test: improve message in test-fs-readfile-pipe-large

Improve assertion message by including expected and actual values. PR-URL: #16840 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Michaël Zasso <[email protected]> Reviewed-By: Gireesh Punathil <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>
nodejs · Nov 16, 2017 · ec4c3f5 · ec4c3f5
1 parent 562d8fc
commit ec4c3f5
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/test/parallel/test-fs-readfile-pipe-large.js b/test/parallel/test-fs-readfile-pipe-large.js
@@ -29,8 +29,16 @@ const node = JSON.stringify(process.execPath);
 const cmd = `cat ${filename} | ${node} ${f} child`;
 exec(cmd, { maxBuffer: 1000000 }, function(err, stdout, stderr) {
   assert.ifError(err);
-  assert.strictEqual(stdout, dataExpected, 'it reads the file and outputs it');
-  assert.strictEqual(stderr, '', 'it does not write to stderr');
+  assert.strictEqual(
+    stdout,
+    dataExpected,
+    `expect it reads the file and outputs 999999 'a' but got : ${stdout}`
+  );
+  assert.strictEqual(
+    stderr,
+    '',
+    `expect that it does not write to stderr, but got : ${stderr}`
+  );
   console.log('ok');
 });