[BAEL-19886] - moved related articles to the new core-kotlin-modules/…

…core-kotlin module

core-kotlin-2/README.md

@@ -4,11 +4,5 @@ This module contains articles about core Kotlin.
 
 ### Relevant articles:
 
-- [Kotlin Scope Functions](https://www.baeldung.com/kotlin-scope-functions)
-- [Kotlin Annotations](https://www.baeldung.com/kotlin-annotations)
-- [Split a List into Parts in Kotlin](https://www.baeldung.com/kotlin-split-list-into-parts)
-- [String Comparison in Kotlin](https://www.baeldung.com/kotlin-string-comparison)
-- [Guide to JVM Platform Annotations in Kotlin](https://www.baeldung.com/kotlin-jvm-annotations)
-- [Finding an Element in a List Using Kotlin](https://www.baeldung.com/kotlin-finding-element-in-list)
 - [Kotlin Ternary Conditional Operator](https://www.baeldung.com/kotlin-ternary-conditional-operator)
 - More articles: [[<-- prev]](/core-kotlin)

core-kotlin-modules/core-kotlin/README.md

@@ -0,0 +1,15 @@
+## Core Kotlin
+
+This module contains articles about Kotlin core features.
+
+### Relevant articles:
+- [Introduction to the Kotlin Language](https://www.baeldung.com/kotlin)
+- [Kotlin Java Interoperability](https://www.baeldung.com/kotlin-java-interoperability)
+- [Get a Random Number in Kotlin](https://www.baeldung.com/kotlin-random-number)
+- [Create a Java and Kotlin Project with Maven](https://www.baeldung.com/kotlin-maven-java-project)
+- [Guide to Sorting in Kotlin](https://www.baeldung.com/kotlin-sort)
+- [Creational Design Patterns in Kotlin: Builder](https://www.baeldung.com/kotlin-builder-pattern)
+- [Kotlin Scope Functions](https://www.baeldung.com/kotlin-scope-functions)
+- [Implementing a Binary Tree in Kotlin](https://www.baeldung.com/kotlin-binary-tree)
+- [JUnit 5 for Kotlin Developers](https://www.baeldung.com/junit-5-kotlin)
+- [Converting Kotlin Data Class from JSON using GSON](https://www.baeldung.com/kotlin-json-convert-data-class)

core-kotlin-modules/core-kotlin/pom.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-kotlin</artifactId>
+    <name>core-kotlin</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-kotlin-modules</groupId>
+        <artifactId>core-kotlin-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <junit.platform.version>1.1.1</junit.platform.version>
+    </properties>
+
+</project>

core-kotlin/src/main/java/com/baeldung/java/ArrayExample.java → core-kotlin-modules/core-kotlin/src/main/java/com/baeldung/interoperability/ArrayExample.java

@@ -1,4 +1,4 @@
-package com.baeldung.java;
+package com.baeldung.interoperability;
 
 import java.io.File;
 import java.io.FileReader;

core-kotlin/src/main/java/com/baeldung/java/Customer.java → core-kotlin-modules/core-kotlin/src/main/java/com/baeldung/interoperability/Customer.java

@@ -1,4 +1,4 @@
-package com.baeldung.java;
+package com.baeldung.interoperability;
 
 public class Customer {
 

core-kotlin/src/main/java/com/baeldung/java/StringUtils.java → core-kotlin-modules/core-kotlin/src/main/java/com/baeldung/introduction/StringUtils.java

@@ -1,4 +1,4 @@
-package com.baeldung.java;
+package com.baeldung.introduction;
 
 public class StringUtils {
     public static String toUpperCase(String name) {

core-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java → core-kotlin-modules/core-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java

@@ -1,7 +1,6 @@
 package com.baeldung.mavenjavakotlin;
 
 import com.baeldung.mavenjavakotlin.services.JavaService;
-import com.baeldung.mavenjavakotlin.services.KotlinService;
 
 public class Application {
 

core-kotlin/src/main/kotlin/com/baeldung/datastructures/Main.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/binarytree/Main.kt

