content/browser/accessibility/browser_accessibility_mac_unittest.mm

   1 // Copyright (c) 2012 The Chromium 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 #import <Cocoa/Cocoa.h>
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/strings/string_util.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "content/browser/accessibility/browser_accessibility_cocoa.h"
  11 #include "content/browser/accessibility/browser_accessibility_manager.h"
  12 #include "content/browser/accessibility/browser_accessibility_manager_mac.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14 #import "testing/gtest_mac.h"
  15 #import "ui/base/test/ui_cocoa_test_helper.h"
  16
  17 @interface MockAccessibilityDelegate :
  18     NSView<BrowserAccessibilityDelegateCocoa>
  19
  20 - (NSPoint)accessibilityPointInScreen:(NSPoint)origin
  21                                  size:(NSSize)size;
  22 - (void)doDefaultAction:(int32)accessibilityObjectId;
  23 - (void)accessibilitySetTextSelection:(int32)accId
  24                           startOffset:(int32)startOffset
  25                             endOffset:(int32)endOffset;
  26 - (void)performShowMenuAction:(BrowserAccessibilityCocoa*)accessibility;
  27 - (void)setAccessibilityFocus:(BOOL)focus
  28               accessibilityId:(int32)accessibilityObjectId;
  29 - (NSWindow*)window;
  30
  31 @end
  32
  33 @implementation MockAccessibilityDelegate
  34
  35 - (NSPoint)accessibilityPointInScreen:(NSPoint)origin
  36                                  size:(NSSize)size {
  37   return NSZeroPoint;
  38 }
  39 - (void)doDefaultAction:(int32)accessibilityObjectId {
  40 }
  41 - (void)accessibilitySetTextSelection:(int32)accId
  42                           startOffset:(int32)startOffset
  43                             endOffset:(int32)endOffset {
  44 }
  45 - (void)performShowMenuAction:(BrowserAccessibilityCocoa*)accessibility {
  46 }
  47 - (void)setAccessibilityFocus:(BOOL)focus
  48               accessibilityId:(int32)accessibilityObjectId {
  49 }
  50 - (NSWindow*)window {
  51   return nil;
  52 }
  53
  54 @end
  55
  56 namespace content {
  57
  58 class BrowserAccessibilityTest : public ui::CocoaTest {
  59  public:
  60   virtual void SetUp() {
  61     CocoaTest::SetUp();
  62     RebuildAccessibilityTree();
  63   }
  64
  65  protected:
  66   void RebuildAccessibilityTree() {
  67     ui::AXNodeData root;
  68     root.id = 1000;
  69     root.location.set_width(500);
  70     root.location.set_height(100);
  71     root.role = ui::AX_ROLE_ROOT_WEB_AREA;
  72     root.AddStringAttribute(ui::AX_ATTR_HELP, "HelpText");
  73     root.child_ids.push_back(1001);
  74     root.child_ids.push_back(1002);
  75
  76     ui::AXNodeData child1;
  77     child1.id = 1001;
  78     child1.SetName("Child1");
  79     child1.location.set_width(250);
  80     child1.location.set_height(100);
  81     child1.role = ui::AX_ROLE_BUTTON;
  82
  83     ui::AXNodeData child2;
  84     child2.id = 1002;
  85     child2.location.set_x(250);
  86     child2.location.set_width(250);
  87     child2.location.set_height(100);
  88     child2.role = ui::AX_ROLE_HEADING;
  89
  90     delegate_.reset([[MockAccessibilityDelegate alloc] init]);
  91     manager_.reset(
  92         new BrowserAccessibilityManagerMac(delegate_, root, NULL));
  93     manager_->UpdateNodesForTesting(child1, child2);
  94     accessibility_.reset([manager_->GetRoot()->ToBrowserAccessibilityCocoa()
  95         retain]);
  96   }
  97
  98   base::scoped_nsobject<MockAccessibilityDelegate> delegate_;
  99   base::scoped_nsobject<BrowserAccessibilityCocoa> accessibility_;
 100   scoped_ptr<BrowserAccessibilityManager> manager_;
 101 };
 102
 103 // Standard hit test.
 104 TEST_F(BrowserAccessibilityTest, HitTestTest) {
 105   BrowserAccessibilityCocoa* firstChild =
 106       [accessibility_ accessibilityHitTest:NSMakePoint(50, 50)];
 107   EXPECT_NSEQ(@"Child1",
 108       [firstChild accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 109 }
 110
 111 // Test doing a hit test on the edge of a child.
 112 TEST_F(BrowserAccessibilityTest, EdgeHitTest) {
 113   BrowserAccessibilityCocoa* firstChild =
 114       [accessibility_ accessibilityHitTest:NSZeroPoint];
 115   EXPECT_NSEQ(@"Child1",
 116       [firstChild accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 117 }
 118
 119 // This will test a hit test with invalid coordinates.  It is assumed that
 120 // the hit test has been narrowed down to this object or one of its children
 121 // so it should return itself since it has no better hit result.
 122 TEST_F(BrowserAccessibilityTest, InvalidHitTestCoordsTest) {
 123   BrowserAccessibilityCocoa* hitTestResult =
 124       [accessibility_ accessibilityHitTest:NSMakePoint(-50, 50)];
 125   EXPECT_NSEQ(accessibility_, hitTestResult);
 126 }
 127
 128 // Test to ensure querying standard attributes works.
 129 TEST_F(BrowserAccessibilityTest, BasicAttributeTest) {
 130   NSString* helpText = [accessibility_
 131       accessibilityAttributeValue:NSAccessibilityHelpAttribute];
 132   EXPECT_NSEQ(@"HelpText", helpText);
 133 }
 134
 135 // Test querying for an invalid attribute to ensure it doesn't crash.
 136 TEST_F(BrowserAccessibilityTest, InvalidAttributeTest) {
 137   NSString* shouldBeNil = [accessibility_
 138       accessibilityAttributeValue:@"NSAnInvalidAttribute"];
 139   EXPECT_TRUE(shouldBeNil == nil);
 140 }
 141
 142 TEST_F(BrowserAccessibilityTest, RetainedDetachedObjectsReturnNil) {
 143   // Get the first child.
 144   BrowserAccessibilityCocoa* retainedFirstChild =
 145       [accessibility_ accessibilityHitTest:NSMakePoint(50, 50)];
 146   EXPECT_NSEQ(@"Child1", [retainedFirstChild
 147       accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 148
 149   // Retain it. This simulates what the system might do with an
 150   // accessibility object.
 151   [retainedFirstChild retain];
 152
 153   // Rebuild the accessibility tree, which should detach |retainedFirstChild|.
 154   RebuildAccessibilityTree();
 155
 156   // Now any attributes we query should return nil.
 157   EXPECT_EQ(nil, [retainedFirstChild
 158       accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 159
 160   // Don't leak memory in the test.
 161   [retainedFirstChild release];
 162 }
 163
 164 }  // namespace content