我有一个计算器服务,从用户获取操作类型num1和num2.我需要验证用户是否实际输入了这些值,而不是将其留空.

@RequestMapping(value = "/calculate")

@ResponseBody

public CalculationResult calculate(@RequestParam(name = "op") String operation, @RequestParam(name = "num1") Double num1, @RequestParam(name = "num2") Double num2) {

System.out.print("Operation:" + operation);

Double calculate = calculatorService.calculate(operation, num1, num2);

return new CalculationResult(calculate);

}

我有一个集成测试,我需要传递,因为它当前失败并出现错误：

{\”timestamp\”:1488875777084,\”status\”:400,\”error\”:\”Bad

Request\”,\”exception\”:\”org.springframework.web.method.annotation.MethodArgumentTypeMismatchException\”,\”message\”:\”Failed

to convert value of type ‘java.lang.String’ to required type

‘java.lang.Double’;

以下是我的测试用例：

@Test

public void validates_all_parameters_are_set() throws Exception {

ResponseEntity response = template.getForEntity( "/calculate?op=&num1=&num2=",

String.class);

assertThat(response.getStatusCode(), equalTo(HttpStatus.BAD_REQUEST));

assertThat(response.getBody(), equalTo("{\"error\":\"At least one parameter is invalid or not supplied\"}"));

}

我不知道如何验证这一点.