Update web-platform-tests to revision be959408023fe02cf79abe70f6018598a7004a88

tests/wpt/web-platform-tests/resources/test/variants.js

@@ -0,0 +1,57 @@
+(function() {
+  'use strict';
+  var variants = {
+    /**
+     * Tests are executed in the absence of the global Promise constructor by
+     * default in order to verify support for the Server browser engine.
+     *
+     * https://github.com/w3c/web-platform-tests/issues/6266
+     */
+    'default': {
+      description: 'Global Promise constructor removed.',
+      apply: function() {
+        delete window.Promise;
+      }
+    },
+    /**
+     * This variant allows for testing functionality that is fundamentally
+     * dependent on Promise support, e.g. the `promise_test` function
+     */
+    'keep-promise': {
+      description: 'No modification of global environment.',
+      apply: function() {}
+    }
+  };
+  var match = window.location.search.match(/\?(.*)$/);
+  var variantName = (match && match[1]) || 'default';
+
+  if (!Object.hasOwnProperty.call(variants, variantName)) {
+    window.location = 'javascript:"Unrecognized variant: ' + variantName + '";';
+    document.close();
+    return;
+  }
+
+  if (typeof test === 'function') {
+    test(function() {
+      assert_unreached('variants.js must be included before testharness.js');
+    });
+  }
+  var variant = variants[variantName];
+
+  var variantNode = document.createElement('div');
+  variantNode.innerHTML = '<p>This testharness.js test was executed with ' +
+    'the variant named, "' + variantName + '". ' + variant.description +
+    '</p><p>Refer to the test harness README file for more information.</p>';
+  function onReady() {
+    if (document.readyState !== 'complete') {
+      return;
+    }
+
+    document.body.insertBefore(variantNode, document.body.firstChild);
+  }
+
+  onReady();
+  document.addEventListener('readystatechange', onReady);
+
+  variant.apply();
+}());