http4s：实际值和预期值有什么区别？

Question

版本：

http4s: 0.18.1
规格 2：4.0.0

我正在使用 http4s 并为路由器编写单元测试，但是关于 headers 断言的文档很少。

执行下面的代码时，可以编译，但是编译失败。

代码：

import cats.effect.IO
import org.http4s._
import org.http4s.dsl.io._
import org.http4s.headers._
import org.http4s.testing.Http4sMatchers
import org.specs2.mutable.Specification

class RedirectSpec extends Specification with Http4sMatchers {
  "testing" >> {
    val response: IO[Response[IO]] = Found(Location(Uri.unsafeFromString("")))
    response must returnStatus(Found)
    response must returnValue(
      haveHeaders(
        Headers(
          `Content-Length`.zero,
          Location(Uri.unsafeFromString(""))
        )
      )
    )
  }
}

输出：

$  sbt "testOnly RedirectSpec"
...
[info] RedirectSpec
[error] x testing
[error]  the headers 'Headers(Content-Length: 0, Location: )' is not the same as Headers(Content-Length: 0, Location: ) (RedirectSpec.scala:13)
[info] Total for specification RedirectSpec
[info] Finished in 655 ms
[info] 1 example, 1 failure, 0 error
[error] Failed: Total 1, Failed 1, Errors 0, Passed 0
[error] Failed tests:
[error]         RedirectSpec
[error] (test:testOnly) sbt.TestsFailedException: Tests unsuccessful

实际值和预期值有什么区别？如果错了，请告诉我如何断言headers。

Answer 1

这几乎可以肯定是一个错误，因为 one of Http4s's own tests does something similar and fails when I run it with Http4sMatchers with a similar error. I've reported a bug。

http4s：实际值和预期值有什么区别？

http4s: What is difference between actual and expected value?

scala

testing

http4s