[debugger] Further stepping support in test wrapper

test/mjsunit/debug-stepin-constructor.js

-// Copyright 2008 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:
-//
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-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
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-//       with the distribution.
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-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
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-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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-// 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
-
-// Simple debug event handler which counts the number of breaks hit and steps.
-var break_break_point_hit_count = 0;
-function listener(event, exec_state, event_data, data) {
-  if (event == Debug.DebugEvent.Break) {
-    break_break_point_hit_count++;
-    // Continue stepping until returned to bottom frame.
-    if (exec_state.frameCount() > 1) {
-      exec_state.prepareStep(Debug.StepAction.StepIn);
-    }
-
-    // Test that there is a script.
-    assertTrue(typeof(event_data.func().script()) == 'object');
-  }
-};
-
-// Add the debug event listener.
-Debug.setListener(listener);
-
-// Test step into constructor with simple constructor.
-function X() {
-}
-
-function f() {
-  debugger;
-  new X();
-};
-
-break_break_point_hit_count = 0;
-f();
-assertEquals(5, break_break_point_hit_count);
-f();
-assertEquals(10, break_break_point_hit_count);
-f();
-assertEquals(15, break_break_point_hit_count);
-
-// Test step into constructor with builtin constructor.
-function g() {
-  debugger;
-  new Date();
-};
-
-break_break_point_hit_count = 0;
-g();
-assertEquals(4, break_break_point_hit_count);
-
-// Get rid of the debug event listener.
-Debug.setListener(null);