BAEL-2580 JVM Platform Annotations in Kotlin - added Unit Test

core-kotlin-2/src/main/kotlin/com/baeldung/jvmannotations/Document.kt

@@ -5,6 +5,8 @@ import java.util.*
 interface Document {
 
     @JvmDefault
+    fun getTypeDefault() = "document"
+
     fun getType() = "document"
 }
 
@@ -23,9 +25,3 @@ class TextDocument : Document {
 }
 
 class XmlDocument(d : Document) : Document by d
-
-fun main() {
-    val myDocument = TextDocument()
-    val myTextDocument = XmlDocument(myDocument)
-    println("${myDocument.getType()} ${myTextDocument.getType()}")
-}

core-kotlin-2/src/test/kotlin/com/baeldung/range/DocumentTest.kt

@@ -0,0 +1,18 @@
+package com.baeldung.range
+
+import org.junit.Test
+import kotlin.test.assertEquals
+
+class DocumentTest {
+
+    @Test
+    fun testDefaultMethod() {
+
+        val myDocument = TextDocument()
+        val myTextDocument = XmlDocument(myDocument)
+
+        assertEquals("text", myDocument.getType())
+        assertEquals("text", myTextDocument.getType())
+        assertEquals("document", myTextDocument.getTypeDefault())
+    }
+}