Conduitry/cheap-watch
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add/update type checking

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Conduitry 2018-04-03 08:32:59 -04:00
parent 28f17d20da
commit 2c1dcfab08
1 changed files with 15 additions and 3 deletions
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18
CheapWatch.js
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@ -17,6 +17,18 @@ const _enqueue = Symbol('_enqueue');
export default class CheapWatch extends EventEmitter {
constructor({ dir, filter, watch = true, debounce = 10 }) {
if (typeof dir !== 'string') {
throw new TypeError('CheapWatch: dir must be a string');
}
if (filter && typeof filter !== 'function') {
throw new TypeError('CheapWatch: filter must be a function');
}
if (typeof watch !== 'boolean') {
throw new TypeError('CheapWatch: watch must be a boolean');
}
if (typeof debounce !== 'number') {
throw new TypeError('CheapWatch: debounce must be a number');
}
super();
// root directory
this.dir = dir;
@ -46,7 +58,7 @@ export default class CheapWatch extends EventEmitter {
// returns array of { path, stats }
async init() {
if (this[_isInited]) {
throw new Error('Cannot init a CheapWatch that has already been inited');
throw new Error('CheapWatch.init: Cannot be called twice');
}
this[_isInited] = true;
await this[_recurse](this.dir);
@ -55,10 +67,10 @@ export default class CheapWatch extends EventEmitter {
// close all FSWatchers
close() {
if (!this[_isInited]) {
throw new Error('Cannot close a CheapWatch that has not yet been inited');
throw new Error('CheapWatch.close: Cannot call before CheapWatch.init');
}
if (this[_isClosed]) {
throw new Error('Cannot close a CheapWatch that has already been closed');
throw new Error('CheapWatch.close: Cannot be called twice');
}
this[_isClosed] = true;
for (const watcher of this[_watchers].values()) {