Test fixtures and lifecycle in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to run setup before each test in Kotlin.

Kotlin

import org.junit.jupiter.api.[1]

class CalculatorTest {
    @[1]
    fun setup() {
        // setup code here
    }
}

Drag options to blanks, or click blank then click option'

ATest

BAfterEach

CBeforeEach

DBeforeAll

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Test instead of @BeforeEach

Using @BeforeAll which runs only once before all tests

The @BeforeEach annotation runs the setup method before each test method.

2fill in blank

medium

Complete the code to run cleanup after each test in Kotlin.

Kotlin

import org.junit.jupiter.api.[1]

class CalculatorTest {
    @[1]
    fun cleanup() {
        // cleanup code here
    }
}

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AAfterEach

BBeforeAll

CTest

DBeforeEach

Attempts:

3 left

💡 Hint

Common Mistakes

Using @BeforeEach instead of @AfterEach

Using @AfterAll which runs only once after all tests

The @AfterEach annotation runs the cleanup method after each test method.

3fill in blank

hard

Fix the error in the annotation to run code once before all tests in Kotlin.

Kotlin

import org.junit.jupiter.api.[1]

class CalculatorTest {
    companion object {
        @JvmStatic
        @[1]
        fun initAll() {
            // initialization code
        }
    }
}

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ABeforeAll

BBeforeEach

CAfterEach

DTest

Attempts:

3 left

💡 Hint

Common Mistakes

Using @BeforeEach which runs before every test instead of once

Not using companion object and @JvmStatic for @BeforeAll

The @BeforeAll annotation runs the method once before all tests. It must be static in Kotlin, so it's inside companion object with @JvmStatic.

4fill in blank

hard

Fill both blanks to create a test class with setup and cleanup methods using JUnit 5 in Kotlin.

Kotlin

import org.junit.jupiter.api.[1]
import org.junit.jupiter.api.[2]

class SampleTest {
    @[1]
    fun setup() {
        // setup code
    }

    @[2]
    fun cleanup() {
        // cleanup code
    }
}

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ABeforeEach

BTest

CAfterEach

DBeforeAll

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up @BeforeAll and @BeforeEach

Using @Test instead of lifecycle annotations

Use @BeforeEach for setup before each test and @AfterEach for cleanup after each test.

5fill in blank

hard

Fill all three blanks to define a test with setup, test method, and cleanup using JUnit 5 in Kotlin.

Kotlin

import org.junit.jupiter.api.[1]
import org.junit.jupiter.api.[2]
import org.junit.jupiter.api.[3]

class MathTest {
    @[1]
    fun setup() {
        // setup code
    }

    @[2]
    fun testAddition() {
        // test code
    }

    @[3]
    fun cleanup() {
        // cleanup code
    }
}

Drag options to blanks, or click blank then click option'

ABeforeEach

BTest

CAfterEach

DBeforeAll

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting @Test on the test method

Using @BeforeAll or @AfterAll instead of per-test lifecycle annotations

Use @BeforeEach for setup, @Test for the test method, and @AfterEach for cleanup.