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accessibility_bridge_unittests.cc
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "accessibility_bridge.h"
6
7 #include "gmock/gmock.h"
8 #include "gtest/gtest.h"
9
10 #include "flutter/third_party/accessibility/ax/ax_tree_manager_map.h"
11 #include "test_accessibility_bridge.h"
12
13 namespace flutter {
14 namespace testing {
15
16 using ::testing::Contains;
17
18 FlutterSemanticsFlags kEmptyFlags = FlutterSemanticsFlags{};
19
20 FlutterSemanticsNode2 CreateSemanticsNode(
21 int32_t id,
22 const char* label,
23 const std::vector<int32_t>* children = nullptr) {
24 return {
25 .id = id,
26 // NOLINTNEXTLINE(clang-analyzer-optin.core.EnumCastOutOfRange)
27 .flags__deprecated__ = static_cast<FlutterSemanticsFlag>(0),
28 // NOLINTNEXTLINE(clang-analyzer-optin.core.EnumCastOutOfRange)
29 .actions = static_cast<FlutterSemanticsAction>(0),
30 .text_selection_base = -1,
31 .text_selection_extent = -1,
32 .label = label,
33 .hint = "",
34 .value = "",
35 .increased_value = "",
36 .decreased_value = "",
37 .child_count = children ? children->size() : 0,
38 .children_in_traversal_order = children ? children->data() : nullptr,
39 .custom_accessibility_actions_count = 0,
40 .tooltip = "",
41 .flags2 = &kEmptyFlags,
42 };
43 }
44
45 TEST(AccessibilityBridgeTest, BasicTest) {
46 std::shared_ptr<TestAccessibilityBridge> bridge =
47 std::make_shared<TestAccessibilityBridge>();
48
49 std::vector<int32_t> children{1, 2};
50 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root", &children);
51 FlutterSemanticsNode2 child1 = CreateSemanticsNode(1, "child 1");
52 FlutterSemanticsNode2 child2 = CreateSemanticsNode(2, "child 2");
53
54 bridge->AddFlutterSemanticsNodeUpdate(root);
55 bridge->AddFlutterSemanticsNodeUpdate(child1);
56 bridge->AddFlutterSemanticsNodeUpdate(child2);
57 bridge->CommitUpdates();
58
59 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
60 auto child1_node = bridge->GetFlutterPlatformNodeDelegateFromID(1).lock();
61 auto child2_node = bridge->GetFlutterPlatformNodeDelegateFromID(2).lock();
62 EXPECT_EQ(root_node->GetChildCount(), 2);
63 EXPECT_EQ(root_node->GetData().child_ids[0], 1);
64 EXPECT_EQ(root_node->GetData().child_ids[1], 2);
65 EXPECT_EQ(root_node->GetName(), "root");
66
67 EXPECT_EQ(child1_node->GetChildCount(), 0);
68 EXPECT_EQ(child1_node->GetName(), "child 1");
69
70 EXPECT_EQ(child2_node->GetChildCount(), 0);
71 EXPECT_EQ(child2_node->GetName(), "child 2");
72 }
73
74 // Flutter used to assume that the accessibility root had ID 0.
75 // In a multi-view world, each view has its own accessibility root
76 // with a globally unique node ID.
