add NodeService

src/main/kotlin/ltd/hlaeja/service/NodeService.kt

@@ -0,0 +1,19 @@
+package ltd.hlaeja.service
+
+import ltd.hlaeja.entity.NodeEntity
+import ltd.hlaeja.repository.NodeRepository
+import mu.KotlinLogging
+import org.springframework.stereotype.Service
+
+private val log = KotlinLogging.logger {}
+
+@Service
+class NodeService(
+    private val nodeRepository: NodeRepository,
+) {
+
+    suspend fun addNode(
+        node: NodeEntity,
+    ): NodeEntity = nodeRepository.save(node)
+        .also { log.debug { "Added node ${it.id}" } }
+}

src/test/kotlin/ltd/hlaeja/service/NodeServiceTest.kt

@@ -0,0 +1,35 @@
+package ltd.hlaeja.service
+
+import io.mockk.coEvery
+import io.mockk.coVerify
+import io.mockk.mockk
+import kotlinx.coroutines.test.runTest
+import ltd.hlaeja.entity.NodeEntity
+import ltd.hlaeja.repository.NodeRepository
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+
+class NodeServiceTest {
+
+    val repository: NodeRepository = mockk()
+    lateinit var service: NodeService
+
+    @BeforeEach
+    fun setUp() {
+        service = NodeService(repository)
+    }
+
+    @Test
+    fun `add new node - success`() = runTest {
+        // given
+        val entity: NodeEntity = mockk()
+
+        coEvery { repository.save(any()) } returns entity
+
+        // when
+        service.addNode(entity)
+
+        // then
+        coVerify(exactly = 1) { repository.save(any()) }
+    }
+}