[KTLN-825] Add samples (#909)

Author: LeoColman

spring-boot-kotlin-2/src/main/kotlin/com/baeldung/value/ValueAnnotation.kt

@@ -0,0 +1,19 @@
+package com.baeldung.value
+
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.stereotype.Component
+
+@Component
+class MyBean {
+    @Value("\${some.property}")
+    lateinit var propertyValue: String
+}
+
+@Component
+class MyBean2(@Value("\${some.property}") val propertyValue: String)
+
+@Component
+class MyBean3(@Value("\${non-existent-property:spring-default}") val propertyValue: String)
+
+@Component
+class MyBean4(@Value("\${non-existent-property:#{null}}") val propertyValue: String?)

spring-boot-kotlin-2/src/main/resources/application.yml

@@ -8,3 +8,5 @@ spring:
     username: sa
     password:
     driver-class-name: org.hsqldb.jdbcDriver
+
+some.property: "abc"

spring-boot-kotlin-2/src/test/kotlin/com/baeldung/value/ValueAnnotationIntegrationTest.kt

@@ -0,0 +1,37 @@
+package com.baeldung.value
+
+import com.baeldung.consoleapp.CommandLineFirstComponent
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.test.context.junit4.SpringRunner
+import kotlin.test.assertEquals
+
+@RunWith(SpringRunner::class)
+@SpringBootTest
+class ValueAnnotationIntegrationTest {
+
+    @Autowired
+    lateinit var myBean: MyBean
+
+    @Autowired
+    lateinit var myBean2: MyBean2
+
+    @Autowired
+    lateinit var myBean3: MyBean3
+
+    @Autowired
+    lateinit var myBean4: MyBean4
+
+
+    @Test
+    fun `Verify beans are getting the correct value`() {
+        assertEquals("abc", myBean.propertyValue)
+        assertEquals("abc", myBean2.propertyValue)
+        assertEquals("spring-default", myBean3.propertyValue)
+        assertEquals(null, myBean4.propertyValue)
+    }
+
+}