77 TEST(AccessibilityBridgeTest, AccessibilityRootId) {
78 std::shared_ptr<TestAccessibilityBridge> bridge =
79 std::make_shared<TestAccessibilityBridge>();
80
81 std::vector<int32_t> children{456, 789};
82 FlutterSemanticsNode2 root = CreateSemanticsNode(123, "root", &children);
83 FlutterSemanticsNode2 child1 = CreateSemanticsNode(456, "child 1");
84 FlutterSemanticsNode2 child2 = CreateSemanticsNode(789, "child 2");
85
86 bridge->AddFlutterSemanticsNodeUpdate(root);
87 bridge->AddFlutterSemanticsNodeUpdate(child1);
88 bridge->AddFlutterSemanticsNodeUpdate(child2);
89 bridge->CommitUpdates();
90
91 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(123).lock();
92 auto child1_node = bridge->GetFlutterPlatformNodeDelegateFromID(456).lock();
93 auto child2_node = bridge->GetFlutterPlatformNodeDelegateFromID(789).lock();
94 auto fake_delegate = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
95
96 EXPECT_EQ(bridge->GetRootAsAXNode()->id(), 123);
97 EXPECT_EQ(bridge->RootDelegate()->GetName(), "root");
98
99 EXPECT_EQ(root_node->GetChildCount(), 2);
100 EXPECT_EQ(root_node->GetData().child_ids[0], 456);
101 EXPECT_EQ(root_node->GetData().child_ids[1], 789);
102 EXPECT_EQ(root_node->GetName(), "root");
103
104 EXPECT_EQ(child1_node->GetChildCount(), 0);
105 EXPECT_EQ(child1_node->GetName(), "child 1");
106
107 EXPECT_EQ(child2_node->GetChildCount(), 0);
108 EXPECT_EQ(child2_node->GetName(), "child 2");
109
110 ASSERT_FALSE(fake_delegate);
111 }
112
113 // Semantic nodes can be added in any order.
114 TEST(AccessibilityBridgeTest, AddOrder) {
115 std::shared_ptr<TestAccessibilityBridge> bridge =
116 std::make_shared<TestAccessibilityBridge>();
117
118 std::vector<int32_t> root_children{34, 56};
119 std::vector<int32_t> child2_children{78};
120 std::vector<int32_t> child3_children{90};
121 FlutterSemanticsNode2 root = CreateSemanticsNode(12, "root", &root_children);
122 FlutterSemanticsNode2 child1 = CreateSemanticsNode(34, "child 1");
123 FlutterSemanticsNode2 child2 =
124 CreateSemanticsNode(56, "child 2", &child2_children);
125 FlutterSemanticsNode2 child3 =
126 CreateSemanticsNode(78, "child 3", &child3_children);
127 FlutterSemanticsNode2 child4 = CreateSemanticsNode(90, "child 4");
128
129 bridge->AddFlutterSemanticsNodeUpdate(child3);
130 bridge->AddFlutterSemanticsNodeUpdate(child2);
131 bridge->AddFlutterSemanticsNodeUpdate(root);
132 bridge->AddFlutterSemanticsNodeUpdate(child1);
133 bridge->AddFlutterSemanticsNodeUpdate(child4);
134 bridge->CommitUpdates();
135
136 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(12).lock();
137 auto child1_node = bridge->GetFlutterPlatformNodeDelegateFromID(34).lock();
138 auto child2_node = bridge->GetFlutterPlatformNodeDelegateFromID(56).lock();
139 auto child3_node = bridge->GetFlutterPlatformNodeDelegateFromID(78).lock();
140 auto child4_node = bridge->GetFlutterPlatformNodeDelegateFromID(90).lock();
141
142 EXPECT_EQ(bridge->GetRootAsAXNode()->id(), 12);
143 EXPECT_EQ(bridge->RootDelegate()->GetName(), "root");
144
145 EXPECT_EQ(root_node->GetChildCount(), 2);
146 EXPECT_EQ(root_node->GetData().child_ids[0], 34);
147 EXPECT_EQ(root_node->GetData().child_ids[1], 56);
