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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/models/list_model.h"
#include <stddef.h>
#include <memory>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ui {
class FooItem {
public:
explicit FooItem(int id) : id_(id) {}
int id() const { return id_; }
private:
int id_;
DISALLOW_COPY_AND_ASSIGN(FooItem);
};
class ListModelTest : public testing::Test,
public ListModelObserver {
public:
ListModelTest()
: added_count_(0),
removed_count_(0),
moved_count_(0),
changed_count_(0) {
}
void ExpectCountsEqual(size_t added_count,
size_t removed_count,
size_t moved_count,
size_t changed_count) {
EXPECT_EQ(added_count, added_count_);
EXPECT_EQ(removed_count, removed_count_);
EXPECT_EQ(moved_count, moved_count_);
EXPECT_EQ(changed_count, changed_count_);
}
void ClearCounts() {
added_count_ = removed_count_ = moved_count_ = changed_count_ = 0;
}
// ListModelObserver implementation:
void ListItemsAdded(size_t start, size_t count) override {
added_count_ += count;
}
void ListItemsRemoved(size_t start, size_t count) override {
removed_count_ += count;
}
void ListItemMoved(size_t index, size_t target_index) override {
++moved_count_;
}
void ListItemsChanged(size_t start, size_t count) override {
changed_count_ += count;
}
private:
size_t added_count_;
size_t removed_count_;
size_t moved_count_;
size_t changed_count_;
DISALLOW_COPY_AND_ASSIGN(ListModelTest);
};
TEST_F(ListModelTest, Add) {
ListModel<FooItem> model;
model.AddObserver(this);
// Append FooItem(0)
model.Add(std::make_unique<FooItem>(0));
ExpectCountsEqual(1, 0, 0, 0);
// Append FooItem(1)
model.Add(std::make_unique<FooItem>(1));
ExpectCountsEqual(2, 0, 0, 0);
// Insert FooItem(2) at position 0
model.AddAt(0, std::make_unique<FooItem>(2));
ExpectCountsEqual(3, 0, 0, 0);
// Total 3 items in model.
EXPECT_EQ(3U, model.item_count());
// First one should be FooItem(2), followed by FooItem(0) and FooItem(1)
EXPECT_EQ(2, model.GetItemAt(0)->id());
EXPECT_EQ(0, model.GetItemAt(1)->id());
EXPECT_EQ(1, model.GetItemAt(2)->id());
}
TEST_F(ListModelTest, Remove) {
ListModel<FooItem> model;
model.AddObserver(this);
model.Add(std::make_unique<FooItem>(0));
model.Add(std::make_unique<FooItem>(1));
model.Add(std::make_unique<FooItem>(2));
ClearCounts();
// Remove item at index 1 from model and release memory.
model.DeleteAt(1);
ExpectCountsEqual(0, 1, 0, 0);
EXPECT_EQ(2U, model.item_count());
EXPECT_EQ(0, model.GetItemAt(0)->id());
EXPECT_EQ(2, model.GetItemAt(1)->id());
// Remove all items from model and delete them.
model.DeleteAll();
ExpectCountsEqual(0, 3, 0, 0);
}
TEST_F(ListModelTest, DeleteAll) {
ListModel<FooItem> model;
model.AddObserver(this);
model.Add(std::make_unique<FooItem>(0));
model.Add(std::make_unique<FooItem>(1));
model.Add(std::make_unique<FooItem>(2));
ClearCounts();
// Delete all items.
model.DeleteAll();
ExpectCountsEqual(0, 3, 0, 0);
}
TEST_F(ListModelTest, Move) {
ListModel<FooItem> model;
model.AddObserver(this);
model.Add(std::make_unique<FooItem>(0));
model.Add(std::make_unique<FooItem>(1));
model.Add(std::make_unique<FooItem>(2));
ClearCounts();
// Moves item at index 0 to index 2.
model.Move(0, 2);
ExpectCountsEqual(0, 0, 1, 0);
EXPECT_EQ(1, model.GetItemAt(0)->id());
EXPECT_EQ(2, model.GetItemAt(1)->id());
EXPECT_EQ(0, model.GetItemAt(2)->id());
}
TEST_F(ListModelTest, FakeUpdate) {
ListModel<FooItem> model;
model.AddObserver(this);
model.Add(std::make_unique<FooItem>(0));
model.Add(std::make_unique<FooItem>(1));
model.Add(std::make_unique<FooItem>(2));
ClearCounts();
model.NotifyItemsChanged(0, 1);
ExpectCountsEqual(0, 0, 0, 1);
model.NotifyItemsChanged(1, 2);
ExpectCountsEqual(0, 0, 0, 3);
}
} // namespace ui
|
