test: improve coverage of lib/readline.js

PR-URL: #38646
Refs: https://coverage.nodejs.org/coverage-16e00a15deafdad0/lib/readline.js.html#L441
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

test/parallel/test-readline-interface.js

@@ -1061,6 +1061,16 @@ for (let i = 0; i < 12; i++) {
  rli.close();
  }
 
+ // Calling only the first question callback
+ {
+ const [rli] = getInterface({ terminal });
+ rli.question('foo?', common.mustCall((answer) => {
+ assert.strictEqual(answer, 'bar');
+ }));
+ rli.question('hello?', common.mustNotCall());
+ rli.write('bar\n');
+ }
+
  // Calling the question multiple times
  {
  const [rli] = getInterface({ terminal });
@@ -1329,6 +1339,26 @@ for (let i = 0; i < 12; i++) {
  rli.close();
  }), delay);
  }
+
+ // Write correctly if paused
+ {
+ const [rli] = getInterface({ terminal });
+ rli.on('line', common.mustCall((line) => {
+ assert.strictEqual(line, 'bar');
+ }));
+ rli.pause();
+ rli.write('bar\n');
+ assert.strictEqual(rli.paused, false);
+ rli.close();
+ }
+
+ // Write undefined
+ {
+ const [rli] = getInterface({ terminal });
+ rli.on('line', common.mustNotCall());
+ rli.write();
+ rli.close();
+ }
 });
 
 // Ensure that the _wordLeft method works even for large input