test[nodeJS] 041 Folder operations (async)

"041-5 Creating folders with #mkdir:with:"
NodeJS fs mkdir: TestPath, 'TestFOLDER1' with: [:error| 
   error isNil ifFalse: [ ^self error: '041-5' ,error]
].

"041-6 Creating folders with #mkdir:mode:with:"
NodeJS fs mkdir: TestPath, 'TestFOLDER2' mode: 0777 with: [:error| 
   error isNil ifFalse: [ ^self error: '041-6' ,error]
].

"041-7 Reading folder with #readdir:with:"
NodeJS fs readdir: TestPath with: [:error :files| 
   error isNil ifFalse: [ ^self error: '041-7 ' ,error ].
   "self print: 'OK-> 041-7 Reading folder ./ ',files asString."
].

"041-8 Deleting folders with #rmdir:with:"
NodeJS fs rmdir: TestPath, 'TestFOLDER1' with: [:error | 
   (error isNil) ifFalse: [ ^self error: '041-8 ' ,error]
].
NodeJS fs rmdir: TestPath, 'TestFOLDER2' with: [:error | 
   (error isNil) ifFalse: [ ^self error: '041-8 ' ,error]
].