java - 放心 float 负零

Question

我想用 Rest Assured 测试我的休息服务，但当服务返回负零值时我的测试失败。

放心测试:

    String methodName="multiply";
    float[] operands = {1f,-2.5f,0};
    float result = operands[0] * operands[1] * operands[2];
    Response response = given().
            pathParam("a",operands[0]).
            pathParam("b",operands[1]).
            pathParam("c",operands[2]).
            contentType(JSON).
            log().ifValidationFails().
        when().
            get("/"+methodName+"/{a}/{b}/{c}").
        then().
            assertThat().statusCode(200).
            body("result",equalTo(result));

错误:

java.lang.AssertionError: JSON path result doesn't match.
Expected: <-0.0F>
  Actual: 0.0

结果 json:

{"result":-0.0}

为什么我的 rest 服务返回负零值时测试失败？

Answer 1

我发现最好配置 REST Assured 以将所有 Json 数字返回为 BigDecimal，然后使用 hamcrest closeTo 匹配器。

String methodName="multiply";
double[] operands = {1,-2.5,0};
double result = operands[0] * operands[1] * operands[2];
Response response = given().
        config(RestAssured.config().jsonConfig(jsonConfig().numberReturnType(BIG_DECIMAL))).
        pathParam("a",operands[0]).
        pathParam("b",operands[1]).
        pathParam("c",operands[2]).
        contentType(JSON).
        log().ifValidationFails().
    when().
        get("/"+methodName+"/{a}/{b}/{c}").
    then().
        assertThat().statusCode(200).
        log().ifValidationFails().
        body("result",closeTo(BigDecimal.valueOf(result),new BigDecimal("1E-20")));