[debug-wrapper] Further extend the debug wrapper

test/mjsunit/es6/regress/regress-468661.js

-// Copyright 2015 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.
-
-// Flags: --expose-debug-as debug
-
-Debug = debug.Debug
-var exception = null;
-var break_count = 0;
-const expected_breaks = 9;
-
-var expected_values =
-  [ReferenceError, undefined, 0, 0, 0, 0, 1,
-   ReferenceError, ReferenceError];
-
-function listener(event, exec_state, event_data, data) {
-  try {
-    if (event == Debug.DebugEvent.Break) {
-      assertTrue(exec_state.frameCount() != 0, "FAIL: Empty stack trace");
-      var frameMirror = exec_state.frame(0);
-
-      var v = null;;
-      try {
-        v = frameMirror.evaluate('i').value();
-      } catch(e) {
-        v = e;
-      }
-      frameMirror.allScopes();
-      var source = frameMirror.sourceLineText();
-      print("paused at: " + source);
-      assertTrue(source.indexOf("// Break " + break_count + ".") > 0,
-                 "Unexpected pause at: " + source + "\n" +
-                 "Expected: // Break " + break_count + ".");
-      if (expected_values[break_count] === ReferenceError) {
-        assertTrue(v instanceof ReferenceError);
-      } else {
-        assertSame(expected_values[break_count], v);
-      }
-      ++break_count;
-
-      if (break_count !== expected_breaks) {
-        exec_state.prepareStep(Debug.StepAction.StepIn);
-        print("Next step prepared");
-      }
-    }
-  } catch(e) {
-    exception = e;
-    print(e, e.stack);
-  }
-};
-
-Debug.setListener(listener);
-
-var sum = 0;
-(function (){
-  'use strict';
-
-  debugger; // Break 0.
-
-  for (let i=0; // Break 1.
-       i < 1;   // Break 2.  // Break 6.
-       i++) {   // Break 5.
-    let key = i; // Break 3.
-    sum += key;   // Break 4.
-  }
-}()); // Break 7.
-
-assertNull(exception); // Break 8.
-assertEquals(expected_breaks, break_count);
-
-Debug.setListener(null);