assertInstanceOf(BuilderChainable::class, $result); } public function testOpSpecialOrder() { $this->expectException(\InvalidArgumentException::class); $this->expectExceptionCode(268546002); $result = $this->opSpecialOrder('errororderid', 2); } public function testDomesticRefunds() { $result = $this->domesticRefunds('20250904133148020905', '20250904133148020905', 0.01); $this->assertObjectHasProperty('amount', $result); dump($result); } public function testQueryByOutTradeNo() { $result = $this->queryByOutTradeNo('20250904133148020905'); dump($result); } public function testQueryRefund() { $result = $this->queryRefund('20250909135117037302'); dump($result); } public function testQueryTransferBill() { $result = $this->queryTransferBill('20251105151948049869'); dump($result); } }