Adjust tests

Author: DanielBadura

baseline.xml

@@ -159,11 +159,6 @@
       <code><![CDATA[$dateTimeType->convertToPHPValue($data['recorded_on'], $platform)]]></code>
     </MixedArgument>
   </file>
-  <file src="src/Store/InMemoryStore.php">
-    <MixedPropertyTypeCoercion>
-      <code><![CDATA[$this->messages]]></code>
-    </MixedPropertyTypeCoercion>
-  </file>
   <file src="src/Store/StreamDoctrineDbalStore.php">
     <DeprecatedMethod>
       <code><![CDATA[setPrimaryKey]]></code>

src/Store/InMemoryStore.php

@@ -38,6 +38,7 @@
 
 final class InMemoryStore implements StreamStore
 {
+    /** @var array<0|positive-int, Message> */
     private array $messages = [];
 
     /** @param list<Message> $messages */

tests/Unit/Store/InMemoryStoreTest.php

@@ -18,6 +18,7 @@
 use Patchlevel\EventSourcing\Store\Criteria\FromPlayheadCriterion;
 use Patchlevel\EventSourcing\Store\Criteria\StreamCriterion;
 use Patchlevel\EventSourcing\Store\Criteria\ToIndexCriterion;
+use Patchlevel\EventSourcing\Store\Header\IndexHeader;
 use Patchlevel\EventSourcing\Store\Header\PlayheadHeader;
 use Patchlevel\EventSourcing\Store\Header\StreamNameHeader;
 use Patchlevel\EventSourcing\Store\InMemoryStore;
@@ -166,7 +167,20 @@ public function testLoadFromIndex(): void
 
         $messages = iterator_to_array($stream);
 
-        self::assertSame([$message3, $message4], $messages);
+        self::assertCount(2, $messages);
+        self::assertSame(
+            $message3->header(PlayheadHeader::class)->playhead,
+            $messages[0]->header(PlayheadHeader::class)->playhead,
+        );
+        self::assertSame(
+            3,
+            $messages[0]->header(IndexHeader::class)->index,
+        );
+        self::assertFalse($message4->hasHeader(PlayheadHeader::class));
+        self::assertSame(
+            4,
+            $messages[1]->header(IndexHeader::class)->index,
+        );
     }
 
     public function testLoadToIndex(): void
@@ -186,7 +200,23 @@ public function testLoadToIndex(): void
 
         $messages = iterator_to_array($stream);
 
-        self::assertSame([$message1, $message2], $messages);
+        self::assertCount(2, $messages);
+        self::assertSame(
+            $message1->header(AggregateHeader::class)->playhead,
+            $messages[0]->header(AggregateHeader::class)->playhead,
+        );
+        self::assertSame(
+            1,
+            $messages[0]->header(IndexHeader::class)->index,
+        );
+        self::assertSame(
+            $message2->header(AggregateHeader::class)->playhead,
+            $messages[1]->header(AggregateHeader::class)->playhead,
+        );
+        self::assertSame(
+            2,
+            $messages[1]->header(IndexHeader::class)->index,
+        );
     }
 
     public function testLoadByStreamNameWithLikeAll(): void