test: error when empty buffer is passed to filehandle.read()

Added tests to occur error when empty buffer is passed to filehandle.read() to increase coverage. PR-URL: #23250 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Sakthipriyan Vairamani <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]>
nodejs · Oct 10, 2018 · a8530bc · a8530bc
1 parent b6dcf8c
commit a8530bc
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/test/parallel/test-fs-read-empty-buffer.js b/test/parallel/test-fs-read-empty-buffer.js
@@ -6,6 +6,7 @@ const assert = require('assert');
 const fs = require('fs');
 const filepath = fixtures.path('x.txt');
 const fd = fs.openSync(filepath, 'r');
+const fsPromises = fs.promises;
 
 const buffer = new Uint8Array();
 
@@ -26,3 +27,15 @@ assert.throws(
     'Received Uint8Array []'
   }
 );
+
+(async () => {
+  const filehandle = await fsPromises.open(filepath, 'r');
+  assert.rejects(
+    () => filehandle.read(buffer, 0, 1, 0),
+    {
+      code: 'ERR_INVALID_ARG_VALUE',
+      message: 'The argument \'buffer\' is empty and cannot be written. ' +
+               'Received Uint8Array []'
+    }
+  );
+})();