Ensure command, query and event names are unique

src/EventEngine.php

@@ -428,7 +428,16 @@ public function enableMetadataForwarding(): self
     public function registerCommand(string $commandName, PayloadSchema $schema): self
     {
         $this->assertNotInitialized(__METHOD__);
-        if (\array_key_exists($commandName, $this->commandMap)) {
+
+        if ($this->isKnownQuery($commandName)) {
+            throw new RuntimeException("Query with name $commandName was already registered.");
+        }
+
+        if ($this->isKnownEvent($commandName)) {
+            throw new RuntimeException("Event with name $commandName was already registered.");
+        }
+
+        if ($this->isKnownCommand($commandName)) {
             throw new RuntimeException("Command $commandName was already registered.");
         }
 
@@ -441,7 +450,15 @@ public function registerEvent(string $eventName, PayloadSchema $schema): self
     {
         $this->assertNotInitialized(__METHOD__);
 
-        if (\array_key_exists($eventName, $this->eventMap)) {
+        if ($this->isKnownCommand($eventName)) {
+            throw new RuntimeException("Command with name $eventName was already registered.");
+        }
+
+        if ($this->isKnownQuery($eventName)) {
+            throw new RuntimeException("Query with name $eventName was already registered.");
+        }
+
+        if ($this->isKnownEvent($eventName)) {
             throw new RuntimeException("Event $eventName was already registered.");
         }
 
@@ -461,6 +478,14 @@ public function registerQuery(string $queryName, PayloadSchema $payloadSchema =
             $payloadSchema = $this->schema()->emptyPayloadSchema();
         }
 
+        if ($this->isKnownCommand($queryName)) {
+            throw new RuntimeException("Command with name $queryName was already registered.");
+        }
+
+        if ($this->isKnownEvent($queryName)) {
+            throw new RuntimeException("Event with name $queryName was already registered.");
+        }
+
         if ($this->isKnownQuery($queryName)) {
             throw new RuntimeException("Query $queryName was already registered");
         }

tests/EventEngineUniqueNameTest.php

@@ -0,0 +1,116 @@
+<?php
+/**
+ * This file is part of event-engine/php-engine.
+ * (c) 2018-2019 prooph software GmbH <contact@prooph.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace EventEngineTest;
+
+use EventEngine\DocumentStore\DocumentStore;
+use EventEngine\DocumentStore\InMemoryDocumentStore;
+use EventEngine\EventEngine;
+use EventEngine\EventStore\EventStore;
+use EventEngine\JsonSchema\JsonSchema;
+use EventEngine\JsonSchema\JustinRainbowJsonSchema;
+use EventEngine\Logger\DevNull;
+use EventEngine\Logger\SimpleMessageEngine;
+use EventEngine\Messaging\Message;
+use EventEngine\Persistence\InMemoryConnection;
+use EventEngine\Prooph\V7\EventStore\InMemoryEventStore;
+use EventEngine\Prooph\V7\EventStore\ProophEventStore;
+use EventEngine\Runtime\PrototypingFlavour;
+use EventEngine\Schema\Schema;
+use Psr\Container\ContainerInterface;
+use Ramsey\Uuid\Uuid;
+
+class EventEngineUniqueNameTest extends BasicTestCase
+{
+    const CMD_REGISTER_USER = 'RegisterUser';
+    const EV_USER_REGISTERED = 'UserHasRegistered';
+    const QY_LIST_USERS = 'ListUsers';
+    /**
+     * @var EventEngine
+     */
+    private $eventEngine;
+
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $this->eventEngine = new EventEngine(new JustinRainbowJsonSchema());
+
+        $this->eventEngine->registerCommand(self::CMD_REGISTER_USER, JsonSchema::object([]));
+        $this->eventEngine->registerEvent(self::EV_USER_REGISTERED, JsonSchema::object([]));
+        $this->eventEngine->registerQuery(self::QY_LIST_USERS, JsonSchema::object([]));
+    }
+    /**
+     * @test
+     */
+    public function it_does_not_allow_to_register_command_as_event()
+    {
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessageRegExp('/Command with name/');
+
+        $this->eventEngine->registerEvent(self::CMD_REGISTER_USER, JsonSchema::object([]));
+    }
+
+    /**
+     * @test
+     */
+    public function it_does_not_allow_to_register_command_as_query()
+    {
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessageRegExp('/Command with name/');
+
+        $this->eventEngine->registerQuery(self::CMD_REGISTER_USER, JsonSchema::object([]));
+    }
+
+    /**
+     * @test
+     */
+    public function it_does_not_allow_to_register_event_as_command()
+    {
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessageRegExp('/Event with name/');
+
+        $this->eventEngine->registerCommand(self::EV_USER_REGISTERED, JsonSchema::object([]));
+    }
+
+    /**
+     * @test
+     */
+    public function it_does_not_allow_to_register_event_as_query()
+    {
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessageRegExp('/Event with name/');
+
+        $this->eventEngine->registerQuery(self::EV_USER_REGISTERED, JsonSchema::object([]));
+    }
+
+    /**
+     * @test
+     */
+    public function it_does_not_allow_to_register_query_as_command()
+    {
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessageRegExp('/Query with name/');
+
+        $this->eventEngine->registerCommand(self::QY_LIST_USERS, JsonSchema::object([]));
+    }
+
+    /**
+     * @test
+     */
+    public function it_does_not_allow_to_register_query_as_event()
+    {
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessageRegExp('/Query with name/');
+
+        $this->eventEngine->registerEvent(self::QY_LIST_USERS, JsonSchema::object([]));
+    }
+}