Hit breakpoints in single line closures.

runtime/vm/debugger_test.cc

 // Copyright (c) 2013, 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 "vm/dart_api_impl.h"
 #include "vm/dart_api_message.h"
 #include "vm/debugger.h"
 #include "vm/message.h"
 #include "vm/unit_test.h"
 
@@ skipping 112 matching lines @@
   result = Dart_SetBreakpoint(url, 17);
   EXPECT_VALID(result);
   EXPECT(Dart_IsInteger(result));
   EXPECT_VALID(Dart_IntegerToInt64(result, &closure_bp_id[2]));
 
   result = Dart_SetBreakpoint(url, 19);
   EXPECT_VALID(result);
   EXPECT(Dart_IsInteger(result));
   EXPECT_VALID(Dart_IntegerToInt64(result, &closure_bp_id[3]));
 
+  // Cannot set breakpoint at the start of the class definition.
+  // The implicit constructor token position matches that of the
+  // class definition's token position. So, we do not want to
+  // allow setting breakpoints in implicit consturctors.
+  result = Dart_SetBreakpoint(url, 8);
+  EXPECT_ERROR(result, "could not set breakpoint at line 8");
+
   result = Dart_SetBreakpoint(url, 20);
   EXPECT_ERROR(result, "could not set breakpoint at line 20");
 
   EXPECT(debugger->GetBreakpointById(closure_bp_id[0]) != NULL);
   EXPECT(debugger->GetBreakpointById(closure_bp_id[1]) != NULL);
   EXPECT(debugger->GetBreakpointById(closure_bp_id[2]) != NULL);
   EXPECT(debugger->GetBreakpointById(closure_bp_id[3]) != NULL);
 
   Dart_SetPausedEventHandler(PausedInClosuresHandler);
   result = Dart_Invoke(lib, NewString("main"), 0, NULL);
   EXPECT_VALID(result);
-  // TODO(sivachandra): Understand why a breakpoint on a single line
-  // functional literal is not being hit. When that issue is resolved,
-  // adjust this test to check hitting the breakpoint at line 19 also.
-  EXPECT(closure_hit_count == 3);
+  EXPECT(closure_hit_count == 4);
 }
 
 TEST_CASE(Debugger_RemoveBreakpoint) {
   const char* kScriptChars =
       "main() {\n"
       "  var x = new StringBuffer();\n"
       "  x.add('won');\n"
       "  x.add('too');\n"
       "  return x.toString();\n"
       "}\n";
@@ skipping 422 matching lines @@
       "enter(bar1) enter(bar2) enter(bar3) enter(foo) "
       "enter(bar3) enter(foo) "
       "exit(foo) exit(bar3) exit(bar2) exit(bar1) ",
       result_cstr);
   EXPECT(saw_paused_event);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart