Merge pull request #284 from digiaonline/improve-default-type-resolver

Small improvement for defaultTypeResolver

Author: q-hung

src/Execution/Executor.php

@@ -665,6 +665,10 @@ protected function defaultTypeResolver(
         ResolveInfo $info,
         AbstractTypeInterface $abstractType
     ) {
+        if (\is_array($value) && isset($value['__typename'])) {
+            return $value['__typename'];
+        }
+
         /** @var ObjectType[] $possibleTypes */
         $possibleTypes           = $info->getSchema()->getPossibleTypes($abstractType);
         $promisedIsTypeOfResults = [];

tests/Functional/Schema/BuildingTest.php

@@ -2,8 +2,8 @@
 
 namespace Digia\GraphQL\Test\Functional\Schema;
 
-use Digia\GraphQL\Test\TestCase;
 use Digia\GraphQL\Schema\Schema;
+use Digia\GraphQL\Test\TestCase;
 use function Digia\GraphQL\buildSchema;
 use function Digia\GraphQL\Test\readFileContents;
 

tests/Functional/Schema/SchemaBuilderTest.php

@@ -0,0 +1,158 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: hunguyen
+ * Date: 20/09/2018
+ * Time: 10.55
+ */
+
+namespace Digia\GraphQL\Test\Functional\Schema;
+
+
+use Digia\GraphQL\Test\TestCase;
+use function Digia\GraphQL\buildSchema;
+use function Digia\GraphQL\graphql;
+
+class SchemaBuilderTest extends TestCase
+{
+    /**
+     * @throws \Digia\GraphQL\Error\InvariantException
+     */
+    public function testSpecifyingInterfaceTypeUsingTypeNameMetaFieldDefinition()
+    {
+        $source = '
+           type Query {
+            characters: [Character]
+          }
+    
+          interface Character {
+            name: String!
+          }
+    
+          type Human implements Character {
+            name: String!
+            totalCredits: Int
+          }
+    
+          type Droid implements Character {
+            name: String!
+            primaryFunction: String
+          }
+      ';
+
+        /** @noinspection PhpUnhandledExceptionInspection */
+        $schema = buildSchema($source);
+
+        $query = '
+         {
+            characters {
+              name
+              ... on Human {
+                totalCredits
+              }
+              ... on Droid {
+                primaryFunction
+              }
+            }
+          }
+        ';
+
+        $rootValue = [
+            'characters' => [
+                [
+                    'name'         => 'Han Solo',
+                    'totalCredits' => 10,
+                    '__typename'   => 'Human',
+                ],
+                [
+                    'name'            => 'R2-D2',
+                    'primaryFunction' => 'Astromech',
+                    '__typename'      => 'Droid',
+                ],
+            ],
+        ];
+
+        $result = graphql($schema, $query, $rootValue);
+
+        $this->assertEquals([
+            'data' => [
+                'characters' => [
+                    [
+                        'name'         => 'Han Solo',
+                        'totalCredits' => 10,
+                    ],
+                    [
+                        'name'            => 'R2-D2',
+                        'primaryFunction' => 'Astromech',
+                    ],
+                ],
+            ],
+        ], $result);
+    }
+
+    /**
+     * @throws \Digia\GraphQL\Error\InvariantException
+     */
+    public function testSpecifyingUnionTypeUsingTypeNameMetaFieldDefinition()
+    {
+        $source = '
+          type Query {
+            fruits: [Fruit]
+          }
+    
+          union Fruit = Apple | Banana
+    
+          type Apple {
+            color: String
+          }
+    
+          type Banana {
+            length: Int
+          }
+      ';
+
+        /** @noinspection PhpUnhandledExceptionInspection */
+        $schema = buildSchema($source);
+
+        $query = '
+          {
+            fruits {
+              ... on Apple {
+                color
+              }
+              ... on Banana {
+                length
+              }
+            }
+          }
+        ';
+
+        $rootValue = [
+            'fruits' => [
+                [
+                    'color'      => 'green',
+                    '__typename' => 'Apple',
+                ],
+                [
+                    'length'     => 5,
+                    '__typename' => 'Banana',
+                ],
+            ],
+        ];
+
+        $result = graphql($schema, $query, $rootValue);
+
+        $this->assertEquals([
+            'data' => [
+                'fruits' => [
+                    [
+                        'color' => 'green',
+                    ],
+                    [
+                        'length' => 5,
+                    ],
+                ],
+            ],
+        ], $result);
+    }
+}