Set breakpoint at url, line number

runtime/vm/scanner_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/assert.h"
 #include "vm/os.h"
 #include "vm/scanner.h"
 #include "vm/token.h"
 #include "vm/unit_test.h"
 
@@ skipping 313 matching lines @@
 void InvalidText() {
   const Scanner::GrowableTokenStream& tokens =
       Scan("\\");
 
   EXPECT_EQ(2, tokens.length());
   CheckKind(tokens, 0, Token::kERROR);
   CheckKind(tokens, 1, Token::kEOS);
 }
 
 
+void FindLineTest() {
+  const char* source =
+      "/*1*/   \n"
+      "/*2*/   class A {\n"
+      "/*3*/      void foo() { }\n"
+      "/*4*/   }\n";
+
+  Scanner scanner(String::Handle(String::New(source)),
+                  String::Handle(String::New("")));
+
+  intptr_t token_index = scanner.TokenIndexAtLine(3);
+  EXPECT_EQ(3, token_index);
+  token_index = scanner.TokenIndexAtLine(100);
+  EXPECT(token_index < 0);
+}
+
+
 TEST_CASE(Scanner_Test) {
   ScanLargeText();
 
   BoringTest();
   CommentTest();
   GreedIsGood();
   StringEscapes();
   RawString();
   MultilineString();
   EmptyString();
   EmptyMultilineString();
   NumberLiteral();
   InvalidText();
+  FindLineTest();
 }
 
 }  // namespace dart