All files / lib/timers promises.js

100% Statements 177/177
100% Branches 56/56
100% Functions 5/5
100% Lines 177/177

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 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 1781x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 1x 110x 110x 110x 4x 4x 4x 4x 4x 4x 106x 106x 106x 110x 6x 6x 110x 5x 5x 5x 5x 5x 5x 95x 95x 95x 110x 1x 1x 94x 94x 94x 94x 94x 3x 3x 3x 3x 3x 94x 110x 3x 3x 110x 110x 1x 22x 22x 4x 4x 4x 4x 4x 4x 18x 18x 18x 22x 6x 6x 22x 5x 5x 5x 5x 5x 5x 7x 7x 7x 22x 1x 1x 6x 6x 6x 6x 6x 3x 3x 3x 3x 3x 6x 22x 3x 3x 22x 22x 1x 58x 58x 58x 58x 58x 58x 58x 58x 41x 41x 41x 41x 41x 41x 41x 202x 202x 112x 112x 112x 41x 41x 58x 6x 4x 4x 4x 1x 1x 1x 6x 6x 6x 41x 58x 114x 114x 112x 113x 119x 83x 114x 3x 27x 10x 10x 10x 10x 58x 1x 1x 1x 1x 1x 1x  
'use strict';
 
const {
  FunctionPrototypeBind,
  Promise,
  PromiseReject,
  SafePromisePrototypeFinally,
} = primordials;
 
const {
  Timeout,
  Immediate,
  insert
} = require('internal/timers');
 
const {
  AbortError,
  codes: { ERR_INVALID_ARG_TYPE }
} = require('internal/errors');
 
const {
  validateAbortSignal,
  validateBoolean,
  validateObject,
} = require('internal/validators');
 
function cancelListenerHandler(clear, reject) {
  if (!this._destroyed) {
    clear(this);
    reject(new AbortError());
  }
}
 
function setTimeout(after, value, options = {}) {
  const args = value !== undefined ? [value] : value;
  if (options == null || typeof options !== 'object') {
    return PromiseReject(
      new ERR_INVALID_ARG_TYPE(
        'options',
        'Object',
        options));
  }
  const { signal, ref = true } = options;
  try {
    validateAbortSignal(signal, 'options.signal');
  } catch (err) {
    return PromiseReject(err);
  }
  if (typeof ref !== 'boolean') {
    return PromiseReject(
      new ERR_INVALID_ARG_TYPE(
        'options.ref',
        'boolean',
        ref));
  }
  // TODO(@jasnell): If a decision is made that this cannot be backported
  // to 12.x, then this can be converted to use optional chaining to
  // simplify the check.
  if (signal && signal.aborted) {
    return PromiseReject(new AbortError());
  }
  let oncancel;
  const ret = new Promise((resolve, reject) => {
    const timeout = new Timeout(resolve, after, args, false, ref);
    insert(timeout, timeout._idleTimeout);
    if (signal) {
      oncancel = FunctionPrototypeBind(cancelListenerHandler,
                                       // eslint-disable-next-line no-undef
                                       timeout, clearTimeout, reject);
      signal.addEventListener('abort', oncancel);
    }
  });
  return oncancel !== undefined ?
    SafePromisePrototypeFinally(
      ret,
      () => signal.removeEventListener('abort', oncancel)) : ret;
}
 
function setImmediate(value, options = {}) {
  if (options == null || typeof options !== 'object') {
    return PromiseReject(
      new ERR_INVALID_ARG_TYPE(
        'options',
        'Object',
        options));
  }
  const { signal, ref = true } = options;
  try {
    validateAbortSignal(signal, 'options.signal');
  } catch (err) {
    return PromiseReject(err);
  }
  if (typeof ref !== 'boolean') {
    return PromiseReject(
      new ERR_INVALID_ARG_TYPE(
        'options.ref',
        'boolean',
        ref));
  }
  // TODO(@jasnell): If a decision is made that this cannot be backported
  // to 12.x, then this can be converted to use optional chaining to
  // simplify the check.
  if (signal && signal.aborted) {
    return PromiseReject(new AbortError());
  }
  let oncancel;
  const ret = new Promise((resolve, reject) => {
    const immediate = new Immediate(resolve, [value]);
    if (!ref) immediate.unref();
    if (signal) {
      oncancel = FunctionPrototypeBind(cancelListenerHandler,
                                       // eslint-disable-next-line no-undef
                                       immediate, clearImmediate, reject);
      signal.addEventListener('abort', oncancel);
    }
  });
  return oncancel !== undefined ?
    SafePromisePrototypeFinally(
      ret,
      () => signal.removeEventListener('abort', oncancel)) : ret;
}
 
async function* setInterval(after, value, options = {}) {
  validateObject(options, 'options');
  const { signal, ref = true } = options;
  validateAbortSignal(signal, 'options.signal');
  validateBoolean(ref, 'options.ref');
 
  if (signal?.aborted)
    throw new AbortError();
 
  let onCancel;
  let interval;
  try {
    let notYielded = 0;
    let callback;
    interval = new Timeout(() => {
      notYielded++;
      if (callback) {
        callback();
        callback = undefined;
      }
    }, after, undefined, true, ref);
    insert(interval, interval._idleTimeout);
    if (signal) {
      onCancel = () => {
        // eslint-disable-next-line no-undef
        clearInterval(interval);
        if (callback) {
          callback(PromiseReject(new AbortError()));
          callback = undefined;
        }
      };
      signal.addEventListener('abort', onCancel, { once: true });
    }
 
    while (!signal?.aborted) {
      if (notYielded === 0) {
        await new Promise((resolve) => callback = resolve);
      }
      for (; notYielded > 0; notYielded--) {
        yield value;
      }
    }
    throw new AbortError();
  } finally {
    // eslint-disable-next-line no-undef
    clearInterval(interval);
    signal?.removeEventListener('abort', onCancel);
  }
}
 
module.exports = {
  setTimeout,
  setImmediate,
  setInterval,
};