public function testComplexityReducer() { $schema = new Schema(['query' => new ObjectType(['name' => 'RootQuery', 'fields' => ['me' => ['type' => new ObjectType(['name' => 'User', 'fields' => ['firstName' => ['type' => new StringType(), 'args' => ['shorten' => new BooleanType()], 'resolve' => function ($value, $args) { return empty($args['shorten']) ? $value['firstName'] : $value['firstName']; }], 'lastName' => new StringType(), 'code' => new StringType(), 'likes' => ['type' => new IntType(), 'cost' => 10, 'resolve' => function () { return 42; }]]]), 'cost' => function ($args, $context, $childCost) { $argsCost = isset($args['cost']) ? $args['cost'] : 1; return 1 + $argsCost * $childCost; }, 'resolve' => function ($value, $args) { $data = ['firstName' => 'John', 'code' => '007']; return $data; }, 'args' => ['cost' => ['type' => new IntType(), 'default' => 1]]]]])]); $processor = new Processor($schema); $processor->setMaxComplexity(10); $processor->processPayload('{ me { firstName, lastName } }'); $this->assertArrayNotHasKey('error', $processor->getResponseData()); $processor->processPayload('{ me { } }'); $this->assertEquals(['errors' => [['message' => 'Unexpected token "RBRACE"', 'locations' => [['line' => 1, 'column' => 10]]]]], $processor->getResponseData()); $processor->getExecutionContext()->clearErrors(); $processor->processPayload('{ me { firstName, likes } }'); $this->assertEquals(['errors' => [['message' => 'query exceeded max allowed complexity of 10']]], $processor->getResponseData()); $processor->getExecutionContext()->clearErrors(); // don't let complexity reducer affect query errors $processor->processPayload('{ me { badfield } }'); $this->assertArraySubset(['errors' => [['message' => 'Field "badfield" not found in type "User"']]], $processor->getResponseData()); $processor->getExecutionContext()->clearErrors(); foreach (range(1, 5) as $cost_multiplier) { $visitor = new MaxComplexityQueryVisitor(1000); // arbitrarily high cost $processor->processPayload("{ me (cost: {$cost_multiplier}) { firstName, lastName, code, likes } }", ['cost' => $cost_multiplier], [$visitor]); $expected = 1 + 13 * (1 + $cost_multiplier); $this->assertEquals($expected, $visitor->getMemo()); } // TODO, variables not yet supported /*$query = 'query costQuery ($cost: Int) { me (cost: $cost) { firstName, lastName, code, likes } }'; foreach (range(1,5) as $cost_multiplier) { $visitor = new \Youshido\GraphQL\Execution\Visitor\MaxComplexityQueryVisitor(1000); // arbitrarily high cost $processor->processPayload($query, ['cost' => $cost_multiplier], [$visitor]); $expected = 1 + 13 * (1 + $cost_multiplier); $this->assertEquals($expected, $visitor->getMemo()); }*/ }