v8/test/mjsunit/debug-setexceptionbreak.js

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// Flags: --expose-debug-as debug
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug

// Note: the following tests only checks the debugger handling of the
// setexceptionbreak command.  It does not test whether the debugger
// actually breaks on exceptions or not.  That functionality is tested
// in test-debug.cc instead.

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

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

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

function testArguments(dcp, arguments, success, type, enabled) {
  var request = '{' + base_request + ',"arguments":' + arguments + '}'
  var json_response = dcp.processDebugJSONRequest(request);
  var response = safeEval(json_response);
  if (success) {
    assertTrue(response.success, json_response);
    assertEquals(response.body.type, type);
    assertEquals(response.body.enabled, enabled);
  } 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 setexceptionbreak requests.
    var request = '{' + base_request + '}'
    var response = safeEval(dcp.processDebugJSONRequest(request));
    assertFalse(response.success);

    testArguments(dcp, '{}', false);
    testArguments(dcp, '{"type":0}', false);

    // Test some legal setexceptionbreak requests with default.
    // Note: by default, break on exceptions should be disabled.  Hence,
    // the first time, we send the command with no enabled arg, the debugger
    // should toggle it on.  The second time, it should toggle it off.
    testArguments(dcp, '{"type":"all"}', true, "all", true);
    testArguments(dcp, '{"type":"all"}', true, "all", false);
    testArguments(dcp, '{"type":"uncaught"}', true, "uncaught", true);
    testArguments(dcp, '{"type":"uncaught"}', true, "uncaught", false);

    // Test some legal setexceptionbreak requests with explicit enabled arg.
    testArguments(dcp, '{"type":"all","enabled":true}', true, "all", true);
    testArguments(dcp, '{"type":"all","enabled":false}', true, "all", false);

    testArguments(dcp, '{"type":"uncaught","enabled":true}', true,
                  "uncaught", true);
    testArguments(dcp, '{"type":"uncaught","enabled":false}', true,
                  "uncaught", false);

    // 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.
assertFalse(exception, "exception in listener")
assertTrue(listenerComplete, "listener did not run to completion");