test: Sync writables may emit finish before callbacks

test/simple/test-stream2-writable.js

@@ -59,6 +59,10 @@ function run() {
 
   var name = next[0];
   var fn = next[1];
+
+  if (!fn)
+    return run();
+
   console.log('# %s', name);
   fn({
     same: assert.deepEqual,
@@ -228,10 +232,12 @@ test('write callbacks', function (t) {
   });
 
   tw.on('finish', function() {
+    process.nextTick(function() {
       t.same(tw.buffer, chunks, 'got chunks in the right order');
       t.same(callbacks._called, chunks, 'called all callbacks');
       t.end();
     });
+  });
 
   chunks.forEach(function(chunk, i) {
     tw.write(chunk, callbacks['callback-' + i]);