1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using NUnit.Framework;
using Xamarin.Forms.Internals;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class NotifyCollectionChangedEventArgsExtensionsTests : BaseTestFixture
{
[Test]
public void Add()
{
List<string> applied = new List<string> { "foo", "bar", "baz" };
Action reset = () => Assert.Fail ("Reset should not be called");
Action<object, int, bool> insert = (o, i, create) => {
Assert.That (create, Is.True);
applied.Insert (i, (string) o);
};
Action<object, int> removeAt = (o, i) => applied.RemoveAt (i);
var items = new ObservableCollection<string> (applied);
items.CollectionChanged += (s, e) => e.Apply (insert, removeAt, reset);
items.Add ("monkey");
CollectionAssert.AreEqual (items, applied);
}
[Test]
public void Insert()
{
List<string> applied = new List<string> { "foo", "bar", "baz" };
Action reset = () => Assert.Fail ("Reset should not be called");
Action<object, int, bool> insert = (o, i, create) => {
Assert.That (create, Is.True);
applied.Insert (i, (string) o);
};
Action<object, int> removeAt = (o, i) => applied.RemoveAt (i);
var items = new ObservableCollection<string> (applied);
items.CollectionChanged += (s, e) => e.Apply (insert, removeAt, reset);
items.Insert (1, "monkey");
CollectionAssert.AreEqual (items, applied);
}
[Test]
public void Move()
{
List<string> applied = new List<string> { "foo", "bar", "baz" };
Action reset = () => Assert.Fail ("Reset should not be called");
Action<object, int, bool> insert = (o, i, create) => {
Assert.That (create, Is.False);
applied.Insert (i, (string) o);
};
Action<object, int> removeAt = (o, i) => applied.RemoveAt (i);
var items = new ObservableCollection<string> (applied);
items.CollectionChanged += (s, e) => e.Apply (insert, removeAt, reset);
items.Move (0, 2);
CollectionAssert.AreEqual (items, applied);
}
}
}
|