public function testNegativeWeigth(): void {
$this->expectExceptionMessage("Negative weight detected");
$sales = new Sales;
$sales->getCost("ABC", "123", -1234);
}$sales->getCost("ABC", "123", -1234); 的話,只要有一個跳 exception,assertion 就成立了,但我要每一個都跳 exception 才可以