v8/test/mjsunit/debug-receiver.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --expose-debug-as debug
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug;

var test_name;
var listener_delegate;
var listener_called;
var exception;
var expected_receiver;
var begin_test_count = 0;
var end_test_count = 0;
var break_count = 0;

// Debug event listener which delegates. Exceptions have to be
// explictly caught here and checked later because exception in the
// listener are not propagated to the surrounding JavaScript code.
function listener(event, exec_state, event_data, data) {
  try {
    if (event == Debug.DebugEvent.Break) {
      break_count++;
      listener_called = true;
      listener_delegate(exec_state);
    }
  } catch (e) {
    exception = e;
  }
}

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


// Initialize for a new test.
function BeginTest(name) {
  test_name = name;
  listener_called = false;
  exception = null;
  begin_test_count++;
}


// Check result of a test.
function EndTest() {
  assertTrue(listener_called, "listerner not called for " + test_name);
  assertNull(exception, test_name);
  end_test_count++;
}


// Check that the debugger correctly reflects that the receiver is not
// converted to object for strict mode functions.
function Strict() { "use strict"; debugger; }
function TestStrict(receiver) {
  expected_receiver = receiver;
  Strict.call(receiver);
}

listener_delegate = function(exec_state) {
  var receiver = exec_state.frame().receiver();
  assertTrue(!receiver.isObject());
  assertEquals(expected_receiver, receiver.value())
}

BeginTest("strict: undefined"); TestStrict(undefined); EndTest();
BeginTest("strict: null"); TestStrict(null); EndTest();
BeginTest("strict: 1"); TestStrict(1); EndTest();
BeginTest("strict: 1.2"); TestStrict(1.2); EndTest();
BeginTest("strict: 'asdf'"); TestStrict('asdf'); EndTest();
BeginTest("strict: true"); TestStrict(true); EndTest();


// Check that the debugger correctly reflects the object conversion of
// the receiver for non-strict mode functions.
function NonStrict() { debugger; }
function TestNonStrict(receiver) {
  // null and undefined should be transformed to the global object and
  // primitives should be wrapped.
  expected_receiver = (receiver == null) ? this : Object(receiver);
  NonStrict.call(receiver);
}

listener_delegate = function(exec_state) {
  var receiver = exec_state.frame().receiver();
  assertTrue(receiver.isObject());
  assertEquals(expected_receiver, receiver.value());
}

BeginTest("non-strict: undefined"); TestNonStrict(undefined); EndTest();
BeginTest("non-strict: null"); TestNonStrict(null); EndTest();
BeginTest("non-strict: 1"); TestNonStrict(1); EndTest();
BeginTest("non-strict: 1.2"); TestNonStrict(1.2); EndTest();
BeginTest("non-strict: 'asdf'"); TestNonStrict('asdf'); EndTest();
BeginTest("non-strict: true"); TestNonStrict(true); EndTest();


assertEquals(begin_test_count, break_count,
             'one or more tests did not enter the debugger');
assertEquals(begin_test_count, end_test_count,
             'one or more tests did not have its result checked');