@@ -1,4 +1,4 @@
-package com.baeldung.datastructures
+package com.baeldung.binarytree
 
 /**
  * Example of how to use the {@link Node} class.

core-kotlin/src/main/kotlin/com/baeldung/datastructures/Node.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/binarytree/Node.kt

@@ -1,13 +1,13 @@
-package com.baeldung.datastructures
+package com.baeldung.binarytree
 
 /**
  * An ADT for a binary search tree.
  * Note that this data type is neither immutable nor thread safe.
  */
 class Node(
-        var key: Int,
-        var left: Node? = null,
-        var right: Node? = null) {
+    var key: Int,
+    var left: Node? = null,
+    var right: Node? = null) {
 
     /**
      * Return a node with given value. If no such node exists, return null.

core-kotlin/src/main/kotlin/com/baeldung/kotlin/Example1.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/introduction/Example1.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 fun main(args: Array<String>){
     println("hello word")

core-kotlin/src/main/kotlin/com/baeldung/kotlin/Item.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/introduction/Item.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 open class Item(val id: String, val name: String = "unknown_name") {
     open fun getIdOfItem(): String {

core-kotlin/src/main/kotlin/com/baeldung/kotlin/ItemService.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/introduction/ItemService.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 import java.util.*
 

core-kotlin-modules/core-kotlin-lang-oop/src/main/kotlin/com/baeldung/kotlin/ListExtension.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/introduction/ListExtension.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 import java.util.concurrent.ThreadLocalRandom
 

core-kotlin/src/main/kotlin/com/baeldung/kotlin/MathematicsOperations.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/introduction/MathematicsOperations.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 class MathematicsOperations {
     fun addTwoNumbers(a: Int, b: Int): Int {

core-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/services/KotlinService.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/KotlinService.kt

@@ -1,4 +1,4 @@
-package com.baeldung.mavenjavakotlin.services
+package com.baeldung.mavenjavakotlin
 
 class KotlinService {
 

core-kotlin/src/main/kotlin/com/baeldung/sorting/SortingExample.kt → core-kotlin-modules/core-kotlin/src/main/kotlin/com/baeldung/sorting/SortingExample.kt

@@ -1,7 +1,5 @@
 package com.baeldung.sorting
 
-import kotlin.comparisons.*
-
 fun sortMethodUsage() {
     val sortedValues = mutableListOf(1, 2, 7, 6, 5, 6)
     sortedValues.sort()

core-kotlin/src/test/java/com/baeldung/kotlin/JavaCallToKotlinUnitTest.java → core-kotlin-modules/core-kotlin/src/test/java/com/baeldung/introduction/JavaCallToKotlinUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin;
+package com.baeldung.introduction;
 
 import org.junit.Test;
 

core-kotlin/src/test/kotlin/com/baeldung/datastructures/NodeTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/binarytree/NodeTest.kt

@@ -1,7 +1,8 @@
-package com.baeldung.datastructures
+package com.baeldung.binarytree
 
 import org.junit.After
-import org.junit.Assert.*
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
 import org.junit.Before
 import org.junit.Test
 
@@ -69,8 +70,10 @@ class NodeTest {
 
     @Test
     fun givenDepthTwo_whenPivotAtDepth2_then_Success() {
-        val left = Node(1, Node(0), Node(2))
-        val right = Node(5, Node(4), Node(6))
+        val left =
+            Node(1, Node(0), Node(2))
+        val right =
+            Node(5, Node(4), Node(6))
         val n = Node(3, left, right)
         assertEquals(left.left, n.find(0))
     }
@@ -243,7 +246,8 @@ class NodeTest {
      */
     @Test
     fun givenTreeDepthOne_whenValueAbsent_thenNoChange() {
-        val n = Node(1, Node(0), Node(2))
+        val n =
+            Node(1, Node(0), Node(2))
         n.delete(3)
         assertEquals(1, n.key)
         assertEquals(2, n.right!!.key)
@@ -281,7 +285,11 @@ class NodeTest {
      */
     @Test
     fun givenTreeDepthTwo_whenNodeToDeleteHasOneChild_thenChangeTree() {
-        val n = Node(2, Node(0, null, Node(1)), Node(3))
+        val n = Node(
+            2,
+            Node(0, null, Node(1)),
+            Node(3)
+        )
         n.delete(0)
         assertEquals(2, n.key)
         with(n.right!!) {
@@ -298,8 +306,13 @@ class NodeTest {
 
