object @component

jeorg-spring-kotlin/mix-service/pom.xml

@@ -65,6 +65,16 @@
             <artifactId>kotlin-test-junit5</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.ninja-squad</groupId>
+            <artifactId>springmockk</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.kotest</groupId>
+            <artifactId>kotest-assertions-core-jvm</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>

jeorg-spring-kotlin/mix-service/src/main/kotlin/org/jesperancinha/smtd/mixservice/MixServiceApplication.kt

@@ -25,6 +25,7 @@ class MixServiceApplication(
         inventoryProcessor.performAll()
 
         mySingletonComponent.sayHello()
+        MySingletonComponent.sayHello()
     }
 
     private fun process(notificationEmail: Notification) {

jeorg-spring-kotlin/mix-service/src/main/kotlin/org/jesperancinha/smtd/mixservice/configuration/ConfigurationBeans.kt

@@ -11,8 +11,9 @@ sealed class Notification {
 
 @Component
 object MySingletonComponent {
-    fun sayHello() {
+    fun sayHello(): Boolean {
         println("Hello from MySingletonComponent!")
+        return true
     }
 }
 

jeorg-spring-kotlin/mix-service/src/test/kotlin/org/jesperancinha/smtd/mixservice/configuration/MySingletonComponentTest.kt

@@ -0,0 +1,25 @@
+package org.jesperancinha.smtd.mixservice.configuration
+
+import com.ninjasquad.springmockk.MockkBean
+import io.mockk.every
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.context.annotation.Primary
+import org.springframework.stereotype.Component
+import kotlin.test.Test
+
+@Component
+@Primary
+object MySingletonComponent {
+    fun sayHello(): Boolean {
+        println("AHA!")
+        return true
+    }
+}
+@SpringBootTest
+class MySingletonComponentTest {
+
+
+    @Test
+    fun `should be able to mock singleton object bean`() {
+    }
+}