Add a mechanism to ignore certain elements for accessibility audit on a per-test basis.

chrome/test/data/webui/test_api.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Library providing basic test framework functionality.
  */
 
 /**
  * Namespace for |Test|.
@@ skipping 870 matching lines @@
     throw new Error(helper.getCallMessage(message));
   }
 
   /**
    * Run an accessibility audit on the current page state.
    * @type {Function}
    * @return {boolean} Whether there were any errors or warnings
    * @private
    */
   function runAccessibilityAudit(a11yErrors, a11yWarnings) {
-    var auditResults = axs.Audit.run();
+    var auditResults = axs.Audit.run(this.auditConfig);
     for (var i = 0; i < auditResults.length; i++) {
       var auditResult = auditResults[i];
       if (auditResult.result == axs.constants.AuditResult.FAIL) {
         var auditRule = auditResult.rule;
         // TODO(aboxhall): more useful error messages (sadly non-trivial)
         if (auditRule.severity == axs.constants.Severity.Severe)
           a11yErrors.push(accessibilityErrorMessage(auditRule, auditResult));
         else
           a11yWarnings.push(accessibilityErrorMessage(auditRule, auditResult));
       }
@@ skipping 66 matching lines @@
                  ' of ' + result.elements.length + '):';
 
     var maxElements = Math.min(result.elements.length, 5);
     for (var i = 0; i < maxElements; i++)
       message += '\n' + axs.utils.getQuerySelectorText(result.elements[i]);
     return message;
   }
 
   /**
    * Asserts that the current page state passes the accessibility audit.
+   * @param {Array=} opt_errors Array to fill with errors, if desired.
+   * @param {Array=} opt_warnings Array to fill with warnings, if desired.
    */
-  function assertAccessibilityOk() {
+  function assertAccessibilityOk(opt_errors, opt_warnings) {
     helper.registerCall();
-    var a11yErrors = [];
-    var a11yWarnings = [];
+    var a11yErrors = opt_errors || [];
+    var a11yWarnings = opt_warnings || [];
     if (!runAccessibilityAudit(a11yErrors, a11yWarnings))
       throw new Error(accessibilityAuditReport(a11yErrors, a11yWarnings));
   }
 
   /**
    * Creates a function based upon a function that thows an exception on
    * failure. The new function stuffs any errors into the |errors| array for
    * checking by runTest. This allows tests to continue running other checks,
    * while failing the overall test if any errors occurrred.
    * @param {Function} assertFunc The function which may throw an Error.
@@ skipping 605 matching lines @@
   exports.TEST = TEST;
   exports.TEST_F = TEST_F;
   exports.RUNTIME_TEST_F = TEST_F;
   exports.GEN = GEN;
   exports.GEN_INCLUDE = GEN_INCLUDE;
   exports.WhenTestDone = WhenTestDone;
 
   // Import the Mock4JS helpers.
   Mock4JS.addMockSupport(exports);
 })(this);