如何用kotlintest编写beforeEach和beforeClass

Question

给出了kotlin-测试github文档的例子，但我在这里没有看到beforeEach或beforeClass的概念。我想明白，

• 如何在每次测试之前执行一次代码/方法
• 如何在每个测试类之前执行一次代码/方法

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

非常类似于您自己的答案@JTeam，但是使用init {}构造函数块声明测试，然后可以在类中直接覆盖方法。

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 2

在较新版本的Kotest (我认为从4.0.0开始)中，TestCofiguration上有lifecylce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
    }
})

更多信息

Answer 3

在github文档和kotlin-test框架源代码中做了一些研究之后，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")
    }
}

这看起来不雅致，如果有任何方法可以使它优雅，请张贴它。