v8/test/mjsunit/debug-evaluate-with-context.js

// Copyright 2008 the V8 project authors. All rights reserved.
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// Flags: --expose-debug-as debug
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug

var evaluate_callback;

function listener(event, exec_state, event_data, data) {
  if (event !== Debug.DebugEvent.Break) return;
  try {
    var context = { what_is_capybara: "a fish" };
    var context2 = { what_is_capybara: "a fish", what_is_parrot: "a beard" };

    // Try in frame's scope.
    var local_expression =
        "(what_is_capybara ? what_is_capybara : 'a beast') + '/' + what_is_parrot";
    var result = evaluate_callback.in_top_frame(exec_state, local_expression, context);
    assertEquals('a fish/a bird', result);

    // Try in frame's scope with overrididen local variables.
    var result = evaluate_callback.in_top_frame(exec_state, local_expression, context2);
    assertEquals('a fish/a beard', result);

    // Try in frame's scope, without context.
    var local_expression2 = "what_is_parrot";
    var result = evaluate_callback.in_top_frame(exec_state, local_expression2, void 0);
    assertEquals('a bird', result);

    // Try in global additional scope.
    var global_expression = "what_is_capybara ? what_is_capybara : 'a beast'";
    var result = evaluate_callback.globally(exec_state, global_expression, context);
    assertEquals('a fish', result);

    // Try in global scope with overridden global variables.
    var context_with_undefined = { undefined: 'kitten' };
    var global_expression2 = "'cat' + '/' + undefined";
    var result = evaluate_callback.globally(exec_state, global_expression2, context_with_undefined);
    assertEquals('cat/kitten', result);

    // Try in global scope with no overridden global variables.
    var result = evaluate_callback.globally(exec_state, global_expression2, void 0);
    assertEquals('cat/undefined', result);

    // Try in global scope without additional context.
    var global_expression3 = "'cat' + '/' + 'dog'";
    var result = evaluate_callback.globally(exec_state, global_expression3, void 0);
    assertEquals('cat/dog', result);

    listenerComplete = true;
  } catch (e) {
    exception = e
  };
};


function f() {
  var what_is_parrot = "a bird";
  debugger;
};

function runF() {
  exception = false;
  listenerComplete = false;

  Debug.setListener(listener);

  // Add the debug event listener.
  Debug.setListener(listener);

  f();

  assertFalse(exception, "exception in listener")
  assertTrue(listenerComplete);
}

evaluate_callback = {
  in_top_frame: function(exec_state, expression, additional_context) {
    return exec_state.frame(0).evaluate(expression, void 0, additional_context).value();
  },
  globally: function(exec_state, expression, additional_context) {
    return exec_state.evaluateGlobal(expression, void 0, additional_context).value();
  },
};


runF();

// Now try all the same, but via debug protocol.

function evaluateViaProtocol(exec_state, expression, additional_context, frame_argument_adder) {
  var dcp = exec_state.debugCommandProcessor("unspecified_running_state");
  request_json = {"seq":17,"type":"request","command":"evaluate", arguments: { "expression": expression } };
  frame_argument_adder(request_json.arguments);
  if (additional_context) {
    var context_json = [];
    for (var key in additional_context) {
      context_json.push({ name: key, handle: Debug.MakeMirror(additional_context[key]).handle() });
    }
    request_json.arguments.additional_context = context_json;
  }
  var request = JSON.stringify(request_json);
  var response_json = dcp.processDebugJSONRequest(request);
  var response = JSON.parse(response_json);

  assertTrue(response.success);
  var str_result = response.body.value;
  return str_result;
}

evaluate_callback = {
  in_top_frame: function(exec_state, expression, additional_context) {
    return evaluateViaProtocol(exec_state, expression, additional_context, function(args) { args.frame = 0; });
  },
  globally: function(exec_state, expression, additional_context) {
    return evaluateViaProtocol(exec_state, expression, additional_context, function(args) { args.global = true; });
  },
};

runF();