PHPLIB-638: Ensure writeConcernError is reported for findAndModify

Author: levon80999

tests/Operation/FindAndModifyFunctionalTest.php

@@ -3,6 +3,7 @@
 namespace MongoDB\Tests\Operation;
 
 use MongoDB\Driver\BulkWrite;
+use MongoDB\Driver\Exception\CommandException;
 use MongoDB\Driver\ReadPreference;
 use MongoDB\Driver\WriteConcern;
 use MongoDB\Exception\UnsupportedException;
@@ -92,6 +93,23 @@ public function testHintOptionAndUnacknowledgedWriteConcernUnsupportedClientSide
         $operation->execute($this->getPrimaryServer());
     }
 
+    public function testFindAndModifyReportedWriteConcernError(): void
+    {
+        try {
+            $operation = new FindAndModify(
+                $this->getDatabaseName(),
+                $this->getCollectionName(),
+                ['remove' => true, 'writeConcern' => new WriteConcern(50)]
+            );
+
+            $operation->execute($this->getPrimaryServer());
+        } catch (CommandException $e) {
+            $this->assertInstanceOf(CommandException::class, $e);
+            $this->assertStringContainsString('Write Concern error', $e->getMessage());
+            $this->assertSame(100, $e->getCode());
+        }
+    }
+
     public function testSessionOption(): void
     {
         (new CommandObserver())->observe(