observatory/vm: add support for computing/passing end tokens on classes

runtime/vm/object_test.cc

 // Copyright (c) 2012, 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.
 
 #include "platform/globals.h"
 
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
@@ skipping 203 matching lines @@
   Script& script = Script::Handle(Script::New(url,
                                               source,
                                               RawScript::kScriptTag));
   script.Tokenize(String::Handle(String::New("")));
   const TokenStream& tokens = TokenStream::Handle(script.tokens());
   const String& gen_source = String::Handle(tokens.GenerateSource());
   EXPECT_STREQ(source.ToCString(), gen_source.ToCString());
 }
 
 
+TEST_CASE(Class_ComputeEndTokenPos) {
+  const char* kScript =
+  "\n"
+  "class A {\n"
+  "  /**\n"
+  "   * Description of foo().\n"
+  "   */\n"
+  "  foo(a) { return '''\"}'''; }\n"
+  "  // }\n"
+  "  var bar = '\\'}';\n"
+  "  var baz = \"${foo('}')}\";\n"
+  "}\n";
+  Dart_Handle lib_h = TestCase::LoadTestScript(kScript, NULL);
+  EXPECT_VALID(lib_h);
+  Library& lib = Library::Handle();
+  lib ^= Api::UnwrapHandle(lib_h);
+  EXPECT(!lib.IsNull());
+  const Class& cls = Class::Handle(
+      lib.LookupClass(String::Handle(String::New("A"))));
+  EXPECT(!cls.IsNull());
+  const intptr_t end_token_pos = cls.ComputeEndTokenPos();
+  const Script& scr = Script::Handle(cls.script());
+  intptr_t line;
+  intptr_t col;
+  scr.GetTokenLocation(end_token_pos, &line, &col);
+  EXPECT(line == 10 && col == 1);
+}
+
+
 TEST_CASE(InstanceClass) {
   // Allocate the class first.
   String& class_name = String::Handle(Symbols::New("EmptyClass"));
   Script& script = Script::Handle();
   const Class& empty_class =
       Class::Handle(CreateDummyClass(class_name, script));
 
   // EmptyClass has no fields and no functions.
   EXPECT_EQ(Array::Handle(empty_class.fields()).Length(), 0);
   EXPECT_EQ(Array::Handle(empty_class.functions()).Length(), 0);
@@ skipping 3871 matching lines @@
   EXPECT_VALID(h_result);
   Integer& result = Integer::Handle();
   result ^= Api::UnwrapHandle(h_result);
   String& foo = String::Handle(String::New("foo"));
   Integer& expected = Integer::Handle();
   expected ^= foo.HashCode();
   EXPECT(result.IsIdenticalTo(expected));
 }
 
 }  // namespace dart