148 EXPECT_EQ(root_node->GetName(), "root");
149
150 EXPECT_EQ(child1_node->GetChildCount(), 0);
151 EXPECT_EQ(child1_node->GetName(), "child 1");
152
153 EXPECT_EQ(child2_node->GetChildCount(), 1);
154 EXPECT_EQ(child2_node->GetData().child_ids[0], 78);
155 EXPECT_EQ(child2_node->GetName(), "child 2");
156
157 EXPECT_EQ(child3_node->GetChildCount(), 1);
158 EXPECT_EQ(child3_node->GetData().child_ids[0], 90);
159 EXPECT_EQ(child3_node->GetName(), "child 3");
160
161 EXPECT_EQ(child4_node->GetChildCount(), 0);
162 EXPECT_EQ(child4_node->GetName(), "child 4");
163 }
164
165 TEST(AccessibilityBridgeTest, CanFireChildrenChangedCorrectly) {
166 std::shared_ptr<TestAccessibilityBridge> bridge =
167 std::make_shared<TestAccessibilityBridge>();
168
169 std::vector<int32_t> children{1};
170 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root", &children);
171 FlutterSemanticsNode2 child1 = CreateSemanticsNode(1, "child 1");
172
173 bridge->AddFlutterSemanticsNodeUpdate(root);
174 bridge->AddFlutterSemanticsNodeUpdate(child1);
175
176 bridge->CommitUpdates();
177
178 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
179 auto child1_node = bridge->GetFlutterPlatformNodeDelegateFromID(1).lock();
180 EXPECT_EQ(root_node->GetChildCount(), 1);
181 EXPECT_EQ(root_node->GetData().child_ids[0], 1);
182 EXPECT_EQ(root_node->GetName(), "root");
183
184 EXPECT_EQ(child1_node->GetChildCount(), 0);
185 EXPECT_EQ(child1_node->GetName(), "child 1");
186 bridge->accessibility_events.clear();
187
188 // Add a child to root.
189 root.child_count = 2;
190 int32_t new_children[] = {1, 2};
191 root.children_in_traversal_order = new_children;
192
193 FlutterSemanticsNode2 child2 = CreateSemanticsNode(2, "child 2");
194
195 bridge->AddFlutterSemanticsNodeUpdate(root);
196 bridge->AddFlutterSemanticsNodeUpdate(child2);
197 bridge->CommitUpdates();
198
199 root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
200
201 EXPECT_EQ(root_node->GetChildCount(), 2);
202 EXPECT_EQ(root_node->GetData().child_ids[0], 1);
203 EXPECT_EQ(root_node->GetData().child_ids[1], 2);
204 EXPECT_EQ(bridge->accessibility_events.size(), size_t{2});
205 std::set<ui::AXEventGenerator::Event> actual_event{
206 bridge->accessibility_events.begin(), bridge->accessibility_events.end()};
207 EXPECT_THAT(actual_event,
208 Contains(ui::AXEventGenerator::Event::CHILDREN_CHANGED));
209 EXPECT_THAT(actual_event,
210 Contains(ui::AXEventGenerator::Event::SUBTREE_CREATED));
211 }
212
213 TEST(AccessibilityBridgeTest, CanHandleSelectionChangeCorrectly) {
214 std::shared_ptr<TestAccessibilityBridge> bridge =
215 std::make_shared<TestAccessibilityBridge>();
216 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root");
217 auto flags = FlutterSemanticsFlags{
218 .is_focused = FlutterTristate::kFlutterTristateTrue,
219 .is_text_field = true,
220 };
221 root.flags2 = &flags;
222
223 bridge->AddFlutterSemanticsNodeUpdate(root);
224 bridge->CommitUpdates();
225
226 const ui::AXTreeData& tree = bridge->GetAXTreeData();
227 EXPECT_EQ(tree.sel_anchor_object_id, ui::AXNode::kInvalidAXID);
228 bridge->accessibility_events.clear();
229
230 // Update the selection.
