Added The Sample Codes for Lateinit Initialization (#9253)

core-kotlin-modules/core-kotlin-lang-2/src/test/kotlin/com/baeldung/late/LateInitUnitTest.kt

@@ -0,0 +1,22 @@
+package com.baeldung.late
+
+import org.junit.Test
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class LateInitUnitTest {
+
+    private lateinit var answer: String
+
+    @Test(expected = UninitializedPropertyAccessException::class)
+    fun givenLateInit_WhenNotInitialized_ShouldThrowAnException() {
+        answer.length
+    }
+
+    @Test
+    fun givenLateInit_TheIsInitialized_ReturnsTheInitializationStatus() {
+        assertFalse { this::answer.isInitialized }
+        answer = "42"
+        assertTrue { this::answer.isInitialized }
+    }
+}