[debugger] Further stepping support in test wrapper

test/mjsunit/debug-stepnext-do-while.js

-// Copyright 2009 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --expose-debug-as debug
-// Get the Debug object exposed from the debug context global object.
-Debug = debug.Debug
-
-var exception = null;
-var break_break_point_hit_count = 0;
-
-function listener(event, exec_state, event_data, data) {
-  try {
-    if (event == Debug.DebugEvent.Break) {
-      if (break_break_point_hit_count == 0) {
-        assertEquals('    debugger;',
-                     event_data.sourceLineText());
-        assertEquals('runDoWhile', event_data.func().name());
-      } else if (break_break_point_hit_count == 1) {
-        assertEquals('  } while(condition());',
-                     event_data.sourceLineText());
-        assertEquals('runDoWhile', event_data.func().name());
-      }
-
-      break_break_point_hit_count++;
-      // Continue stepping until returned to bottom frame.
-      if (exec_state.frameCount() > 1) {
-        exec_state.prepareStep(Debug.StepAction.StepNext);
-      }
-
-    }
-  } catch(e) {
-    exception = e;
-  }
-};
-
-// Add the debug event listener.
-Debug.setListener(listener);
-
-function condition() {
-  return false;
-}
-
-function runDoWhile() {
-  do {
-    debugger;
-  } while(condition());
-};
-
-break_break_point_hit_count = 0;
-runDoWhile();
-assertNull(exception);
-assertEquals(4, break_break_point_hit_count);
-
-// Get rid of the debug event listener.
-Debug.setListener(null);