Leverage @ConfigurationProperties scanning

README.adoc

@@ -895,18 +895,6 @@ data class BlogProperties(var title: String, val banner: Banner) {
 }
 ----
 
-Then we enable it at `BlogApplication` level.
-
-`src/main/kotlin/com/example/blog/BlogApplication.kt`
-[source,kotlin]
-----
-@SpringBootApplication
-@EnableConfigurationProperties(BlogProperties::class)
-class BlogApplication {
-	// ...
-}
-----
-
 To generate https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#configuration-metadata-annotation-processor[your own metadata] in order to get these custom properties recognized by your IDE, https://kotlinlang.org/docs/reference/kapt.html[kapt should be configured] with the `spring-boot-configuration-processor` dependency as following.
 
 `build.gradle.kts`
@@ -986,6 +974,20 @@ class HtmlController(private val repository: ArticleRepository,
 	// ...
 ----
 
+Since `@ConfigurationProperties` are not scanned automatically in test slices, we need to configure it explicitly in our
+test annotated with `@WebMvcTest`.
+
+`src/main/kotlin/com/example/blog/BlogApplication.kt`
+[source,kotlin]
+----
+@WebMvcTest
+@EnableConfigurationProperties(BlogProperties::class)
+class HttpControllersTests(@Autowired val mockMvc: MockMvc) {
+    // ...
+}
+----
+
+
 Restart the web application, refresh `http://localhost:8080/`, you should see the banner on the blog homepage.
 
 == Conclusion

src/main/kotlin/com/example/blog/BlogApplication.kt

@@ -1,11 +1,9 @@
 package com.example.blog
 
 import org.springframework.boot.autoconfigure.SpringBootApplication
-import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.boot.runApplication
 
 @SpringBootApplication
-@EnableConfigurationProperties(BlogProperties::class)
 class BlogApplication
 
 fun main(args: Array<String>) {

src/test/kotlin/com/example/blog/HttpControllersTests.kt

@@ -4,6 +4,7 @@ import com.ninjasquad.springmockk.MockkBean
 import io.mockk.every
 import org.junit.jupiter.api.Test
 import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest
 import org.springframework.test.web.servlet.MockMvc
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
@@ -11,6 +12,7 @@ import org.springframework.http.MediaType
 import org.springframework.test.web.servlet.result.MockMvcResultMatchers.*
 
 @WebMvcTest
+@EnableConfigurationProperties(BlogProperties::class)
 class HttpControllersTests(@Autowired val mockMvc: MockMvc) {
 
 	@MockkBean