Fix issue with kept deprecation reason

src/FieldsBuilder.php

@@ -689,6 +689,7 @@ private function getQueryFieldsFromSourceFields(
                 $docBlockComment = rtrim($docBlockObj->getSummary() . "\n" . $docBlockObj->getDescription()->render());
 
                 $deprecated = $docBlockObj->getTagsByName('deprecated');
+                $deprecationReason = null;
                 if (count($deprecated) >= 1) {
                     $deprecationReason = trim((string) $deprecated[0]);
                 }

tests/FieldsBuilderTest.php

@@ -37,11 +37,13 @@
 use TheCodingMachine\GraphQLite\Fixtures\TestControllerWithParamDateTime;
 use TheCodingMachine\GraphQLite\Fixtures\TestControllerWithReturnDateTime;
 use TheCodingMachine\GraphQLite\Fixtures\TestControllerWithUnionInputParam;
+use TheCodingMachine\GraphQLite\Fixtures\TestDeprecatedField;
 use TheCodingMachine\GraphQLite\Fixtures\TestDoubleReturnTag;
 use TheCodingMachine\GraphQLite\Fixtures\TestEnum;
 use TheCodingMachine\GraphQLite\Fixtures\TestFieldBadInputType;
 use TheCodingMachine\GraphQLite\Fixtures\TestFieldBadOutputType;
 use TheCodingMachine\GraphQLite\Fixtures\TestObject;
+use TheCodingMachine\GraphQLite\Fixtures\TestObjectWithDeprecatedField;
 use TheCodingMachine\GraphQLite\Fixtures\TestSelfType;
 use TheCodingMachine\GraphQLite\Fixtures\TestSourceFieldBadOutputType;
 use TheCodingMachine\GraphQLite\Fixtures\TestSourceFieldBadOutputType2;
@@ -922,4 +924,20 @@ public function testSourceNameInSourceAndMagicFields(): void
         $result = $resolve($source, [], null, $this->createMock(ResolveInfo::class));
         $this->assertSame('bar value', $result);
     }
+
+    public function testDeprecationInDocblock(): void
+    {
+        $fieldsBuilder = $this->buildFieldsBuilder();
+        $inputFields = $fieldsBuilder->getFields(
+            new TestDeprecatedField(),
+            'Test',
+        );
+
+        $this->assertCount(2, $inputFields);
+
+        $this->assertEquals('this is deprecated', $inputFields['deprecatedField']->deprecationReason);
+        $this->assertTrue( $inputFields['deprecatedField']->isDeprecated());
+        $this->assertNull( $inputFields['name']->deprecationReason);
+        $this->assertFalse( $inputFields['name']->isDeprecated());
+    }
 }

tests/Fixtures/TestDeprecatedField.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TheCodingMachine\GraphQLite\Fixtures;
+
+use TheCodingMachine\GraphQLite\Annotations\SourceField;
+use TheCodingMachine\GraphQLite\Annotations\Type;
+
+#[Type(class: TestObjectWithDeprecatedField::class)]
+#[SourceField(name: 'deprecatedField')]
+#[SourceField(name: 'name')]
+class TestDeprecatedField
+{
+
+}

tests/Fixtures/TestObjectWithDeprecatedField.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TheCodingMachine\GraphQLite\Fixtures;
+
+class TestObjectWithDeprecatedField
+{
+
+    /** @deprecated this is deprecated */
+    public function getDeprecatedField(): string
+    {
+        return 'deprecatedField';
+    }
+
+    public function getName(): string
+    {
+        return 'Foo';
+    }
+
+}