Hamcrest匹配器比较JSON的双值

我正在使用Hamcrest CoreMatcher类作为spring-test集成测试的一部分.我的JSON看起来像:

{"data":[{"distanceInMiles":4,"id":"f97236ba-f4ef-4...

我的集成测试看起来像:

double miles = 4.0
Activity a = new BasicActivity(miles);
this.activityManager.add(a); // A mock activity manager (in-memory)
...
this.mockMvc.perform(get("/").accept("application/json"))
    .andExpect(jsonPath("$.data[0].distanceInMiles", is(miles)))

但是,断言失败了:

java.lang.AssertionError: JSON path "$.data[0].distanceInMiles"
Expected: is <4.0>
     but: was <4>
    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)

我知道这里有一个单独的IsCloseTo匹配器:http://hamcrest.org/JavaHamcrest/javadoc/1.3/org/hamcrest/number/IsCloseTo.html,但是像这样使用它:

.andExpect(jsonPath("$.data[0].distanceInMiles", closeTo(miles, 0)))

导致一个奇怪的错误:

java.lang.AssertionError: JSON path "$.data[0].distanceInMiles"
Expected: a numeric value within <0.0> of <4.0>
     but: was a java.lang.Integer (<4>)
    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)

我希望避免包含某种错误 - 我希望返回的值完全正确4,我只是不关心包含多少尾随零.