add debug command

Makefile

@@ -5,11 +5,11 @@ vendor: composer.lock
 	composer install
 
 .PHONY: phpcs-check
-phpcs-check: vendor                                                             ## run phpcs
+cs-check: vendor                                                                ## run phpcs
 	vendor/bin/phpcs
 
 .PHONY: phpcs-fix
-cs: vendor                                                               ## run phpcs fixer
+cs: vendor                                                                      ## run phpcs fixer
 	vendor/bin/phpcbf
 
 .PHONY: phpstan

phpcs.xml.dist

@@ -16,6 +16,9 @@
         <exclude name="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingTraversableTypeHintSpecification" />
         <exclude name="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingTraversableTypeHintSpecification" />
         <exclude name="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingTraversableTypeHintSpecification" />
+        <exclude name="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingAnyTypeHint">
+            <exclude-pattern>src/Console/Command</exclude-pattern>
+        </exclude>
         <exclude name="Generic.Files.LineLength.TooLong"/>
     </rule>
 </ruleset>

src/Console/Command/DebugCommand.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Patchlevel\EventSourcing\Console\Command;
+
+use Patchlevel\EventSourcing\Console\OutputStyle;
+use Patchlevel\EventSourcing\Metadata\AggregateRoot\AggregateRootRegistry;
+use Patchlevel\EventSourcing\Metadata\Event\EventRegistry;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+use function array_keys;
+use function array_map;
+use function array_values;
+
+final class DebugCommand extends Command
+{
+    protected static $defaultName = 'event-sourcing:debug';
+    protected static $defaultDescription = 'show event sourcing debug information';
+
+    public function __construct(
+        private readonly AggregateRootRegistry $aggregateRootRegistry,
+        private readonly EventRegistry $eventRegistry
+    ) {
+        parent::__construct();
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $console = new OutputStyle($input, $output);
+
+        $this->showAggregates($console);
+        $this->showEvents($console);
+
+        return 0;
+    }
+
+    private function showAggregates(OutputStyle $console): void
+    {
+        $console->title('Aggregates');
+
+        $aggregates = $this->aggregateRootRegistry->aggregateClasses();
+
+        $console->table(
+            ['name', 'class'],
+            array_map(null, array_keys($aggregates), array_values($aggregates))
+        );
+    }
+
+    private function showEvents(OutputStyle $console): void
+    {
+        $console->title('Events');
+
+        $events = $this->eventRegistry->eventClasses();
+
+        $console->table(
+            ['name', 'class'],
+            array_map(null, array_keys($events), array_values($events))
+        );
+    }
+}

tests/Unit/Console/Command/DebugCommandTest.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Patchlevel\EventSourcing\Tests\Unit\Console\Command;
+
+use Patchlevel\EventSourcing\Console\Command\DebugCommand;
+use Patchlevel\EventSourcing\Metadata\AggregateRoot\AggregateRootRegistry;
+use Patchlevel\EventSourcing\Metadata\Event\EventRegistry;
+use Patchlevel\EventSourcing\Tests\Unit\Fixture\Profile;
+use Patchlevel\EventSourcing\Tests\Unit\Fixture\ProfileCreated;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\BufferedOutput;
+
+/** @covers \Patchlevel\EventSourcing\Console\Command\DebugCommand */
+final class DebugCommandTest extends TestCase
+{
+    public function testSuccessful(): void
+    {
+        $command = new DebugCommand(
+            new AggregateRootRegistry(['profile' => Profile::class]),
+            new EventRegistry(['profile.created' => ProfileCreated::class])
+        );
+
+        $input = new ArrayInput([]);
+        $output = new BufferedOutput();
+
+        $exitCode = $command->run($input, $output);
+
+        self::assertSame(0, $exitCode);
+
+        $content = $output->fetch();
+
+        self::assertStringContainsString('profile', $content);
+        self::assertStringContainsString(Profile::class, $content);
+        self::assertStringContainsString('profile.created', $content);
+        self::assertStringContainsString(ProfileCreated::class, $content);
+    }
+}