fixup: test

Author: ronag

test/parallel/test-stream-writable-ended-state.js

@@ -9,17 +9,24 @@ const writable = new stream.Writable();
 
 writable._write = (chunk, encoding, cb) => {
   assert.strictEqual(writable._writableState.ended, false);
+  assert.strictEqual(writable._writableState.writable, undefined);
   assert.strictEqual(writable.writableEnded, false);
   cb();
 };
 
 assert.strictEqual(writable._writableState.ended, false);
+assert.strictEqual(writable._writableState.writable, undefined);
+assert.strictEqual(writable.writable, true);
 assert.strictEqual(writable.writableEnded, false);
 
 writable.end('testing ended state', common.mustCall(() => {
   assert.strictEqual(writable._writableState.ended, true);
+  assert.strictEqual(writable._writableState.writable, undefined);
+  assert.strictEqual(writable.writable, false);
   assert.strictEqual(writable.writableEnded, true);
 }));
 
 assert.strictEqual(writable._writableState.ended, true);
+assert.strictEqual(writable._writableState.writable, undefined);
+assert.strictEqual(writable.writable, false);
 assert.strictEqual(writable.writableEnded, true);