add schema validator

use ConfigurationProperties instead of Value for configuration

src/test/kotlin/com/example/demo/BaseUnitTest.kt

@@ -1,9 +1,33 @@
 package com.example.demo
 
+import com.example.demo.config.KafkaProperties
 import com.example.demo.services.kafka.Consumer
+import org.springframework.boot.test.context.TestConfiguration
 import org.springframework.boot.test.mock.mockito.MockBean
+import org.springframework.context.annotation.Bean
 
 open class BaseUnitTest {
     @MockBean
     lateinit var consumer: Consumer
+
+    @TestConfiguration
+    class TestConfig {
+        @Bean
+        fun kafkaProperties(): KafkaProperties = KafkaProperties(
+            bootstrapServers = "localhost:1111",
+            producer = KafkaProperties.Producer(
+                product = KafkaProperties.Producer.Product(
+                    defaultSyncTopic = "some-default",
+                ),
+            ),
+            consumer = KafkaProperties.Consumer(
+                groupId = "group",
+                topics = "topic",
+                autoStartup = false,
+            ),
+            validation = KafkaProperties.Validation(
+                schema = mapOf("product-sync" to "foo"),
+            ),
+        )
+    }
 }

src/test/kotlin/com/example/demo/services/kafka/ProducerImplTest.kt

@@ -4,10 +4,9 @@ import com.example.demo.BaseUnitTest
 import com.example.demo.models.Product
 import com.example.demo.services.kafka.dto.ProductDto
 import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.encodeToJsonElement
 import org.junit.runner.RunWith
-import org.mockito.kotlin.argumentCaptor
-import org.mockito.kotlin.doReturn
-import org.mockito.kotlin.whenever
+import org.mockito.kotlin.*
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.test.context.SpringBootTest
 import org.springframework.boot.test.mock.mockito.MockBean
@@ -31,6 +30,9 @@ class ProducerImplTest: BaseUnitTest() {
     @MockBean
     private lateinit var kafkaTemplate: KafkaTemplate<String, Any>
 
+    @MockBean
+    private lateinit var schemaValidator: SchemaValidator
+
     @Test
     fun produceProductInfo_success() {
         val topic = "some-topic"
@@ -50,6 +52,12 @@ class ProducerImplTest: BaseUnitTest() {
         whenever(kafkaTemplate.send(captor.capture()))
             .doReturn(CompletableFuture<SendResult<String, Any>>())
 
+        whenever(schemaValidator.validate(
+            eq("product-sync"),
+            eq(Json.encodeToJsonElement(product))
+        ))
+            .doAnswer { }
+
         producerImpl.produceProductInfo(topic, product)
 
         assertEquals(1, captor.allValues.count())