text: // Copyright 2016 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  const Debug = new DebugWrapper();
  Debug.enable();
  
  // This test tests that full code compiled without debug break slots
  // is recompiled with debug break slots when debugging is started.
  
  var bp;
  var done = false;
  var step_count = 0;
  
  // Debug event listener which steps until the global variable done is true.
  function listener(event, exec_state, event_data, data) {
    if (event == Debug.DebugEvent.Break) {
      if (!done) Debug.stepOver();
      step_count++;
    }
  };
  
  // Set the global variables state to prpare the stepping test.
  function prepare_step_test() {
    done = false;
    step_count = 0;
  }
  
  // Test function to step through.
  function f() {
    var i = 1;
    var j = 2;
    done = true;
  };
  
  prepare_step_test();
  f();
  
  // Add the debug event listener.
  Debug.setListener(listener);
  
  bp = Debug.setBreakPoint(f, 1);
  
  prepare_step_test();
  f();
  assertEquals(4, step_count);
  Debug.clearBreakPoint(bp);
  
  // Set a breakpoint on the first var statement (line 1).
  bp = Debug.setBreakPoint(f, 1);
  
  // Step through the function ensuring that the var statements are hit as well.
  prepare_step_test();
  f();
  assertEquals(4, step_count);
  
  // Clear the breakpoint and check that no stepping happens.
  Debug.clearBreakPoint(bp);
  prepare_step_test();
  f();
  assertEquals(0, step_count);
  