小编Saa*_*ina的帖子

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 \":\"无法将'java.lang.String'类型的值转换为必需类型'java.lang.Double';

以下是我的测试用例:

@Test
public void validates_all_parameters_are_set() throws Exception {
    ResponseEntity<String> 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.