fix: make:test requires 3 inputs after entering an empty class name

[paulbalandan]

Description
Ref: #9635 (review)

To verify the bug, try running make:test with no argument. On the next prompt, input the desired class. It will prompt again for another try. Try again for 2 more times.

$ php spark make:testCodeIgniter v4.6.1 Command Line Tool - Server Time: 2025-07-15 18:22:09 UTC+00:00Test class name : Foo/BarTest class name : Foo/BarTest class name : Foo/BarFile created: ROOTPATH/tests/Foo/BarTest.php

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[michalsn]

Looks great!

[datamweb]

LGTM! Thanks.