v8/test/debugger/debug/debug-stepout-scope-part6.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// Check that the ScopeIterator can properly recreate the scope at
// every point when stepping through functions.

var Debug = debug.Debug;

function listener(event, exec_state, event_data, data) {
  if (event == Debug.DebugEvent.Break) {
    // Access scope details.
    var scope_count = exec_state.frame().scopeCount();
    for (var i = 0; i < scope_count; i++) {
      var scope = exec_state.frame().scope(i);
      // assertTrue(scope.isScope());
      scope.scopeType();
      scope.scopeObject();
    }

    // Do steps until we reach the global scope again.
    exec_state.prepareStep(Debug.StepAction.StepIn);
  }
}

Debug.setListener(listener);

var q = 42;
var prefixes = [ "debugger; ",
                 "if (false) { try { throw 0; } catch(x) { this.x = x; } }; debugger; " ];
var bodies = [ "1",
               "1 ",
               "1;",
               "1; ",
               "q",
               "q ",
               "q;",
               "q; ",
               "try { throw 'stuff' } catch (e) { e = 1; }",
               "try { throw 'stuff' } catch (e) { e = 1; } ",
               "try { throw 'stuff' } catch (e) { e = 1; };",
               "try { throw 'stuff' } catch (e) { e = 1; }; " ];


// Test global eval and function constructor.
for (var i = 0; i < prefixes.length; ++i) {
  var pre = prefixes[i];
  for (var j = 0; j < bodies.length; ++j) {
    var body = bodies[j];
    eval("'use strict'; " + pre + body);
  }
}