231 root.text_selection_base = 0;
232 root.text_selection_extent = 5;
233 bridge->AddFlutterSemanticsNodeUpdate(root);
234
235 bridge->CommitUpdates();
236
237 EXPECT_EQ(tree.sel_anchor_object_id, 0);
238 EXPECT_EQ(tree.sel_anchor_offset, 0);
239 EXPECT_EQ(tree.sel_focus_object_id, 0);
240 EXPECT_EQ(tree.sel_focus_offset, 5);
241 ASSERT_EQ(bridge->accessibility_events.size(), size_t{2});
242 EXPECT_EQ(bridge->accessibility_events[0],
243 ui::AXEventGenerator::Event::DOCUMENT_SELECTION_CHANGED);
244 EXPECT_EQ(bridge->accessibility_events[1],
245 ui::AXEventGenerator::Event::OTHER_ATTRIBUTE_CHANGED);
246 }
247
248 TEST(AccessibilityBridgeTest, DoesNotAssignEditableRootToSelectableText) {
249 std::shared_ptr<TestAccessibilityBridge> bridge =
250 std::make_shared<TestAccessibilityBridge>();
251 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root");
252 auto flags = FlutterSemanticsFlags{
253 .is_text_field = true,
254 .is_read_only = true,
255 };
256 root.flags2 = &flags;
257
258 bridge->AddFlutterSemanticsNodeUpdate(root);
259 bridge->CommitUpdates();
260
261 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
262
263 EXPECT_FALSE(root_node->GetData().GetBoolAttribute(
264 ax::mojom::BoolAttribute::kEditableRoot));
265 }
266
267 TEST(AccessibilityBridgeTest, SwitchHasSwitchRole) {
268 std::shared_ptr<TestAccessibilityBridge> bridge =
269 std::make_shared<TestAccessibilityBridge>();
270 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root");
271 auto flags = FlutterSemanticsFlags{
272 .is_enabled = FlutterTristate::kFlutterTristateTrue,
273 .is_toggled = FlutterTristate::kFlutterTristateFalse,
274 };
275
276 root.flags2 = &flags;
277 bridge->AddFlutterSemanticsNodeUpdate(root);
278 bridge->CommitUpdates();
279
280 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
281 EXPECT_EQ(root_node->GetData().role, ax::mojom::Role::kSwitch);
282 }
283
284 TEST(AccessibilityBridgeTest, SliderHasSliderRole) {
285 std::shared_ptr<TestAccessibilityBridge> bridge =
286 std::make_shared<TestAccessibilityBridge>();
287 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root");
288 auto flags = FlutterSemanticsFlags{
289 .is_enabled = FlutterTristate::kFlutterTristateTrue,
290 .is_focused = FlutterTristate::kFlutterTristateFalse,
291 .is_slider = true,
292 };
293
294 root.flags2 = &flags;
295
296 bridge->AddFlutterSemanticsNodeUpdate(root);
297 bridge->CommitUpdates();
298
299 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
300 EXPECT_EQ(root_node->GetData().role, ax::mojom::Role::kSlider);
301 }
302
303 // Ensure that checkboxes have their checked status set apropriately
304 // Previously, only Radios could have this flag updated
305 // Resulted in the issue seen at
306 // https://github.com/flutter/flutter/issues/96218
307 // As this fix involved code run on all platforms, it is included here.
308 TEST(AccessibilityBridgeTest, CanSetCheckboxChecked) {
309 std::shared_ptr<TestAccessibilityBridge> bridge =
310 std::make_shared<TestAccessibilityBridge>();
311 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root");
312 auto flags = FlutterSemanticsFlags{
313 .is_checked = FlutterCheckState::kFlutterCheckStateTrue,
314 };
315
316 root.flags2 = &flags;
317 bridge->AddFlutterSemanticsNodeUpdate(root);
318 bridge->CommitUpdates();
319
320 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
321 EXPECT_EQ(root_node->GetData().role, ax::mojom::Role::kCheckBox);
322 EXPECT_EQ(root_node->GetData().GetCheckedState(),
323 ax::mojom::CheckedState::kTrue);
324 }
325
326 // Verify that a node can be moved from one parent to another.
