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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Moq;
using NUnit.Framework;
using Xamarin.PropertyEditing.ViewModels;
namespace Xamarin.PropertyEditing.Tests
{
[TestFixture]
internal class EventViewModelTests
{
[Test]
public void MethodName()
{
const string name = "name";
var info = new Mock<IEventInfo> ();
info.SetupGet (i => i.Name).Returns (name);
var editor = new MockObjectEditor {
Events = new[] { info.Object }
};
const string handler = "handler";
editor.AttachHandlerAsync (info.Object, handler);
var ev = new EventViewModel (MockEditorProvider.MockPlatform, info.Object, new[] { editor });
Assert.That (ev.MethodName, Is.EqualTo (handler));
}
[Test]
public void SetMethodName()
{
const string name = "name";
var info = new Mock<IEventInfo> ();
info.SetupGet (i => i.Name).Returns (name);
var editor = new Mock<IObjectEditor> ();
var eeditor = editor.As<IObjectEventEditor> ();
eeditor.SetupGet (e => e.Events).Returns (new[] { info.Object });
var vm = new EventViewModel (MockEditorProvider.MockPlatform, info.Object, new[] { editor.Object });
Assume.That (vm.MethodName, Is.Null);
bool changed = false;
vm.PropertyChanged += (o, e) => {
if (e.PropertyName == nameof (EventViewModel.MethodName))
changed = true;
};
const string newMethodName = "foo";
vm.MethodName = newMethodName;
Assert.That (changed, Is.True);
eeditor.Verify (i => i.AttachHandlerAsync (info.Object, newMethodName));
}
[Test]
public void ChangeMethodName ()
{
const string name = "name";
var info = new Mock<IEventInfo> ();
info.SetupGet (i => i.Name).Returns (name);
const string oldHandler = "oldHandler";
var editor = new Mock<IObjectEditor> ();
var eeditor = editor.As<IObjectEventEditor> ();
eeditor.SetupGet (e => e.Events).Returns (new[] { info.Object });
eeditor.Setup (e => e.GetHandlersAsync (info.Object)).ReturnsAsync (new[] { oldHandler });
var vm = new EventViewModel (MockEditorProvider.MockPlatform, info.Object, new[] { editor.Object });
Assume.That (vm.MethodName, Is.EqualTo (oldHandler));
bool changed = false;
vm.PropertyChanged += (o, e) => {
if (e.PropertyName == nameof (EventViewModel.MethodName))
changed = true;
};
const string newMethodName = "foo";
vm.MethodName = newMethodName;
Assert.That (changed, Is.True);
eeditor.Verify (i => i.DetachHandlerAsync (info.Object, oldHandler));
eeditor.Verify (i => i.AttachHandlerAsync (info.Object, newMethodName));
}
[Test]
public void DisagreeingValues()
{
const string name = "name";
var info = new Mock<IEventInfo> ();
info.SetupGet (i => i.Name).Returns (name);
var editor = new MockObjectEditor {
Events = new[] { info.Object }
};
const string handler = "handler";
editor.AttachHandlerAsync (info.Object, handler);
var editor2 = new MockObjectEditor {
Events = new[] { info.Object }
};
editor.AttachHandlerAsync (info.Object, "handler2");
var ev = new EventViewModel (MockEditorProvider.MockPlatform, info.Object, new[] { editor, editor2 });
Assert.That (ev.MethodName, Is.Null);
Assert.That (ev.MultipleValues, Is.True);
}
}
}
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