wp-graphql-woocommerce/tests/wpunit/IntrospectionQueryTest.php

<?php

class IntrospectionQueryTest extends \Codeception\TestCase\WPTestCase
{

    public function setUp() {
        // before
        parent::setUp();

        // your set up methods here
    }

    public function tearDown() {
        // your tear down methods here

        // then
        parent::tearDown();
    }

    // Validate schema.
    public function testSchema() {
        try {
            $request = new \WPGraphQL\Request();
            $request->schema->assertValid();

            // Assert true upon success.
            $this->assertTrue( true );
        } catch (\GraphQL\Error\InvariantViolation $e) {
            // use --debug flag to view.
            codecept_debug( $e->getMessage() );
            
            // Fail upon throwing
            $this->assertTrue( false );
        }
    }

    // Test introspection query.
    public function testIntrospectionQuery() {
        $query = '
            query IntrospectionQuery {
                __schema {
                    queryType { name }
                    mutationType { name }
                    subscriptionType { name }
                    types {
                        ...FullType
                    }
                    directives {
                        name
                        description
                        locations
                        args {
                            ...InputValue
                        }
                    }
                }
            }
            fragment FullType on __Type {
                kind
                name
                description
                fields(includeDeprecated: true) {
                    name
                    description
                    args {
                        ...InputValue
                    }
                    type {
                        ...TypeRef
                    }
                        isDeprecated
                        deprecationReason
                    }
                    inputFields {
                        ...InputValue
                    }
                    interfaces {
                        ...TypeRef
                    }
                    enumValues(includeDeprecated: true) {
                    name
                    description
                    isDeprecated
                    deprecationReason
                }
                possibleTypes {
                    ...TypeRef
                }
            }
            fragment InputValue on __InputValue {
                name
                description
                type { ...TypeRef }
                defaultValue
            }
            fragment TypeRef on __Type {
                kind
                name
                ofType {
                    kind
                    name
                    ofType {
                        kind
                        name
                        ofType {
                            kind
                            name
                            ofType {
                                kind
                                name
                                ofType {
                                    kind
                                    name
                                    ofType {
                                        kind
                                        name
                                        ofType {
                                            kind
                                            name
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        ';

        $results = graphql( array( 'query' => $query ) );

        $this->assertArrayNotHasKey('errors', $results );
    }
}