All files / lib/internal/streams state.js

100% Statements 36/36
100% Branches 17/17
100% Functions 3/3
100% Lines 36/36

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 3719x 19x 19x 19x 19x 19x 19x 19x 19x 147838x 147838x 147838x 147838x 19x 177193x 177193x 177193x 19x 147838x 147838x 147838x 18299x 14x 14x 14x 18285x 18285x 129539x 129539x 129539x 147838x 19x 19x 19x 19x 19x  
'use strict';
 
const {
  MathFloor,
  NumberIsInteger,
} = primordials;
 
const { ERR_INVALID_ARG_VALUE } = require('internal/errors').codes;
 
function highWaterMarkFrom(options, isDuplex, duplexKey) {
  return options.highWaterMark != null ? options.highWaterMark :
    isDuplex ? options[duplexKey] : null;
}
 
function getDefaultHighWaterMark(objectMode) {
  return objectMode ? 16 : 16 * 1024;
}
 
function getHighWaterMark(state, options, duplexKey, isDuplex) {
  const hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
  if (hwm != null) {
    if (!NumberIsInteger(hwm) || hwm < 0) {
      const name = isDuplex ? `options.${duplexKey}` : 'options.highWaterMark';
      throw new ERR_INVALID_ARG_VALUE(name, hwm);
    }
    return MathFloor(hwm);
  }
 
  // Default value
  return getDefaultHighWaterMark(state.objectMode);
}
 
module.exports = {
  getHighWaterMark,
  getDefaultHighWaterMark
};