Rename test file/class to make Phabricator understand PHPUnit test results/coverage.

Also try to modify tested code to confirm, that related tests would fail.

Let's implement this the other way around (sender does type casting, but recipient throws an exception on error on any PHP version):

Fixed the filesize(): stat failed for error when uploading file larger, than 1MB.

In D529#10934, @erik wrote:

Added tests for Core and Custom modules -

unknown_option_tests_v2.patch72 KBDownload

Added tests for "core" and "custom" modules.

Reclassified some tests from Unit to Functional.

Renamed the "kOptionsFormatter" class test for Phabricator to be able to generate coverage report from it.

Found these problems and fixed them (related to tests in the patch):

Added more unit tests (original version created by Erik).

1. I've noticed, that the same issue happens also with coupi and api units of the In-Commerce. Please expand the Differential Revision code/test plan to cover them as well.
2. I've noticed, that you're testing, that notice is gone, but not testing that item adding code still works. Please test that as well.
3. I've also renamed the task. Please rename your changelist in the PhpStorm to avoid accidental Differential Revision rename on patch update.

In D529#10861, @erik wrote:

I do not understand relation between test plan and proposed automation logic.

1. As I understand from test plan, not only required fields should be tested, but fields with specific formatter.
2. As I understand from test plan, should test not only create, but also update.
3. Each unit may be specific, may have dependencies to another units, so proposed automation logic seems is not helpful.

In D529#10843, @erik wrote:

Made partial testing. In the u and addr units, on State field Detected unknown_option validation error. As discussed in Zoom, started writing code for automated unit test to check create/update all units with kOptionsFormatter.