fs: complete error message for validate function

PR-URL: https://github.com/nodejs/node/pull/19909
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/test/parallel/test-fs-truncate.js b/test/parallel/test-fs-truncate.js
index 62da52b38e..2f88395832 100644
--- a/test/parallel/test-fs-truncate.js
+++ b/test/parallel/test-fs-truncate.js
@@ -190,6 +190,31 @@ function testFtruncate(cb) {
     );
   });
 
+  [-1.5, 1.5].forEach((input) => {
+    assert.throws(
+      () => fs.ftruncate(fd, input),
+      {
+        code: 'ERR_OUT_OF_RANGE',
+        name: 'RangeError [ERR_OUT_OF_RANGE]',
+        message: 'The value of "len" is out of range. It must be ' +
+                  `an integer. Received ${input}`
+      }
+    );
+  });
+
+  // 2 ** 31 = 2147483648
+  [2147483648, -2147483649].forEach((input) => {
+    assert.throws(
+      () => fs.ftruncate(fd, input),
+      {
+        code: 'ERR_OUT_OF_RANGE',
+        name: 'RangeError [ERR_OUT_OF_RANGE]',
+        message: 'The value of "len" is out of range. It must be ' +
+                  `> -2147483649 && < 2147483648. Received ${input}`
+      }
+    );
+  });
+
   fs.ftruncate(fd, undefined, common.mustCall(function(err) {
     assert.ifError(err);
     assert(fs.readFileSync(file5).equals(Buffer.from('')));