Kotest 기본 작성법(Writing tests)

class MyFirstTestClass : FunSpec({

   test("my first test") {
      1 + 2 shouldBe 3
   }

})

import io.kotest.core.spec.style.StringSpec

class MyStringSpec : StringSpec({
    "This is a test" {
        // 테스트 코드 작성
    }
})

import io.kotest.core.spec.style.StringSpec

class MyStringSpec : StringSpec() {
    init {
        "This is a test" {
            // 테스트 코드 작성
        }
    }
}

class NestedTestExamples : DescribeSpec({

   describe("an outer test") {

      it("an inner test") {
        1 + 2 shouldBe 3
      }

      it("an inner test too!") {
        3 + 4 shouldBe 7
      }
   }

})

class DynamicTests : FunSpec({

    listOf(
      "sam",
      "pam",
      "tim",
    ).forEach {
       test("$it should be a three letter name") {
           it.shouldHaveLength(3)
       }
    }
})

class DynamicTests : FunSpec({

   test("sam should be a three letter name") {
      "sam".shouldHaveLength(3)
   }

   test("pam should be a three letter name") {
      "pam".shouldHaveLength(3)
   }

   test("tim should be a three letter name") {
     "tim".shouldHaveLength(3)
   }
})

class Callbacks : FunSpec({

   beforeEach {
      println("Hello from $it")
   }

   test("sam should be a three letter name") {
      "sam".shouldHaveLength(3)
   }

   afterEach {
      println("Goodbye from $it")
   }
})

val resetDatabase: BeforeTest = {
  // truncate all tables here
}

class ReusableCallbacks : FunSpec({

   beforeTest(resetDatabase)

   test("this test will have a sparkling clean database!") {
       // test logic here
   }
})

package com.devkuma.kotest.tutorial.assertions

import io.kotest.core.spec.style.FreeSpec
import io.kotest.matchers.collections.shouldContain
import io.kotest.matchers.collections.shouldContainAll
import io.kotest.matchers.collections.shouldContainExactly
import io.kotest.matchers.collections.shouldNotContain
import io.kotest.matchers.ints.shouldBeGreaterThan
import io.kotest.matchers.ints.shouldBeInRange
import io.kotest.matchers.ints.shouldBeLessThan
import io.kotest.matchers.shouldBe
import io.kotest.matchers.shouldNotBe
import io.kotest.matchers.string.shouldBeBlank
import io.kotest.matchers.string.shouldBeEqualIgnoringCase

class MatchersTest : FreeSpec({

    "Matchers" - {
        val number = 10
        "값이 기대한 값과 동일한지 확인한다." {
            number shouldBe 10
        }

        "값이 기대한 값과 다른지 확인한다." {
            number shouldNotBe 20
        }

        val blankString = ""
        "문자열이 공백으로만 구성되어 있는지 확인한다." {
            blankString.shouldBeBlank()
        }

        val numbers = listOf(1, 2, 3, 4, 5)

        "컬렉션이 지정된 요소를 포함하는지 확인한다." {
            numbers shouldContain 3
        }

        "컬렉션이 지정된 요소를 포함하지 않는지 확인한다." {
            numbers shouldNotContain 6
        }

        "컬렉션이 지정된 모든 요소를 포함하는지 확인한다." {
            numbers shouldContainAll listOf(2, 4)
        }

        "컬렉션이 지정된 요소들로 완전히 일치하는지 확인한다." {
            numbers.shouldContainExactly(1, 2, 3, 4, 5)
        }

        val value = 10
        "값이 지정된 범위에 속하는지 확인한다." {
            value shouldBeInRange 5..15
        }

        "값이 지정된 값보다 큰지 확인한다." {
            value shouldBeGreaterThan 5
        }

        "값이 지정된 값보다 작은지 확인한다." {
            value shouldBeLessThan 15
        }

        val message = "Hello, Kotest"
        "대소문자 무시하고 일치하는지" {
            message shouldBeEqualIgnoringCase "HELLO, KOTEST"
        }
    }
})

./gradlew test

% ./gradlew test

BUILD SUCCESSFUL in 548ms
3 actionable tasks: 3 up-to-date

 % ./gradlew test 

BUILD SUCCESSFUL in 28s
3 actionable tasks: 3 executed
user@AL02263852 kotest-tutorial % ./gradlew test

> Task :test

com.devkuma.kotest.tutorial.MyTest > My first test FAILED
    io.kotest.assertions.AssertionFailedError at MyTest.kt:9

58 tests completed, 1 failed, 8 skipped

> Task :test FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':test'.
> There were failing tests. See the report at: file:///Users/user/develop/kotlin-tutorial/kotest-tutorial/build/reports/tests/test/index.html

* Try:
> Run with --scan to get full insights.

BUILD FAILED in 26s
3 actionable tasks: 2 executed, 1 up-to-date

> There were failing tests. See the report at: file:///Users/user/develop/kotlin-tutorial/kotest-tutorial/build/reports/tests/test/index.html