327 TEST(AccessibilityBridgeTest, CanReparentNode) {
328 std::shared_ptr<TestAccessibilityBridge> bridge =
329 std::make_shared<TestAccessibilityBridge>();
330
331 std::vector<int32_t> root_children{1};
332 std::vector<int32_t> child1_children{2};
333 FlutterSemanticsNode2 root = CreateSemanticsNode(0, "root", &root_children);
334 FlutterSemanticsNode2 child1 =
335 CreateSemanticsNode(1, "child 1", &child1_children);
336 FlutterSemanticsNode2 child2 = CreateSemanticsNode(2, "child 2");
337
338 bridge->AddFlutterSemanticsNodeUpdate(root);
339 bridge->AddFlutterSemanticsNodeUpdate(child1);
340 bridge->AddFlutterSemanticsNodeUpdate(child2);
341 bridge->CommitUpdates();
342 bridge->accessibility_events.clear();
343
344 // Reparent child2 from child1 to the root.
345 child1.child_count = 0;
346 child1.children_in_traversal_order = nullptr;
347
348 int32_t new_root_children[] = {1, 2};
349 root.child_count = 2;
350 root.children_in_traversal_order = new_root_children;
351
352 bridge->AddFlutterSemanticsNodeUpdate(root);
353 bridge->AddFlutterSemanticsNodeUpdate(child1);
354 bridge->AddFlutterSemanticsNodeUpdate(child2);
355 bridge->CommitUpdates();
356
357 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
358 auto child1_node = bridge->GetFlutterPlatformNodeDelegateFromID(1).lock();
359 auto child2_node = bridge->GetFlutterPlatformNodeDelegateFromID(2).lock();
360
361 EXPECT_EQ(root_node->GetChildCount(), 2);
362 EXPECT_EQ(root_node->GetData().child_ids[0], 1);
363 EXPECT_EQ(root_node->GetData().child_ids[1], 2);
364 EXPECT_EQ(root_node->GetName(), "root");
365
366 EXPECT_EQ(child1_node->GetChildCount(), 0);
367 EXPECT_EQ(child1_node->GetName(), "child 1");
368
369 EXPECT_EQ(child2_node->GetChildCount(), 0);
370 EXPECT_EQ(child2_node->GetName(), "child 2");
371
372 ASSERT_EQ(bridge->accessibility_events.size(), size_t{5});
373
374 // Child2 is moved from child1 to root.
375 EXPECT_THAT(bridge->accessibility_events,
376 Contains(ui::AXEventGenerator::Event::CHILDREN_CHANGED).Times(2));
377 EXPECT_THAT(bridge->accessibility_events,
378 Contains(ui::AXEventGenerator::Event::SUBTREE_CREATED).Times(1));
379
380 // Child1 is no longer a parent. It loses its group role and disables its
381 // 'clip children' attribute.
382 EXPECT_THAT(
383 bridge->accessibility_events,
384 Contains(ui::AXEventGenerator::Event::OTHER_ATTRIBUTE_CHANGED).Times(1));
385 EXPECT_THAT(bridge->accessibility_events,
386 Contains(ui::AXEventGenerator::Event::ROLE_CHANGED).Times(1));
387 }
388
389 // Verify that multiple nodes can be moved to new parents.
