Adds testing infrastructure to web_ui_browsertest to support testing HtmlDialogs.

chrome/test/data/webui/certificate_viewer_dialog_test.js

+// Copyright (c) 2011 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.
+
+/**
+ * Tests that the dialog opened to the correct URL.
+ * @param {string} url The URL to verify against, passed in from C++ to use the
+ *                     value in url_constants.cc.
+ */
+function testDialogURL(url) {
+  assertEquals(url, window.location.href);
+}
+
+/**
+ * Tests for the correct common name in the test certificate.
+ */
+function testCN() {
+  assertEquals('www.google.com', $('issued-cn').textContent);
+}
+
+/**
+ * Test the details pane of the certificate viewer. This verifies that a
+ * certificate in the chain can be selected to view the fields. And that fields
+ * can be selected to view their values.
+ */
+function testDetails() {
+  var certHierarchy = $('hierarchy');
+  var certFields = $('cert-fields');
+  var certFieldVal = $('cert-field-value');
+
+  // There must be at least one certificate in the hierarchy.
+  assertLT(0, certHierarchy.childNodes.length);
+  // No certificate fields should be currently loaded.
+  assertEquals(0, certFields.childNodes.length);
+
+  // Select the first certificate on the chain and ensure the details show up.
+  // Override the receive certificate function to catch when fields are loaded.
+  var getCertificateFields = cert_viewer.getCertificateFields;
+  cert_viewer.getCertificateFields = function(certFieldDetails) {
+    getCertificateFields(certFieldDetails);
+    cert_viewer.getCertificateFields = getCertificateFields;
+    runAssertions('testDetails', function() {
+      assertLT(0, certFields.childNodes.length);
+
+      // Test that a field can be selected to see the details for that field.
+      var item = getElementWithValue(certFields);
+      assertNotEquals(null, item);
+      certFields.selectedItem = item;
+      assertEquals(item.detail.payload.val, certFieldVal.textContent);
+
+      // Test that selecting an item without a value empties the field.
+      certFields.selectedItem = certFields.childNodes[0];
+      assertEquals('', certFieldVal.textContent);
+
+      testDone();
+    });
+  }
+  certHierarchy.selectedItem = certHierarchy.childNodes[0];
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Support functions

[Sheridan Rawlins, 2011/09/09 15:47:50]

I don't think you should need these - I would hope there's enough support as
long as you kick off the test from Javascript with TEST_F.

[flackr, 2011/09/15 18:41:52]

The issue I'm having is that the callback functions aren't running from a
context in which thrown errors are caught. The error is reported on the console
and the test waits indefinitely for testDone to be called. I suspect I am just
missing something though. 

+
+/**
+ * Run a block of code failing the asynchronous test on any failed assertions.
+ * @param {string} testName The name of the test being run (for error messages).
+ * @param {function()} f A function to run which may throw an exception.
+ */
+function runAssertions(testName, f) {
+  var result = runTestFunction(testName, f, []);
+  if (!result[0])
+    testDone();
+}
+
+/**
+ * Find the first tree item (in the certificate fields tree) with a value.
+ * @param {!Element} tree Certificate fields subtree to search.
+ * @return {Element} The first found element with a value, or null if not found.
+ */
+function getElementWithValue(tree) {
+  for (var i = 0; i < tree.childNodes.length; i++) {
+    var element = tree.childNodes[i];
+    if (element.detail && element.detail.payload && element.detail.payload.val)
+      return element;
+    if (element = getElementWithValue(element))
+      return element;
+  }
+  return null;
+}