeof (MockBindable));
object obj = template.CreateContent();
Assert.IsNotNull (obj);
Assert.That (obj, Is.InstanceOf<MockBindable>());
}
[Test]
public void CreateContentValues()
{
var template = new DataTemplate (typeof (MockBindable)) {
Values = { { MockBindable.TextProperty, "value" } }
};
MockBindable bindable = (MockBindable)template.CreateContent();
Assert.That (bindable.GetValue (MockBindable.TextProperty), Is.EqualTo ("value"));
}
[Test]
public void CreateContentBindings()
{
var template = new DataTemplate (() => new MockBindable()) {
Bindings = { { MockBindable.TextProperty, new Binding (".") } }
};
MockBindable bindable = (MockBindable)template.CreateContent();
bindable.BindingContext = "text";
Assert.That (bindable.GetValue (MockBindable.TextProperty), Is.EqualTo ("text"));
}
[Test]
public void SetBindingInvalid()
{
var template = new DataTemplate (typeof (MockBindable));
Assert.That (() => template.SetBinding (null, new Binding (".")), Throws.InstanceOf<ArgumentNullException>());
Assert.That (() => template.SetBinding (MockBindable.TextProperty, null), Throws.InstanceOf<ArgumentNullException>());
}
[Test]
public void SetBindingOverridesValue()
{
var template = new DataTemplate (typeof (MockBindable));
template.SetValue (MockBindable.TextProperty, "value");
template.SetBinding (MockBindable.TextProperty, new Binding ("."));
MockBindable bindable = (MockBindable) template.CreateContent();
Assume.That (bindable.GetValue (MockBindable.TextProperty), Is.EqualTo (bindable.BindingContext));
bindable.BindingContext = "binding";
Assert.That (bindable.GetValue (MockBindable.TextProperty), Is.EqualTo ("binding"));
}
[Test]
public void SetValueOverridesBinding()
{
var template = new DataTemplate (typeof (MockBindable));
template.SetBinding (MockBindable.TextProperty, new Binding ("."));
template.SetValue (MockBindable.TextProperty, "value");
MockBindable bindable = (MockBindable) template.CreateContent();
Assert.That (bindable.GetValue (MockBindable.TextProperty), Is.EqualTo ("value"));
bindable.BindingContext = "binding";
Assert.That (bindable.GetValue (MockBindable.TextProperty), Is.EqualTo ("value"));
}
[Test]
public void SetValueInvalid()
{
var template = new DataTemplate (typeof (MockBindable));
Assert.That (() => template.SetValue (null, "string"), Throws.InstanceOf<ArgumentNullException>());
}
[Test]
public void SetValueAndBinding ()
{
var template = new DataTemplate (typeof (TextCell)) {
Bindings = {
{TextCell.TextProperty, new Binding ("Text")}
},
Values = {
{TextCell.TextProperty, "Text"}
}
};
Assert.That (() => template.CreateContent (), Throws.InstanceOf<InvalidOperationException> ());
}
}
}
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