390 TEST(AccessibilityBridgeTest, CanReparentMultipleNodes) {
391 std::shared_ptr<TestAccessibilityBridge> bridge =
392 std::make_shared<TestAccessibilityBridge>();
393
394 int32_t root_id = 0;
395 int32_t intermediary1_id = 1;
396 int32_t intermediary2_id = 2;
397 int32_t leaf1_id = 3;
398 int32_t leaf2_id = 4;
399 int32_t leaf3_id = 5;
400
401 std::vector<int32_t> root_children{intermediary1_id, intermediary2_id};
402 std::vector<int32_t> intermediary1_children{leaf1_id};
403 std::vector<int32_t> intermediary2_children{leaf2_id, leaf3_id};
404 FlutterSemanticsNode2 root =
405 CreateSemanticsNode(root_id, "root", &root_children);
406 FlutterSemanticsNode2 intermediary1 = CreateSemanticsNode(
407 intermediary1_id, "intermediary 1", &intermediary1_children);
408 FlutterSemanticsNode2 intermediary2 = CreateSemanticsNode(
409 intermediary2_id, "intermediary 2", &intermediary2_children);
410 FlutterSemanticsNode2 leaf1 = CreateSemanticsNode(leaf1_id, "leaf 1");
411 FlutterSemanticsNode2 leaf2 = CreateSemanticsNode(leaf2_id, "leaf 2");
412 FlutterSemanticsNode2 leaf3 = CreateSemanticsNode(leaf3_id, "leaf 3");
413
414 bridge->AddFlutterSemanticsNodeUpdate(root);
415 bridge->AddFlutterSemanticsNodeUpdate(intermediary1);
416 bridge->AddFlutterSemanticsNodeUpdate(intermediary2);
417 bridge->AddFlutterSemanticsNodeUpdate(leaf1);
418 bridge->AddFlutterSemanticsNodeUpdate(leaf2);
419 bridge->AddFlutterSemanticsNodeUpdate(leaf3);
420 bridge->CommitUpdates();
421 bridge->accessibility_events.clear();
422
423 // Swap intermediary 1's and intermediary2's children.
424 int32_t new_intermediary1_children[] = {leaf2_id, leaf3_id};
425 intermediary1.child_count = 2;
426 intermediary1.children_in_traversal_order = new_intermediary1_children;
427
428 int32_t new_intermediary2_children[] = {leaf1_id};
429 intermediary2.child_count = 1;
430 intermediary2.children_in_traversal_order = new_intermediary2_children;
431
432 bridge->AddFlutterSemanticsNodeUpdate(intermediary1);
433 bridge->AddFlutterSemanticsNodeUpdate(intermediary2);
434 bridge->AddFlutterSemanticsNodeUpdate(leaf1);
435 bridge->AddFlutterSemanticsNodeUpdate(leaf2);
436 bridge->AddFlutterSemanticsNodeUpdate(leaf3);
437 bridge->CommitUpdates();
438
439 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(root_id).lock();
440 auto intermediary1_node =
441 bridge->GetFlutterPlatformNodeDelegateFromID(intermediary1_id).lock();
442 auto intermediary2_node =
443 bridge->GetFlutterPlatformNodeDelegateFromID(intermediary2_id).lock();
444 auto leaf1_node =
445 bridge->GetFlutterPlatformNodeDelegateFromID(leaf1_id).lock();
446 auto leaf2_node =
447 bridge->GetFlutterPlatformNodeDelegateFromID(leaf2_id).lock();
448 auto leaf3_node =
449 bridge->GetFlutterPlatformNodeDelegateFromID(leaf3_id).lock();
450
451 EXPECT_EQ(root_node->GetChildCount(), 2);
452 EXPECT_EQ(root_node->GetData().child_ids[0], intermediary1_id);
453 EXPECT_EQ(root_node->GetData().child_ids[1], intermediary2_id);
454 EXPECT_EQ(root_node->GetName(), "root");
455
456 EXPECT_EQ(intermediary1_node->GetChildCount(), 2);
457 EXPECT_EQ(intermediary1_node->GetData().child_ids[0], leaf2_id);
458 EXPECT_EQ(intermediary1_node->GetData().child_ids[1], leaf3_id);
459 EXPECT_EQ(intermediary1_node->GetName(), "intermediary 1");
460
461 EXPECT_EQ(intermediary2_node->GetChildCount(), 1);
462 EXPECT_EQ(intermediary2_node->GetData().child_ids[0], leaf1_id);
463 EXPECT_EQ(intermediary2_node->GetName(), "intermediary 2");
464
465 EXPECT_EQ(leaf1_node->GetChildCount(), 0);
466 EXPECT_EQ(leaf1_node->GetName(), "leaf 1");
467
468 EXPECT_EQ(leaf2_node->GetChildCount(), 0);
469 EXPECT_EQ(leaf2_node->GetName(), "leaf 2");
470
471 EXPECT_EQ(leaf3_node->GetChildCount(), 0);
472 EXPECT_EQ(leaf3_node->GetName(), "leaf 3");
473
474 // Intermediary 1 and intermediary 2 have new children.
