From 9a1565e41af291bef8cbe4597d2789e64e9bc5b4 Mon Sep 17 00:00:00 2001
From: fjau <frederic.jau@orange.com>
Date: Mon, 6 Nov 2017 17:06:03 +0000
Subject: [PATCH] test: improve message in test-fs-readfile-pipe-large
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Improve assertion message by including expected and actual values.

PR-URL: https://github.com/nodejs/node/pull/16840
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
---
 test/parallel/test-fs-readfile-pipe-large.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/test/parallel/test-fs-readfile-pipe-large.js b/test/parallel/test-fs-readfile-pipe-large.js
index 4d278ee0f22..17831f81f6d 100644
--- 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');
 });