Working SimpleHTML test front end

tools/testing/dart/html_test.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/**
+ * Classes and methods for running HTML tests.
+ *
+ * HTML tests are valid HTML files whose names end in _htmltest.html, and that
+ * contain annotations specifying the scripts in the test and the
+ * messages the test should post to its window, in order to pass.
+ */
+library html_test;
+
+import "dart:convert";
+import "dart:io";
+
+import "test_suite.dart";
+import "utils.dart";
+
+RegExp htmlAnnotation =
+    new RegExp("START_HTML_DART_TEST([\\s\\S]*?)END_HTML_DART_TEST");
+
+HtmlTestInformation getInformation(String filename) {
+  if (!filename.endsWith("_htmltest.html")) {
+    DebugLogger.warning("File $filename is not an HTML test."
+        " Should end in _htmltest.html.");
+    return null;
+  }
+  String contents = new File(filename).readAsStringSync();
+  var match = htmlAnnotation.firstMatch(contents);
+  if (match == null) return null;
+  var annotation = JSON.decode(match[1]);
+  if (annotation is! Map || annotation['expectedMessages'] is! List ||
+      annotation['scripts'] is! List) {
+    DebugLogger.warning("File $filename does not have expected annotation."
+        " Should have {'scripts':[...], 'expectedMessages':[...]}");
+    return null;
+  }
+  return new HtmlTestInformation(new Path(filename),
+                                 annotation['expectedMessages'],
+                                 annotation['scripts']);
+}
+
+String getContents(HtmlTestInformation info) {
+  String contents = new File(info.filePath.toNativePath()).readAsStringSync();
+  return contents.replaceFirst(htmlAnnotation, '');
+}