475 // Leaf 1, 2, and 3 are all moved.
476 ASSERT_EQ(bridge->accessibility_events.size(), size_t{5});
477 EXPECT_THAT(bridge->accessibility_events,
478 Contains(ui::AXEventGenerator::Event::CHILDREN_CHANGED).Times(2));
479 EXPECT_THAT(bridge->accessibility_events,
480 Contains(ui::AXEventGenerator::Event::SUBTREE_CREATED).Times(3));
481 }
482
483 // Verify that a node with a child can be moved from one parent to another.
484 TEST(AccessibilityBridgeTest, CanReparentNodeWithChild) {
485 std::shared_ptr<TestAccessibilityBridge> bridge =
486 std::make_shared<TestAccessibilityBridge>();
487
488 int32_t root_id = 0;
489 int32_t intermediary1_id = 1;
490 int32_t intermediary2_id = 2;
491 int32_t leaf1_id = 3;
492
493 std::vector<int32_t> root_children{intermediary1_id, intermediary2_id};
494 std::vector<int32_t> intermediary1_children{leaf1_id};
495 FlutterSemanticsNode2 root =
496 CreateSemanticsNode(root_id, "root", &root_children);
497 FlutterSemanticsNode2 intermediary1 = CreateSemanticsNode(
498 intermediary1_id, "intermediary 1", &intermediary1_children);
499 FlutterSemanticsNode2 intermediary2 =
500 CreateSemanticsNode(intermediary2_id, "intermediary 2");
501 FlutterSemanticsNode2 leaf1 = CreateSemanticsNode(leaf1_id, "leaf 1");
502
503 bridge->AddFlutterSemanticsNodeUpdate(root);
504 bridge->AddFlutterSemanticsNodeUpdate(intermediary1);
505 bridge->AddFlutterSemanticsNodeUpdate(intermediary2);
506 bridge->AddFlutterSemanticsNodeUpdate(leaf1);
507 bridge->CommitUpdates();
508 bridge->accessibility_events.clear();
509
510 // Move intermediary1 from root to intermediary 2.
511 int32_t new_root_children[] = {intermediary2_id};
512 root.child_count = 1;
513 root.children_in_traversal_order = new_root_children;
514
515 int32_t new_intermediary2_children[] = {intermediary1_id};
516 intermediary2.child_count = 1;
517 intermediary2.children_in_traversal_order = new_intermediary2_children;
518
519 bridge->AddFlutterSemanticsNodeUpdate(root);
520 bridge->AddFlutterSemanticsNodeUpdate(intermediary1);
521 bridge->AddFlutterSemanticsNodeUpdate(intermediary2);
522 bridge->AddFlutterSemanticsNodeUpdate(leaf1);
523 bridge->CommitUpdates();
524
525 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(root_id).lock();
526 auto intermediary1_node =
527 bridge->GetFlutterPlatformNodeDelegateFromID(intermediary1_id).lock();
528 auto intermediary2_node =
529 bridge->GetFlutterPlatformNodeDelegateFromID(intermediary2_id).lock();
530 auto leaf1_node =
531 bridge->GetFlutterPlatformNodeDelegateFromID(leaf1_id).lock();
532
533 EXPECT_EQ(root_node->GetChildCount(), 1);
534 EXPECT_EQ(root_node->GetData().child_ids[0], intermediary2_id);
535 EXPECT_EQ(root_node->GetName(), "root");
536
537 EXPECT_EQ(intermediary2_node->GetChildCount(), 1);
538 EXPECT_EQ(intermediary2_node->GetData().child_ids[0], intermediary1_id);
