Fixed: FileSystem.waitForFile: do not crash if directory does not exist yet

lib/helper/FileSystem.js

@@ -84,12 +84,12 @@ class FileSystem extends Helper {
    */
   async waitForFile(name, sec = 1) {
     if (sec === 0) assert.fail('Use `seeFile` instead of waiting 0 seconds!')
-    const waitTimeout = sec * 1000
     this.file = path.join(this.dir, name)
     this.debugSection('File', this.file)
-    return isFileExists(this.file, waitTimeout).catch(() => {
-      throw new Error(`file (${name}) still not present in directory ${this.dir} after ${waitTimeout / 1000} sec`)
-    })
+    for (const t = Date.now() + sec * 1000; !fileExists(this.file); ) {
+      if (t < Date.now()) throw new Error(`file (${name}) still not present in directory ${this.dir} after ${sec} sec`)
+      await new Promise(resolve => setTimeout(resolve, 500))
+    }
   }
 
   /**
@@ -192,36 +192,3 @@ function getFileContents(file, encoding = 'utf8') {
   if (encoding === '') assert.fail('Encoding is an empty string, please set a valid encoding')
   return fs.readFileSync(file, encoding)
 }
-
-/**
- * @param {string} file
- * @param {number} timeout
- * @private
- * @returns {Promise<any>}
- */
-function isFileExists(file, timeout) {
-  return new Promise((resolve, reject) => {
-    const timer = setTimeout(() => {
-      watcher.close()
-      reject(new Error('File did not exists and was not created during the timeout.'))
-    }, timeout)
-
-    const dir = path.dirname(file)
-    const basename = path.basename(file)
-    const watcher = fs.watch(dir, (eventType, filename) => {
-      if (eventType === 'rename' && filename === basename) {
-        clearTimeout(timer)
-        watcher.close()
-        resolve()
-      }
-    })
-
-    fs.access(file, fs.constants.R_OK, err => {
-      if (!err) {
-        clearTimeout(timer)
-        watcher.close()
-        resolve()
-      }
-    })
-  })
-}