     @Test
     fun givenTreeDepthThree_whenNodeToDeleteHasTwoChildren_thenChangeTree() {
-        val l = Node(2, Node(1), Node(5, Node(4), Node(6)))
-        val r = Node(10, Node(9), Node(11))
+        val l = Node(
+            2,
+            Node(1),
+            Node(5, Node(4), Node(6))
+        )
+        val r =
+            Node(10, Node(9), Node(11))
         val n = Node(8, l, r)
         n.delete(8)
         assertEquals(6, n.key)

core-kotlin/src/test/kotlin/com/baeldung/kotlin/gson/GsonUnitTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/gson/GsonUnitTest.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin.gson
+package com.baeldung.gson
 
 import com.google.gson.Gson
 
@@ -11,7 +11,7 @@ class GsonUnitTest {
 
     @Test
     fun givenObject_thenGetJSONString() {
-        var jsonString = gson.toJson(TestModel(1,"Test"))
+        var jsonString = gson.toJson(TestModel(1, "Test"))
         Assert.assertEquals(jsonString, "{\"id\":1,\"description\":\"Test\"}")
     }
 

core-kotlin/src/test/kotlin/com/baeldung/kotlin/ArrayTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/interoperability/ArrayTest.kt

@@ -1,39 +1,37 @@
-package com.baeldung.kotlin
+package com.baeldung.interoperability
 
-import com.baeldung.java.ArrayExample
-import com.baeldung.java.Customer
 import org.junit.Test
 import kotlin.test.assertEquals
 
 class ArrayTest {
 
     @Test
     fun givenArray_whenValidateArrayType_thenComplete () {
-        val ex = ArrayExample()
+        val ex = com.baeldung.interoperability.ArrayExample()
         val numArray = intArrayOf(1, 2, 3)
 
         assertEquals(ex.sumValues(numArray), 6)
     }
 
     @Test
     fun givenCustomer_whenGetSuperType_thenComplete() {
-        val instance = Customer::class
+        val instance = com.baeldung.interoperability.Customer::class
         val supertypes = instance.supertypes
 
         assertEquals(supertypes[0].toString(), "kotlin.Any")
     }
 
     @Test
     fun givenCustomer_whenGetConstructor_thenComplete() {
-        val instance = Customer::class.java
+        val instance = com.baeldung.interoperability.Customer::class.java
         val constructors = instance.constructors
 
         assertEquals(constructors.size, 1)
-        assertEquals(constructors[0].name, "com.baeldung.java.Customer")
+        assertEquals(constructors[0].name, "com.baeldung.interoperability.Customer")
     }
 
     fun makeReadFile() {
-        val ax = ArrayExample()
+        val ax = com.baeldung.interoperability.ArrayExample()
         ax.writeList()
     }
 }

core-kotlin/src/test/kotlin/com/baeldung/kotlin/CustomerTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/interoperability/CustomerTest.kt

@@ -1,14 +1,13 @@
-package com.baeldung.kotlin
+package com.baeldung.interoperability
 
-import com.baeldung.java.Customer
 import org.junit.Test
 import kotlin.test.assertEquals
 
 class CustomerTest {
 
     @Test
     fun givenCustomer_whenNameAndLastNameAreAssigned_thenComplete() {
-        val customer = Customer()
+        val customer = com.baeldung.interoperability.Customer()
 