539 EXPECT_EQ(intermediary2_node->GetName(), "intermediary 2");
540
541 EXPECT_EQ(intermediary1_node->GetChildCount(), 1);
542 EXPECT_EQ(intermediary1_node->GetData().child_ids[0], leaf1_id);
543 EXPECT_EQ(intermediary1_node->GetName(), "intermediary 1");
544
545 EXPECT_EQ(leaf1_node->GetChildCount(), 0);
546 EXPECT_EQ(leaf1_node->GetName(), "leaf 1");
547
548 ASSERT_EQ(bridge->accessibility_events.size(), size_t{5});
549
550 EXPECT_THAT(bridge->accessibility_events,
551 Contains(ui::AXEventGenerator::Event::CHILDREN_CHANGED).Times(2));
552 EXPECT_THAT(bridge->accessibility_events,
553 Contains(ui::AXEventGenerator::Event::SUBTREE_CREATED).Times(1));
554
555 // Intermediary 2 becomes a parent node. It updates to group role and enables
556 // its 'clip children' attribute.
557 EXPECT_THAT(
558 bridge->accessibility_events,
559 Contains(ui::AXEventGenerator::Event::OTHER_ATTRIBUTE_CHANGED).Times(1));
560 EXPECT_THAT(bridge->accessibility_events,
561 Contains(ui::AXEventGenerator::Event::ROLE_CHANGED).Times(1));
562 }
563
564 TEST(AccessibilityBridgeTest, AXTreeManagerTest) {
565 std::shared_ptr<TestAccessibilityBridge> bridge =
566 std::make_shared<TestAccessibilityBridge>();
567
568 ui::AXTreeID tree_id = bridge->GetTreeID();
569 ui::AXTreeManager* manager =
570 ui::AXTreeManagerMap::GetInstance().GetManager(tree_id);
571 ASSERT_EQ(manager, static_cast<ui::AXTreeManager*>(bridge.get()));
572 }
573
574 TEST(AccessibilityBridgeTest, LineBreakingObjectTest) {
575 std::shared_ptr<TestAccessibilityBridge> bridge =
576 std::make_shared<TestAccessibilityBridge>();
577
578 const int32_t root_id = 0;
579
580 FlutterSemanticsNode2 root = CreateSemanticsNode(root_id, "root", {});
581
582 bridge->AddFlutterSemanticsNodeUpdate(root);
583 bridge->CommitUpdates();
584
585 auto root_node = bridge->GetFlutterPlatformNodeDelegateFromID(root_id).lock();
586 auto root_data = root_node->GetData();
587 EXPECT_TRUE(root_data.HasBoolAttribute(
588 ax::mojom::BoolAttribute::kIsLineBreakingObject));
589 EXPECT_TRUE(root_data.GetBoolAttribute(
590 ax::mojom::BoolAttribute::kIsLineBreakingObject));
591 }
592
593 } // namespace testing
594 } // namespace flutter
fake_delegate
flutter::FakeDelegate fake_delegate
Definition: FlutterEnginePlatformViewTest.mm:70
accessibility_bridge.h
AccessibilityBridgeTest
Definition: accessibility_bridge_test.mm:136
flutter::testing::TEST
TEST(AccessibilityBridgeTest, BasicTest)
Definition: accessibility_bridge_unittests.cc:45
flutter::testing::CreateSemanticsNode
FlutterSemanticsNode2 CreateSemanticsNode(int32_t id, const char *label, const std::vector< int32_t > *children=nullptr)
Definition: accessibility_bridge_unittests.cc:20
flutter::testing::kEmptyFlags
FlutterSemanticsFlags kEmptyFlags
Definition: accessibility_bridge_unittests.cc:18
flutter
Definition: accessibility_bridge.h:26
test_accessibility_bridge.h