Details about deprecations, notices, and warnings are not displayed when the TestDox result printer is used

[sebastianbergmann]

Display deprecations, notices, and warnings in TestDox output when --display-deprecations (or displayDetailsOnTestsThatTriggerDeprecations="true"), --display-notices (or displayDetailsOnTestsThatTriggerNotices="true"), --display-warnings (or displayDetailsOnTestsThatTriggerWarnings="true") is used, respectively.

[sebastianbergmann]

PHPUnit 10 introduced a clear separation between the outcome (errored, failed, incomplete, skipped, or passed) of a test and the issues (considered risky, triggered a deprecation/notice/warning, etc.) of a test.

While a test does only have outcome, it may have >= 0 issues. I do not think that the information about issues can be displayed in TestDox format in a useful way. I therefore propose that we only consider test outcome for the TestDox format and display details about test issues by re-using the default result printer.

Consider the following example:

ExampleTest.php

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class ExampleTest extends TestCase
{
    public function testNoIssues(): void
    {
        $this->assertTrue(true);
    }

    public function testFailure(): void
    {
        $this->assertTrue(false);
    }

    public function testDeprecation(): void
    {
        trigger_error('deprecation', E_USER_DEPRECATED);

        $this->assertTrue(true);
    }
}

Current Behaviour

$ phpunit --display-deprecations --display-notices --display-warnings --testdox ExampleTest.php
PHPUnit 10.5.5-5-gd2a23b7cb9 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.3.1

.FD                                                                 3 / 3 (100%)

Time: 00:00.017, Memory: 4.00 MB

Example
 ✔ No issues
 ✘ Failure
   │
   │ Failed asserting that false is true.
   │
   │ /home/sb/ExampleTest.php:13
   │
 ✔ Deprecation

FAILURES!
Tests: 3, Assertions: 3, Failures: 1, Deprecations: 1.

Proposed Behaviour

$ phpunit --display-deprecations --display-notices --display-warnings --testdox ExampleTest.php
PHPUnit 10.5.5-5-gd2a23b7cb9 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.3.1

.FD                                                                 3 / 3 (100%)

Time: 00:00.017, Memory: 4.00 MB

Example
 ✔ No issues
 ✘ Failure
   │
   │ Failed asserting that false is true.
   │
   │ /home/sb/ExampleTest.php:13
   │
 ✔ Deprecation

1 test triggered 1 deprecation:

1) /home/sb/ExampleTest.php:18
deprecation

Triggered by:

* ExampleTest::testDeprecation
  /home/sb/ExampleTest.php:16

FAILURES!
Tests: 3, Assertions: 3, Failures: 1, Deprecations: 1.

I will implement the above ASAP for PHPUnit 10.5.