Function expectWarning

test/common/index.js:708–728

(nameOrMap, expected, code)

// name/description pair.
// The expected messages have to be unique per `expectWarning()` call.
function expectWarning(nameOrMap, expected, code) {
  if (catchWarning === undefined) {
    catchWarning = {};
    process.on('warning', (warning) => {
      if (!catchWarning[warning.name]) {
        throw new TypeError(
          `"${warning.name}" was triggered without being expected.\n` +
          inspect(warning),
        );
      }
      catchWarning[warning.name](warning);
    });
  }
  if (typeof nameOrMap === 'string') {
    catchWarning[nameOrMap] = _expectWarning(nameOrMap, expected, code);
  } else {
    Object.keys(nameOrMap).forEach((name) => {
      catchWarning[name] = _expectWarning(name, nameOrMap[name]);
    });
  }
}

// Useful for testing expected internal/error objects
function expectsError(validator, exact) {