chromium/src/third_party/blink/web_tests/http/tests/devtools/console/console-format-broken-unicode.js

// Copyright 2017 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.

(async function() {
  TestRunner.addResult(`Tests that console logging dumps proper messages with broken Unicode.\n`);

  await TestRunner.loadModule('console_test_runner');
  await TestRunner.showPanel('console');

  await TestRunner.evaluateInPagePromise(`
    var str = "  \uD835\uDC14\uD835\uDC0D\uD835\uDC08\uD835\uDC02\uD835\uDC0E\uD835\uDC03\uD835\uDC04"; // "  UNICODE"
    var brokenSurrogate = str.substring(0, str.length - 1);
    var obj = { foo: brokenSurrogate };
    obj[brokenSurrogate] = "foo";
  `);

  ConsoleTestRunner.evaluateInConsole('obj');
  ConsoleTestRunner.evaluateInConsole('[obj]');
  ConsoleTestRunner.evaluateInConsole('obj.foo');
  ConsoleTestRunner.evaluateInConsole('[obj.foo]');
  TestRunner.deprecatedRunAfterPendingDispatches(step1);

  function step1() {
    ConsoleTestRunner.waitForRemoteObjectsConsoleMessages(step2);
  }

  function step2() {
    ConsoleTestRunner.expandConsoleMessages(step3);
  }

  function step3() {
    ConsoleTestRunner.expandConsoleMessages(step4, expandFirstArrayIndexFilter);
  }

  function step4() {
    TestRunner.evaluateInPage('obj.foo', step5);
  }

  function step5(result) {
    var text = result;
    TestRunner.assertEquals(15, text.length, 'text length');
    // It's important that this last character in |text| is an unbalanced UTF16
    // low surrogate (|text| is invalid UTF16, allowed by Javascript), as
    // opposed to some replacement character that came from transcoding to UTF8
    // and back to valid UTF16.
    TestRunner.assertEquals('\uD835', text[text.length - 1]);
    TestRunner.assertEquals(4, countTextNodes(text), 'nodes count');
    TestRunner.assertEquals(1, countTextNodes('"' + text + '"'), 'nodes with quoted text count');
    TestRunner.addResult('PASS: Found all nodes with the broken text');
    TestRunner.completeTest();
  }

  function expandFirstArrayIndexFilter(treeElement) {
    var propertyName = treeElement.nameElement && treeElement.nameElement.textContent;
    return propertyName === '0';
  }

  function countTextNodes(textContent) {
    ConsoleTestRunner.disableConsoleViewport();
    var count = 0;
    var viewMessages = Console.ConsoleView.instance()._visibleViewMessages;

    for (var i = 0; i < viewMessages.length; ++i) {
      var node = viewMessages[i].contentElement();
      var currentNode = node;

      while (currentNode = currentNode.traverseNextNode(node)) {
        if (currentNode.nodeType === Node.TEXT_NODE && currentNode.nodeValue === textContent)
          ++count;
      }
    }

    return count;
  }
})();