Implement automatic load of composed/embedded automation trees

chrome/test/data/extensions/api_test/automation/tests/desktop/load_tabs.js

+// Copyright 2014 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.
+
+var allTests = [
+  function testLoadTabs() {
+    function findAllWebAreas(node, nodes) {
+      if (node.role == chrome.automation.RoleType.webArea)
+      nodes.push(node);

[dmazzoni, 2014/10/29 06:53:30]

nit: indent

+
+      var children = node.children();
+      for (var i = 0; i < children.length; i++) {
+        var child = findAllWebAreas(children[i], nodes);
+      }
+    }
+    var webAreas = [];
+    findAllWebAreas(rootNode, webAreas);
+    assertEq(2, webAreas.length);
+    var second = webAreas[1];
+    second.load(function() {
+      var subroot = second.firstChild();
+      assertEq(chrome.automation.RoleType.rootWebArea, subroot.role);
+      var button = subroot.firstChild().firstChild();
+      assertEq(chrome.automation.RoleType.button, button.role);
+
+      var para = subroot.firstChild().lastChild().previousSibling();
+      assertEq(chrome.automation.RoleType.textField, para.role);
+      chrome.test.succeed();
+    });
+  }
+];
+
+setupAndRunTests(allTests,
+                 '<button>alpha</button><input type="text">hello</input>');