kotlintest中beforeEach和beforeClass怎么写

Question

给出的是 kotlin-test github docs 中的示例，但我在这里看不到 beforeEach 或 beforeClass 概念。我想明白，

如何在每次测试前执行一次code/method
如何在每次测试前执行一次 code/method class

class MyTests : StringSpec({
  "length should return size of string" {
    "hello".length shouldBe 5
  }
  "startsWith should test for a prefix" {
    "world" should startWith("wor")
  }
})

Answer 1

在 github 文档和 kotlin-test 框架源代码中做了一些研究后，下面是编写 beforeTest、beforeSpec、afterTest、afterSpec 的代码

class MyTest : StringSpec({

    "test should run " {
        "Hello".shouldHaveLength(4)
    }

    "test2 should run " {
        "Hello World".shouldHaveLength(10)
    }
}) {
    override fun beforeTest(description: Description) {
        super.beforeTest(description)
        println("Before every spec/test case")
    }

    override fun beforeSpec(description: Description, spec: Spec) {
        super.beforeSpec(description, this)
        println("Before every test suite")
    }

    override fun afterTest(description: Description, result: TestResult) {
        super.afterTest(description, result)
        println("After every spec/test case")
    }

    override fun afterSpec(description: Description, spec: Spec) {
        super.afterSpec(description, spec)
        println("After every test suite")
    }
}

这看起来不太优雅，如果有什么方法可以让它变得优雅，请post它。

Answer 2

与您自己的回答@JTeam 非常相似，但使用 init {} 构造函数块来声明您的测试，然后您可以直接在 class.

中覆盖方法

class MyTest : StringSpec() {

  override fun beforeTest(description: Description) {
    super.beforeTest(description)
    println("Before every spec/test case")
  }

  override fun beforeSpec(description: Description, spec: Spec) {
    super.beforeSpec(description, this)
    println("Before every test suite")
  }

  override fun afterTest(description: Description, result: TestResult) {
    super.afterTest(description, result)
    println("After every spec/test case")
  }

  override fun afterSpec(description: Description, spec: Spec) {
    super.afterSpec(description, spec)
    println("After every test suite")
  }

  init {
    "test should run " {
      "Hello".shouldHaveLength(4)
    }

    "test2 should run " {
      "Hello World".shouldHaveLength(10)
    }
  }
}

Answer 3

在 Kotest 的较新版本中（我认为从 4.0.0 开始）TestCofiguration 上有生命周期函数，不再需要 init 块：

import io.kotest.core.spec.style.StringSpec
import io.kotest.matchers.string.shouldHaveLength

class MyTest : StringSpec({
    beforeTest {
        println("Before every spec/test case")
    }

    beforeSpec {
        println("Before every test suite")
    }

    afterTest {
        println("After every spec/test case")
    }

    afterSpec {
        println("After every test suite")
    }

    "test 1 " {
        println("run test 1")
        "Hello" shouldHaveLength 4
    }

    "test 2 " {
        println("run test 2")
        "Hello World" shouldHaveLength 10
    }
})

More info

kotlintest中beforeEach和beforeClass怎么写

How to write beforeEach and beforeClass in kotlintest

kotlin

kotlintest

kotest