test: buffer should always be stringified

This test makes sure that independently of the buffer type, the input is always stringified and generates a valid input. PR-URL: #12355 Reviewed-By: Vse Mozhet Byt <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Sakthipriyan Vairamani <[email protected]>

Author: lucamaraschi

test/parallel/test-fs-buffertype-writesync.js

@@ -0,0 +1,20 @@
+'use strict';
+constcommon=require('../common');
+
+// This test ensures that writeSync does support inputs which
+// are then correctly converted into string buffers.
+
+constassert=require('assert');
+constfs=require('fs');
+constpath=require('path');
+
+constfilePath=path.join(common.tmpDir,'test_buffer_type');
+constv=[true,false,0,1,Infinity,common.noop,{},[],undefined,null];
+
+common.refreshTmpDir();
+
+v.forEach((value)=>{
+constfd=fs.openSync(filePath,'w');
+fs.writeSync(fd,value);
+assert.strictEqual(fs.readFileSync(filePath).toString(),value+'');
+});