pedja4
GitHub
commit
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung</groupId>
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<artifactId>kotlin</artifactId>
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<version>1.0-SNAPSHOT</version>
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<dependencies>
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<dependency>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-stdlib</artifactId>
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<version>${kotlin-stdlib.version}</version>
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</dependency>
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<dependency>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-test-junit</artifactId>
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<version>${kotlin-test-junit.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
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<testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
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<plugins>
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<plugin>
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<artifactId>kotlin-maven-plugin</artifactId>
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<groupId>org.jetbrains.kotlin</groupId>
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<version>${kotlin-maven-plugin.version}</version>
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<executions>
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<execution>
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<id>compile</id>
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<goals>
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<goal>compile</goal>
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</goals>
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</execution>
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<execution>
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<id>test-compile</id>
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<goals>
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<goal>test-compile</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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<properties>
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<junit.version>4.12</junit.version>
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<kotlin-test-junit.version>1.0.4</kotlin-test-junit.version>
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<kotlin-stdlib.version>1.0.4</kotlin-stdlib.version>
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<kotlin-maven-plugin.version>1.0.4</kotlin-maven-plugin.version>
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</properties>
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</project>
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package com.baeldung.kotlin
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fun main(args: Array<String>){
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println("hello word")
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}
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package com.baeldung.kotlin
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open class Item(val id: String, val name: String = "unknown_name") {
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open fun getIdOfItem(): String {
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return id
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}
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}
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class ItemWithCategory(id: String, name: String, val categoryId: String) : Item(id, name) {
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override fun getIdOfItem(): String {
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return id + name
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}
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}
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package com.baeldung.kotlin
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import java.util.*
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class ItemService {
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fun findItemNameForId(id: String): Item? {
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val itemId = UUID.randomUUID().toString()
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return Item(itemId, "name-$itemId")
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}
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}
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class ItemManager(val categoryId: String, val dbConnection: String) {
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var email = ""
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constructor(categoryId: String, dbConnection: String, email: String)
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: this(categoryId, dbConnection) {
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this.email = email
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}
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fun isFromSpecificCategory(catId: String): Boolean {
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return categoryId == catId
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}
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fun makeAnalyisOfCategory(catId: String): Unit {
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val result = if (catId == "100") "Yes" else "No"
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println(result)
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}
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}
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fun main(args: Array<String>) {
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val numbers = arrayOf("first", "second", "third", "fourth")
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var concat = ""
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for (n in numbers) {
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concat += n
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}
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var sum = 0
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for (i in 2..9) {
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sum += i
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}
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val firstName = "Tom"
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val secondName = "Mary"
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val concatOfNames = "$firstName + $secondName"
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println("Names: $concatOfNames")
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val itemManager = ItemManager("cat_id", "db://connection")
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val result = "function result: ${itemManager.isFromSpecificCategory("1")}"
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println(result)
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val number = 2
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if (number < 10) {
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println("number less that 10")
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} else if (number > 10) {
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println("number is greater that 10")
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}
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val name = "John"
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when (name) {
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"John" -> println("Hi man")
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"Alice" -> println("Hi lady")
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}
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}
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@ -0,0 +1,14 @@
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package com.baeldung.kotlin
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import java.util.concurrent.ThreadLocalRandom
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class ListExtension {
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fun <T> List<T>.random(): T? {
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if (this.isEmpty()) return null
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return get(ThreadLocalRandom.current().nextInt(count()))
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}
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fun <T> getRandomElementOfList(list: List<T>): T? {
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return list.random()
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}
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}
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@ -0,0 +1,20 @@
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package com.baeldung.kotlin
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import org.junit.Test
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import kotlin.test.assertNotNull
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class ItemServiceTest {
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@Test
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fun givenItemId_whenGetForOptionalItem_shouldMakeActionOnNonNullValue() {
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//given
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val id = "item_id"
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val itemService = ItemService()
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//when
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val result = itemService.findItemNameForId(id)
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//then
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assertNotNull(result?.let { it -> it.id })
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assertNotNull(result!!.id)
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}
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}
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@ -0,0 +1,19 @@
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package com.baeldung.kotlin
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import com.baeldung.kotlin.ListExtension
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import org.junit.Test
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import kotlin.test.assertTrue
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class ListExtensionTest {
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@Test
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fun givenList_whenExecuteExtensionFunctionOnList_shouldReturnRandomElementOfList(){
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//given
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val elements = listOf("a", "b", "c")
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//when
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val result = ListExtension().getRandomElementOfList(elements)
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//then
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assertTrue(elements.contains(result))
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}
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}
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