[html5lib] implement querySelector/querySelectorAll

pkg/third_party/html5lib/test/selectors/level1_baseline_test.dart

Index: pkg/third_party/html5lib/test/selectors/level1_baseline_test.dart
diff --git a/pkg/third_party/html5lib/test/selectors/level1_baseline_test.dart b/pkg/third_party/html5lib/test/selectors/level1_baseline_test.dart
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+/// Test for the Selectors API ported from
+/// <https://github.com/w3c/web-platform-tests/tree/master/selectors-api>
+///
+/// Note, unlike the original we don't operate in-browser on a DOM loaded into
+/// an iframe, but instead operate over a parsed DOM.
+library html5lib.test.selectors.level1_baseline_test;
+
+import 'dart:io';
+import 'package:html5lib/dom.dart';
+import 'package:html5lib/parser.dart';
+import 'package:unittest/unittest.dart';
+import 'level1_lib.dart' hide test;
+import 'selectors.dart';
+
+Document getTestContentDocument() {
+  var testPath = Platform.script.resolve('level1-content.html').toFilePath();
+  return parse(new File(testPath).readAsStringSync());
+}
+
+var testType = TEST_QSA_BASELINE; // Only run baseline tests.
+var docType  = "html"; // Only run tests suitable for HTML
+
+main() {
+  /*
+   * This test suite tests Selectors API methods in 4 different contexts:
+   * 1. Document node
+   * 2. In-document Element node
+   * 3. Detached Element node (an element with no parent, not in the document)
+   * 4. Document Fragment node
+   *
+   * For each context, the following tests are run:
+   *
+   * The interface check tests ensure that each type of node exposes the Selectors API methods
+   *
+   * The special selector tests verify the result of passing special values for the selector parameter,
+   * to ensure that the correct WebIDL processing is performed, such as stringification of null and
+   * undefined and missing parameter. The universal selector is also tested here, rather than with the
+   * rest of ordinary selectors for practical reasons.
+   *
+   * The static list verification tests ensure that the node lists returned by the method remain unchanged
+   * due to subsequent document modication, and that a new list is generated each time the method is
+   * invoked based on the current state of the document.
+   *
+   * The invalid selector tests ensure that SyntaxError is thrown for invalid forms of selectors
+   *
+   * The valid selector tests check the result from querying many different types of selectors, with a
+   * list of expected elements. This checks that querySelector() always returns the first result from
+   * querySelectorAll(), and that all matching elements are correctly returned in tree-order. The tests
+   * can be limited by specifying the test types to run, using the testType variable. The constants for this
+   * can be found in selectors.js.
+   *
+   * All the selectors tested for both the valid and invalid selector tests are found in selectors.js.
+   * See comments in that file for documentation of the format used.
+   *
+   * The level1-lib.js file contains all the common test functions for running each of the aforementioned tests
+   */
+
+  // Prepare the nodes for testing
+  //doc = frame.contentDocument;                 // Document Node tests
+  doc = getTestContentDocument();
+
+  var element = doc.getElementById("root");   // In-document Element Node tests
+
+  //Setup the namespace tests
+  setupSpecialElements(element);
+
+  var outOfScope = element.clone(true);   // Append this to the body before running the in-document
+                                               // Element tests, but after running the Document tests. This
+                                               // tests that no elements that are not descendants of element
+                                               // are selected.
+
+  traverse(outOfScope, (elem) {        // Annotate each element as being a clone; used for verifying
+    elem.attributes["data-clone"] = "";     // that none of these elements ever match.
+  });
+
+  var detached = element.clone(true);     // Detached Element Node tests
+
+  var fragment = doc.createDocumentFragment(); // Fragment Node tests
+  fragment.append(element.clone(true));
+
+  // Setup Tests
+  interfaceCheck("Document", doc);
+  interfaceCheck("Detached Element", detached);
+  interfaceCheck("Fragment", fragment);
+  interfaceCheck("In-document Element", element);
+
+  runSpecialSelectorTests("Document", doc);
+  runSpecialSelectorTests("Detached Element", detached);
+  runSpecialSelectorTests("Fragment", fragment);
+  runSpecialSelectorTests("In-document Element", element);
+
+  verifyStaticList("Document", doc);
+  verifyStaticList("Detached Element", detached);
+  verifyStaticList("Fragment", fragment);
+  verifyStaticList("In-document Element", element);
+
+  // TODO(jmesserly): fix negative tests
+  //runInvalidSelectorTest("Document", doc, invalidSelectors);
+  //runInvalidSelectorTest("Detached Element", detached, invalidSelectors);
+  //runInvalidSelectorTest("Fragment", fragment, invalidSelectors);
+  //runInvalidSelectorTest("In-document Element", element, invalidSelectors);
+
+  runValidSelectorTest("Document", doc, validSelectors, testType, docType);
+  runValidSelectorTest("Detached Element", detached, validSelectors, testType, docType);
+  runValidSelectorTest("Fragment", fragment, validSelectors, testType, docType);
+
+  group('out of scope', () {
+    setUp(() {
+      doc.body.append(outOfScope); // Append before in-document Element tests.
+                                   // None of these elements should match
+    });
+    tearDown(() {
+      outOfScope.remove();
+    });
+    runValidSelectorTest("In-document Element", element, validSelectors, testType, docType);
+  });
+}