created introspection test

Author: chrissm79

tests/IntrospectionTest.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace Nuwave\Relay\Tests;
+
+class IntrospectionTest extends BaseTest
+{
+    /**
+     * @test
+     */
+    public function itAcceptsIntrospectionRequestForNodeInterface()
+    {
+        $query = '{
+          __type(name: "Node") {
+            name
+            kind
+            fields {
+              name
+              type {
+                kind
+                ofType {
+                  name
+                  kind
+                }
+              }
+            }
+          }
+        }';
+        $expected = [
+            '__type' => [
+                'name' => 'Node',
+                'kind' => 'INTERFACE',
+                'fields' => [[
+                    'name' => 'id',
+                    'type' => [
+                        'kind' => 'NON_NULL',
+                        'ofType' => [
+                            'name' => 'ID',
+                            'kind' => 'SCALAR'
+                        ]
+                    ]
+                ]]
+            ]
+        ];
+
+        $response = $this->graphqlResponse($query);
+
+        $this->assertEquals($expected, $response['data']);
+    }
+
+    /**
+     * @test
+     */
+    public function itAcceptsIntrospectionRequestForNodeQuery()
+    {
+        $query = '{
+          __schema {
+            queryType {
+              fields {
+                name
+                type {
+                  name
+                  kind
+                }
+                args {
+                  name
+                  type {
+                    kind
+                    ofType {
+                      name
+                      kind
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }';
+        $response = $this->graphqlResponse($query);
+        $fields = array_get($response, 'data.__schema.queryType.fields');
+
+        $nodeField = array_first($fields, function ($key, $value) {
+            return $value['name'] == 'node';
+        });
+
+        $this->assertEquals([
+            'name' => 'node',
+            'type' => [
+                'name' => 'Node',
+                'kind' => 'INTERFACE'
+            ],
+            'args' => [[
+                'name' => 'id',
+                'type' => [
+                    'kind' => 'NON_NULL',
+                    'ofType' => [
+                        'name' => 'ID',
+                        'kind' => 'SCALAR'
+                    ]
+                ]
+            ]]
+        ], $nodeField);
+    }
+}