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/gfx/test/ui_cocoa_test_helper.h"
  16
  17 namespace content {
  18
  19 class BrowserAccessibilityTest : public ui::CocoaTest {
  20  public:
  21   void SetUp() override {
  22     CocoaTest::SetUp();
  23     RebuildAccessibilityTree();
  24   }
  25
  26  protected:
  27   void RebuildAccessibilityTree() {
  28     ui::AXNodeData root;
  29     root.id = 1000;
  30     root.location.set_width(500);
  31     root.location.set_height(100);
  32     root.role = ui::AX_ROLE_ROOT_WEB_AREA;
  33     root.AddStringAttribute(ui::AX_ATTR_HELP, "HelpText");
  34     root.child_ids.push_back(1001);
  35     root.child_ids.push_back(1002);
  36
  37     ui::AXNodeData child1;
  38     child1.id = 1001;
  39     child1.SetName("Child1");
  40     child1.location.set_width(250);
  41     child1.location.set_height(100);
  42     child1.role = ui::AX_ROLE_BUTTON;
  43
  44     ui::AXNodeData child2;
  45     child2.id = 1002;
  46     child2.location.set_x(250);
  47     child2.location.set_width(250);
  48     child2.location.set_height(100);
  49     child2.role = ui::AX_ROLE_HEADING;
  50
  51     manager_.reset(
  52         new BrowserAccessibilityManagerMac(
  53             nil,
  54             MakeAXTreeUpdate(root, child1, child2),
  55             NULL));
  56     accessibility_.reset([manager_->GetRoot()->ToBrowserAccessibilityCocoa()
  57         retain]);
  58   }
  59
  60   base::scoped_nsobject<BrowserAccessibilityCocoa> accessibility_;
  61   scoped_ptr<BrowserAccessibilityManager> manager_;
  62 };
  63
  64 // Standard hit test.
  65 TEST_F(BrowserAccessibilityTest, HitTestTest) {
  66   BrowserAccessibilityCocoa* firstChild =
  67       [accessibility_ accessibilityHitTest:NSMakePoint(50, 50)];
  68   EXPECT_NSEQ(@"Child1",
  69       [firstChild accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
  70 }
  71
  72 // Test doing a hit test on the edge of a child.
  73 TEST_F(BrowserAccessibilityTest, EdgeHitTest) {
  74   BrowserAccessibilityCocoa* firstChild =
  75       [accessibility_ accessibilityHitTest:NSZeroPoint];
  76   EXPECT_NSEQ(@"Child1",
  77       [firstChild accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
  78 }
  79
  80 // This will test a hit test with invalid coordinates.  It is assumed that
  81 // the hit test has been narrowed down to this object or one of its children
  82 // so it should return itself since it has no better hit result.
  83 TEST_F(BrowserAccessibilityTest, InvalidHitTestCoordsTest) {
  84   BrowserAccessibilityCocoa* hitTestResult =
  85       [accessibility_ accessibilityHitTest:NSMakePoint(-50, 50)];
  86   EXPECT_NSEQ(accessibility_, hitTestResult);
  87 }
  88
  89 // Test to ensure querying standard attributes works.
  90 TEST_F(BrowserAccessibilityTest, BasicAttributeTest) {
  91   NSString* helpText = [accessibility_
  92       accessibilityAttributeValue:NSAccessibilityHelpAttribute];
  93   EXPECT_NSEQ(@"HelpText", helpText);
  94 }
  95
  96 // Test querying for an invalid attribute to ensure it doesn't crash.
  97 TEST_F(BrowserAccessibilityTest, InvalidAttributeTest) {
  98   NSString* shouldBeNil = [accessibility_
  99       accessibilityAttributeValue:@"NSAnInvalidAttribute"];
 100   EXPECT_TRUE(shouldBeNil == nil);
 101 }
 102
 103 TEST_F(BrowserAccessibilityTest, RetainedDetachedObjectsReturnNil) {
 104   // Get the first child.
 105   BrowserAccessibilityCocoa* retainedFirstChild =
 106       [accessibility_ accessibilityHitTest:NSMakePoint(50, 50)];
 107   EXPECT_NSEQ(@"Child1", [retainedFirstChild
 108       accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 109
 110   // Retain it. This simulates what the system might do with an
 111   // accessibility object.
 112   [retainedFirstChild retain];
 113
 114   // Rebuild the accessibility tree, which should detach |retainedFirstChild|.
 115   RebuildAccessibilityTree();
 116
 117   // Now any attributes we query should return nil.
 118   EXPECT_EQ(nil, [retainedFirstChild
 119       accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 120
 121   // Don't leak memory in the test.
 122   [retainedFirstChild release];
 123 }
 124
 125 }  // namespace content