All files / lib/internal/streams lazy_transform.js

100% Statements 66/66
100% Branches 8/8
100% Functions 3/3
100% Lines 66/66

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 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 6722x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 2169x 2169x 2169x 22x 22x 22x 2480x 2480x 66x 66x 66x 66x 64x 64x 66x 66x 2480x 2480x 22x 2480x 2480x 132x 132x 132x 132x 132x 132x 132x 2480x 2480x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x  
// LazyTransform is a special type of Transform stream that is lazily loaded.
// This is used for performance with bi-API-ship: when two APIs are available
// for the stream, one conventional and one non-conventional.
'use strict';
 
const {
  ObjectDefineProperties,
  ObjectDefineProperty,
  ObjectSetPrototypeOf,
} = primordials;
 
const stream = require('stream');
 
const {
  getDefaultEncoding
} = require('internal/crypto/util');
 
module.exports = LazyTransform;
 
function LazyTransform(options) {
  this._options = options;
}
ObjectSetPrototypeOf(LazyTransform.prototype, stream.Transform.prototype);
ObjectSetPrototypeOf(LazyTransform, stream.Transform);
 
function makeGetter(name) {
  return function() {
    stream.Transform.call(this, this._options);
    this._writableState.decodeStrings = false;
 
    if (!this._options || !this._options.defaultEncoding) {
      this._writableState.defaultEncoding = getDefaultEncoding();
    }
 
    return this[name];
  };
}
 
function makeSetter(name) {
  return function(val) {
    ObjectDefineProperty(this, name, {
      __proto__: null,
      value: val,
      enumerable: true,
      configurable: true,
      writable: true
    });
  };
}
 
ObjectDefineProperties(LazyTransform.prototype, {
  _readableState: {
    __proto__: null,
    get: makeGetter('_readableState'),
    set: makeSetter('_readableState'),
    configurable: true,
    enumerable: true
  },
  _writableState: {
    __proto__: null,
    get: makeGetter('_writableState'),
    set: makeSetter('_writableState'),
    configurable: true,
    enumerable: true
  }
});