Trigger warning when calling CodecCursor::setTypeMap

src/Model/CodecCursor.php

@@ -27,6 +27,10 @@
 
 use function assert;
 use function iterator_to_array;
+use function sprintf;
+use function trigger_error;
+
+use const E_USER_WARNING;
 
 /**
  * @template TValue of object
@@ -104,6 +108,7 @@ public function rewind(): void
  public function setTypeMap(array $typemap): void
  {
  // Not supported
+ trigger_error(sprintf('Discarding type map for %s', __METHOD__), E_USER_WARNING);
  }
 
  /** @return array<int, TValue> */

tests/Model/CodecCursorFunctionalTest.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace MongoDB\Tests\Model;
+
+use MongoDB\BSON\Document;
+use MongoDB\Codec\DocumentCodec;
+use MongoDB\Model\CodecCursor;
+use MongoDB\Tests\FunctionalTestCase;
+
+class CodecCursorFunctionalTest extends FunctionalTestCase
+{
+ public function setUp(): void
+ {
+ parent::setUp();
+
+ $this->dropCollection($this->getDatabaseName(), $this->getCollectionName());
+ }
+
+ public function testSetTypeMap(): void
+ {
+ $collection = self::createTestClient()->selectCollection($this->getDatabaseName(), $this->getCollectionName());
+ $cursor = $collection->find();
+
+ $codecCursor = CodecCursor::fromCursor($cursor, $this->createCodec());
+
+ $this->expectWarning();
+ $this->expectWarningMessage('Discarding type map for MongoDB\Model\CodecCursor::setTypeMap');
+
+ $codecCursor->setTypeMap(['root' => 'array']);
+ }
+
+ private function createCodec(): DocumentCodec
+ {
+ return new class implements DocumentCodec {
+ public function canDecode($value): bool
+ {
+ return false;
+ }
+
+ public function canEncode($value): bool
+ {
+ return false;
+ }
+
+ public function decode($value): object
+ {
+ return (object) [];
+ }
+
+ public function decodeIfSupported($value): object
+ {
+ return (object) [];
+ }
+
+ public function encode($value): Document
+ {
+ return Document::fromPHP([]);
+ }
+
+ public function encodeIfSupported($value): Document
+ {
+ return Document::fromPHP([]);
+ }
+ };
+ }
+}