Test for anything falsey as a fail value for element.accessibleNode. Test for anything truthy as a …

third_party/WebKit/LayoutTests/accessibility/aom.html

Index: third_party/WebKit/LayoutTests/accessibility/aom.html
diff --git a/third_party/WebKit/LayoutTests/accessibility/aom.html b/third_party/WebKit/LayoutTests/accessibility/aom.html
index c77de58b0073e0c4b805175188f0138cc2d43e33..0c308068986b227bb5fa8d28fa60d6b674f970dc 100644
--- a/third_party/WebKit/LayoutTests/accessibility/aom.html
+++ b/third_party/WebKit/LayoutTests/accessibility/aom.html
@@ -20,14 +20,14 @@ if (window.internals)
 test(function(t) {
     var button = document.getElementById("button");
     assert_equals(button.nodeType, Node.ELEMENT_NODE);
-    assert_not_equals(button.accessibleNode, null);
+    assert_true(Boolean(button.accessibleNode));
 }, "DOM Elements have an AccessibleNode");

[aleventhal, 2017/04/17 20:58:19]

This was passing when it shouldn't, because accessibleNode was undefined.

 
 test(function(t) {
     var button = document.getElementById("button");
     var staticText = button.firstChild;
     assert_equals(staticText.nodeType, Node.TEXT_NODE);
-    assert_not_equals(staticText.accessibleNode, null);
+    assert_false(Boolean(staticText.accessibleNode));
 }, "DOM Text nodes do not have an AccessibleNode.");

[aleventhal, 2017/04/17 20:58:19]

The description of this test is opposite from what's being tested, and we should
also care about the  undefined case.

 
 test(function(t) {