update: update the Test code using JUnit in JVM tutorial

docs/topics/jvm/jvm-test-using-junit.md

@@ -1,20 +1,18 @@
 [//]: # (title: Test code using JUnit in JVM – tutorial)
 
-This tutorial will show you how to write a simple unit test and run it with the Gradle build tool.
+This tutorial shows you how to write a simple unit test and run it with the Gradle build tool.
 
-The example in the tutorial has the [kotlin.test](https://kotlinlang.org/api/latest/kotlin.test/index.html) library under the hood and runs the test using JUnit.
+The example in the tutorial has the [`kotlin.test`](https://kotlinlang.org/api/latest/kotlin.test/index.html) library under the hood and runs the test using JUnit.
 
 To get started, first download and install the latest version of [IntelliJ IDEA](https://www.jetbrains.com/idea/download/index.html).
 
 ## Add dependencies
 
-1. Open a Kotlin project in IntelliJ IDEA. If you don't already have a project, [create one](jvm-get-started.md#create-an-application).
+1. Open a Kotlin project in IntelliJ IDEA. If you don't have a project,
+   [create one](https://www.jetbrains.com/help/idea/create-your-first-kotlin-app.html#create-project).
 
-   > Specify **JUnit 5** as your test framework when creating your project.
-   >
-   {type="note"}
-
-2. Open the `build.gradle(.kts)` file and add the following dependency to the Gradle configuration. This dependency will allow you to work with `kotlin.test` and `JUnit`:
+2. Open the `build.gradle(.kts)` file and check that the `testImplementation` dependency is present.
+   This dependency allows you to work with `kotlin.test` and `JUnit`:
 
     <tabs group="build-script">
     <tab title="Kotlin" group-key="kotlin">
@@ -62,15 +60,43 @@ To get started, first download and install the latest version of [IntelliJ IDEA]
    </tab>
    </tabs>
 
-   > If you created the project using the **New Project** wizard, the task will be added automatically.
-   > 
+   > If you use the `useJUnitPlatform()`function in your build script, 
+   > the `kotlin-test` library automatically includes JUnit 5 as a dependency.
+   > This setup enables access to all JUnit 5 APIs, along with the `kotlin-test` API,
+   > in JVM-only projects and JVM tests of Kotlin Multiplatform (KMP) projects.
+   >
    {type="note"}
 
+Here's a complete code for the `build.gradle.kts`:
+
+```kotlin
+plugins {
+    kotlin("jvm") version "%kotlinVersion%"
+}
+
+group = "org.example"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation(kotlin("test"))
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+```
+{initial-collapse-state="collapsed"}
+
 ## Add the code to test it
 
-1. Open the `main.kt` file in `src/main/kotlin`.
+1. Open the `Main.kt` file in `src/main/kotlin`.
 
-   The `src` directory contains Kotlin source files and resources. The `main.kt` file contains sample code that will print `Hello, World!`.
+   The `src` directory contains Kotlin source files and resources. 
+   The `Main.kt` file contains sample code that prints `Hello, World!`.
 
 2. Create the `Sample` class with the `sum()` function that adds two integers together:
 
@@ -85,28 +111,32 @@ To get started, first download and install the latest version of [IntelliJ IDEA]
 
 ## Create a test
 
-1. In IntelliJ IDEA, select **Code** | **Generate** | **Test...** for the `Sample` class.
+1. In IntelliJ IDEA, select **Code** | **Generate** | **Test...** for the `Sample` class:
 
-   ![Create a test](create-test.png)
+   ![Create a test](generate-test.png)
+
+2. Specify the name of the test class. For example, `SampleTest`:
 
-2. Specify the name of the test class. For example, `SampleTest`.
+   ![Create a test](create-test.png)
 
-   IntelliJ IDEA creates the `SampleTest.kt` file in the `test` directory. This directory contains Kotlin test source files and resources.
+   IntelliJ IDEA creates the `SampleTest.kt` file in the `test` directory.
+   This directory contains Kotlin test source files and resources.
 
    > You can also manually create a `*.kt` file for tests in `src/test/kotlin`.
    >
    {type="note"}
 
-2. Add the test code for the `sum()` function in `SampleTest.kt`:
+3. Add the test code for the `sum()` function in `SampleTest.kt`:
 
-   * Define the test `testSum()` function using the [@Test annotation](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/-test/index.html).
-   * Check that the `sum()` function returns the expected value by using the [assertEquals()](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/assert-equals.html) function.
+   * Define the test `testSum()` function using the [`@Test` annotation](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/-test/index.html).
+   * Check that the `sum()` function returns the expected value by using the [`assertEquals()`](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/assert-equals.html) function.
 
    ```kotlin
+   import org.example.Sample
+   import org.junit.jupiter.api.Assertions.*
    import kotlin.test.Test
-   import kotlin.test.assertEquals
 
-   internal class SampleTest {
+   class SampleTest {
 
        private val testSample: Sample = Sample()
 
@@ -120,7 +150,7 @@ To get started, first download and install the latest version of [IntelliJ IDEA]
 
 ## Run a test
 
-1. Run the test using the gutter icon.
+1. Run the test using the gutter icon:
 
    ![Run the test](run-test.png)
 
@@ -130,7 +160,7 @@ To get started, first download and install the latest version of [IntelliJ IDEA]
 
 2. Check the result in the **Run** tool window:
 
-   ![Check the test result. The test passed successfully](check-the-result.png)
+   ![Check the test result. The test passed successfully](test-successful.png)
 
    The test function was executed successfully.
 
@@ -146,14 +176,16 @@ To get started, first download and install the latest version of [IntelliJ IDEA]
 
 4. Run the test again and check the result:
 
-   ![Check the test result. The test has been failed](check-the-result-2.png)
+   ![Check the test result. The test has failed](test-failed.png)
 
    The test execution failed.
 
 ## What's next
 
 Once you've finished your first test, you can:
 
-* Try to write another test using other [kotlin.test](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/) functions. For example, you could use the [`assertNotEquals()`](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/assert-not-equals.html) function.
-* [Create your first application](jvm-get-started-spring-boot.md) with Kotlin and Spring Boot.
-* Watch [these video tutorials](https://www.youtube.com/playlist?list=PL6gx4Cwl9DGDPsneZWaOFg0H2wsundyGr) on YouTube, which demonstrate how to use Spring Boot with Kotlin and JUnit 5.
+* Write more tests using other [`kotlin.test`](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/) functions.
+   For example, use the [`assertNotEquals()`](https://kotlinlang.org/api/latest/kotlin.test/kotlin.test/assert-not-equals.html) function.
+* Improve your test output with the [Kotlin Power-assert compiler plugin](power-assert.md).
+   The plugin enriches the test output with contextual information.
+* [Create your first server-side application](jvm-get-started-spring-boot.md) with Kotlin and Spring Boot.