v8/test/mjsunit/debug-changebreakpoint.js

// Copyright 2008 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

// Simple function which stores the last debug event.
listenerComplete = false;
exception = false;

var breakpoint = -1;
var base_request = '"seq":0,"type":"request","command":"changebreakpoint"'

function safeEval(code) {
  try {
    return eval('(' + code + ')');
  } catch (e) {
    assertEquals(void 0, e);
    return undefined;
  }
}

function testArguments(dcp, arguments, success) {
  var request = '{' + base_request + ',"arguments":' + arguments + '}'
  var json_response = dcp.processDebugJSONRequest(request);
  var response = safeEval(json_response);
  if (success) {
    assertTrue(response.success, json_response);
  } else {
    assertFalse(response.success, json_response);
  }
}

function listener(event, exec_state, event_data, data) {
  try {
  if (event == Debug.DebugEvent.Break) {
    // Get the debug command processor.
    var dcp = exec_state.debugCommandProcessor("unspecified_running_state");

    // Test some illegal clearbreakpoint requests.
    var request = '{' + base_request + '}'
    var response = safeEval(dcp.processDebugJSONRequest(request));
    assertFalse(response.success);

    testArguments(dcp, '{}', false);
    testArguments(dcp, '{"breakpoint":0,"condition":"false"}', false);
    testArguments(dcp, '{"breakpoint":' + (breakpoint + 1) + ',"condition":"false"}', false);
    testArguments(dcp, '{"breakpoint":"xx","condition":"false"}', false);

    // Test some legal clearbreakpoint requests.
    var bp_str = '"breakpoint":' + breakpoint;;
    testArguments(dcp, '{' + bp_str + '}', true);
    testArguments(dcp, '{' + bp_str + ',"enabled":"true"}', true);
    testArguments(dcp, '{' + bp_str + ',"enabled":"false"}', true);
    testArguments(dcp, '{' + bp_str + ',"condition":"1==2"}', true);
    testArguments(dcp, '{' + bp_str + ',"condition":"false"}', true);

    // Indicate that all was processed.
    listenerComplete = true;
  }
  } catch (e) {
    exception = e
  };
};

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

function g() {};

// Set a break point and call to invoke the debug event listener.
breakpoint = Debug.setBreakPoint(g, 0, 0);
g();

// Make sure that the debug event listener vas invoked.
assertTrue(listenerComplete, "listener did not run to completion");
assertFalse(exception, "exception in listener")