         // Setter method is being called
         customer.firstName = "Frodo"

core-kotlin/src/test/kotlin/com/baeldung/kotlin/ItemServiceTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/introduction/ItemServiceTest.kt

@@ -1,9 +1,10 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 import org.junit.Test
 import kotlin.test.assertNotNull
 
 class ItemServiceTest {
+
     @Test
     fun givenItemId_whenGetForOptionalItem_shouldMakeActionOnNonNullValue() {
         //given

core-kotlin/src/test/kotlin/com/baeldung/kotlin/KotlinJavaInteroperabilityTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/introduction/KotlinJavaInteroperabilityTest.kt

@@ -1,6 +1,5 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
-import com.baeldung.java.StringUtils
 import org.junit.Test
 import kotlin.test.assertEquals
 

core-kotlin/src/test/kotlin/com/baeldung/kotlin/LambdaTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/introduction/LambdaTest.kt

@@ -1,10 +1,11 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
 import org.junit.Test
 import kotlin.test.assertEquals
 
 
 class LambdaTest {
+
     @Test
     fun givenListOfNumber_whenDoingOperationsUsingLambda_shouldReturnProperResult() {
         //given

core-kotlin-modules/core-kotlin-lang-oop/src/test/kotlin/com/baeldung/kotlin/ListExtensionTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/introduction/ListExtensionTest.kt

@@ -1,12 +1,12 @@
-package com.baeldung.kotlin
+package com.baeldung.introduction
 
-import com.baeldung.kotlin.ListExtension
 import org.junit.Test
 import kotlin.test.assertTrue
 
 class ListExtensionTest {
+
     @Test
-    fun givenList_whenExecuteExtensionFunctionOnList_shouldReturnRandomElementOfList(){
+    fun givenList_whenExecuteExtensionFunctionOnList_shouldReturnRandomElementOfList() {
         //given
         val elements = listOf("a", "b", "c")
 

core-kotlin/src/test/kotlin/com/baeldung/kotlin/junit5/Calculator.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/junit5/Calculator.kt

@@ -1,4 +1,4 @@
-package com.baeldung.kotlin.junit5
+package com.baeldung.junit5
 
 class Calculator {
     fun add(a: Int, b: Int) = a + b

core-kotlin/src/test/kotlin/com/baeldung/kotlin/junit5/CalculatorTest5.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/junit5/CalculatorUnitTest.kt

@@ -1,9 +1,9 @@
-package com.baeldung.kotlin.junit5
+package com.baeldung.junit5
 
 import org.junit.jupiter.api.*
 import org.junit.jupiter.api.function.Executable
 
-class CalculatorTest5 {
+class CalculatorUnitTest {
     private val calculator = Calculator()
 
     @Test

core-kotlin/src/test/kotlin/com/baeldung/kotlin/junit5/DivideByZeroException.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/junit5/DivideByZeroException.kt

@@ -1,3 +1,3 @@
-package com.baeldung.kotlin.junit5
+package com.baeldung.junit5
 
 class DivideByZeroException(val numerator: Int) : Exception()

core-kotlin/src/test/kotlin/com/baeldung/kotlin/junit5/SimpleTest5.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/junit5/SimpleUnitTest.kt

@@ -1,10 +1,10 @@
-package com.baeldung.kotlin.junit5
+package com.baeldung.junit5
 
 import org.junit.jupiter.api.Assertions
 import org.junit.jupiter.api.Disabled
 import org.junit.jupiter.api.Test
 
-class SimpleTest5 {
+class SimpleUnitTest {
 
     @Test
     fun `isEmpty should return true for empty lists`() {

core-kotlin/src/test/kotlin/com/baeldung/sorting/SortingExampleKtTest.kt → core-kotlin-modules/core-kotlin/src/test/kotlin/com/baeldung/sorting/SortingExampleKtTest.kt

@@ -1,9 +1,8 @@
 package com.baeldung.sorting
 
+import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.Test
 
-import org.junit.jupiter.api.Assertions.*
-
 class SortingExampleKtTest {
 
     @Test