test[nodeJS] 048 File truncation (async)

"048-5 Tuncating file with #truncate:len:with:"
'Content generated by S8.Content generated by S8.Content generated by S8.' outputToFile: (TestPath,'Sample48-5.txt').
NodeJS fs truncate: (TestPath,'Sample48-5.txt') len:1 with:[:error| 
   error isNil ifFalse:[ ^self error: '048-5 ', error]
].

"048-6 Truncating file with #ftruncate:len:with:"
| fs |
fs := NodeJS fs.
fs open:(TestPath, 'Sample48-6.txt') flags:#w mode: 0666 with: [:error :fd| 
   error isNil ifFalse: [self error: '048-6 ' ,error].
   fs write: fd data: 'Content generated by S8.Content generated by S8.Content generated by S8' position: 0 encoding: #utf8 with:[:er :written :string|
      er isNil ifFalse: [^self error:'048-6 ', er].
      [fs fsyncSync: fd] 
         on: Error
         do: [:ex| ^self error: '048-6 ' ,ex].
      fs ftruncate: fd len:1 with:[:e|
         e isNil ifFalse:[ ^self error: '048-6 '].
         fs closeSync:fd.  
      ].          
   ].   
].