test: refactor test-stream2-writable

* Use common.mustCall() to confirm that _write() is called only once. * Check that _write() is called with the correct argument PR-URL: #13823 Reviewed-By: Gibson Fahnestock <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Refael Ackermann <[email protected]>
nodejs · Jun 24, 2017 · b23f246 · b23f246
1 parent 0ef687e
commit b23f246
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/test/parallel/test-stream2-writable.js b/test/parallel/test-stream2-writable.js
@@ -294,7 +294,9 @@ for (let i = 0; i < chunks.length; i++) {
 {
   // Verify that end(chunk) twice is an error
   const w = new W();
-  w._write = common.noop;
+  w._write = common.mustCall((msg) => {
+    assert.strictEqual(msg.toString(), 'this is the end');
+  });
   let gotError = false;
   w.on('error', function(er) {
     gotError = true;