-
Notifications
You must be signed in to change notification settings - Fork 1.6k
/
DataTemplateSelectorTests.cs
158 lines (130 loc) · 3.44 KB
/
DataTemplateSelectorTests.cs
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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
using System;
using NUnit.Framework;
using Xamarin.Forms;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class DataTemplateSelectorTests : BaseTestFixture
{
[TearDown]
public override void TearDown()
{
base.TearDown();
Device.PlatformServices = null;
}
[SetUp]
public override void Setup()
{
base.Setup();
Device.PlatformServices = new MockPlatformServices();
}
class TemplateOne : DataTemplate
{
public TemplateOne () : base (typeof (ViewCell))
{
}
}
class TemplateTwo : DataTemplate
{
public TemplateTwo () : base (typeof (EntryCell))
{
}
}
class TestDTS : DataTemplateSelector
{
public TestDTS ()
{
templateOne = new TemplateOne ();
templateTwo = new TemplateTwo ();
}
protected override DataTemplate OnSelectTemplate (object item, BindableObject container)
{
if (item is double)
return templateOne;
if (item is byte)
return new TestDTS ();
return templateTwo;
}
readonly DataTemplate templateOne;
readonly DataTemplate templateTwo;
}
[Test]
public void Constructor ()
{
var dts = new TestDTS ();
}
[Test]
public void ReturnsCorrectType ()
{
var dts = new TestDTS ();
Assert.IsInstanceOf<TemplateOne> (dts.SelectTemplate (1d, null));
Assert.IsInstanceOf<TemplateTwo> (dts.SelectTemplate ("test", null));
}
[Test]
public void ListViewSupport ()
{
var listView = new ListView(ListViewCachingStrategy.RecycleElement);
listView.ItemsSource = new object[] { 0d, "test" };
listView.ItemTemplate = new TestDTS ();
Assert.IsInstanceOf<ViewCell> (listView.TemplatedItems[0]);
Assert.IsInstanceOf<EntryCell> (listView.TemplatedItems[1]);
}
[Test]
public void NestingThrowsException ()
{
var dts = new TestDTS ();
Assert.Throws<NotSupportedException> (() => dts.SelectTemplate ((byte)0, null));
}
}
[TestFixture]
public class DataTemplateRecycleTests : BaseTestFixture
{
[TearDown]
public override void TearDown()
{
base.TearDown();
Device.PlatformServices = null;
}
[SetUp]
public override void Setup()
{
base.Setup();
Device.PlatformServices = new MockPlatformServices();
}
class TestDataTemplateSelector : DataTemplateSelector
{
readonly DataTemplate declarativeTemplate;
readonly DataTemplate proceduralTemplate;
public TestDataTemplateSelector ()
{
declarativeTemplate = new DataTemplate(typeof(ViewCell));
proceduralTemplate = new DataTemplate(() => new EntryCell());
}
protected override DataTemplate OnSelectTemplate(object item, BindableObject container)
{
Counter++;
if (item is string)
return declarativeTemplate;
return proceduralTemplate;
}
public int Counter = 0;
}
[Test]
public void ListViewSupport ()
{
var listView = new ListView(ListViewCachingStrategy.RecycleElementAndDataTemplate);
listView.ItemsSource = new object[] { "foo", "bar", 0 };
Assert.That(listView.CachingStrategy ==
ListViewCachingStrategy.RecycleElementAndDataTemplate);
var selector = new TestDataTemplateSelector();
listView.ItemTemplate = selector;
Assert.That(selector.Counter == 0);
Assert.IsInstanceOf<ViewCell>(listView.TemplatedItems[0]);
Assert.That(selector.Counter == 1);
Assert.IsInstanceOf<ViewCell>(listView.TemplatedItems[1]);
Assert.That(selector.Counter == 1);
Assert.Throws<NotSupportedException>(
() => { var o = listView.TemplatedItems[2]; });
}
}
}