Function executeIfVersion

test/test-helper.js:1984–2001

* Conditionally executes func if testVersion is <= the current cassandra version. * @param {String} testVersion Minimum version of Cassandra needed. * @param {Function} func The function to conditionally execute. * @param {Array} args the arguments to apply to the function.

(testVersion, func, args)

 * @param {Array} args the arguments to apply to the function.
 */
function executeIfVersion (testVersion, func, args) {
  const serverInfo = helper.getServerInfo();
  let invokeFunction = false;

  if (testVersion.startsWith('dse-')) {
    if (serverInfo.isDse) {
      // Compare only if the server instance is DSE
      invokeFunction = helper.versionCompare(serverInfo.version, testVersion.substr(4));
    }
  } else {
    // Use the C* version (of DSE or the actual C* version)
    invokeFunction = helper.versionCompare(helper.getCassandraVersion(), testVersion);
  }

  if (invokeFunction) {
    func.apply(this, args);
  }
}

/**
 * Policy only suitable for testing, it creates a fixed query plan containing the nodes in the same order, i.e. [a, b].