MacViews a11y: Allow accessibility clients to set the AXValue on some controls.

ui/views/widget/native_widget_mac_accessibility_unittest.mm

Index: ui/views/widget/native_widget_mac_accessibility_unittest.mm
diff --git a/ui/views/widget/native_widget_mac_accessibility_unittest.mm b/ui/views/widget/native_widget_mac_accessibility_unittest.mm
index a95cf0ad3f595956c94771b595f3fb05656a0e0f..92d883872643d96cda8b5df53c96682dca1a6feb 100644
--- a/ui/views/widget/native_widget_mac_accessibility_unittest.mm
+++ b/ui/views/widget/native_widget_mac_accessibility_unittest.mm
@@ -304,4 +304,27 @@ TEST_F(NativeWidgetMacAccessibilityTest, TextfieldEditableAttributes) {
                 NSAccessibilityVisibleCharacterRangeAttribute) rangeValue]));
 }
 
+// Test writing accessibility attributes via an accessibility client.
+TEST_F(NativeWidgetMacAccessibilityTest, TextfieldWritableAttributes) {
+  AddChildTextfield(GetWidgetBounds().size());
+
+  // Get the textfield accessibility object.
+  NSPoint midpoint = gfx::ScreenPointToNSPoint(GetWidgetBounds().CenterPoint());
+  id textfield = [widget()->GetNativeWindow() accessibilityHitTest:midpoint];
+  EXPECT_TRUE(textfield);
+
+  // Make sure it's the correct accessibility object.
+  id value =
+      [textfield accessibilityAttributeValue:NSAccessibilityValueAttribute];
+  EXPECT_NSEQ(kTestStringValue, value);
+
+  // Write a new NSAccessibilityValueAttribute.
+  EXPECT_TRUE([textfield
+      accessibilityIsAttributeSettable:NSAccessibilityValueAttribute]);
+  [textfield accessibilitySetValue:kTestPlaceholderText
+                      forAttribute:NSAccessibilityValueAttribute];
+  EXPECT_NSEQ(kTestPlaceholderText,
+              AttributeValueAtMidpoint(NSAccessibilityValueAttribute));
+}

[tapted, 2016/08/11 04:23:26]

We should also check that the value of the views::TextField has been updated

[Patti Lor, 2016/08/12 01:57:42]

Done. Also added tests for a read-only textfield.

+
 }  // namespace views