src/test/kotlin/kr/co/vividnext/sodalive/support/EmbeddedRedisInitializer.kt

@@ -1,36 +1,42 @@
 package kr.co.vividnext.sodalive.support
 
+import org.springframework.boot.test.util.TestPropertyValues
 import org.springframework.context.ApplicationContextInitializer
 import org.springframework.context.ConfigurableApplicationContext
 import redis.embedded.RedisServer
+import redis.embedded.core.PortProvider
 
 class EmbeddedRedisInitializer : ApplicationContextInitializer<ConfigurableApplicationContext> {
-    companion object {
-        const val PORT = 16379
-    }
-
     override fun initialize(applicationContext: ConfigurableApplicationContext) {
-        EmbeddedRedisHolder.start()
+        val port = EmbeddedRedisHolder.start()
+        TestPropertyValues.of(
+            "spring.redis.host=127.0.0.1",
+            "spring.redis.port=$port",
+            "spring.redis.ssl-enabled=false"
+        ).applyTo(applicationContext.environment)
     }
 }
 
 private object EmbeddedRedisHolder {
     private var redisServer: RedisServer? = null
+    private var port: Int? = null
     private var shutdownHookRegistered = false
 
     @Synchronized
-    fun start() {
-        if (redisServer != null) {
-            return
+    fun start(): Int {
+        port?.let {
+            return it
         }
 
+        val selectedPort = PortProvider.newEphemeralPortProvider().get()
         redisServer = RedisServer.newRedisServer()
-            .port(EmbeddedRedisInitializer.PORT)
+            .port(selectedPort)
             .setting("bind 127.0.0.1")
             .setting("daemonize no")
             .setting("appendonly no")
             .build()
             .also { it.start() }
+        port = selectedPort
 
         if (!shutdownHookRegistered) {
             Runtime.getRuntime().addShutdownHook(
@@ -40,11 +46,14 @@ private object EmbeddedRedisHolder {
             )
             shutdownHookRegistered = true
         }
+
+        return selectedPort
     }
 
     @Synchronized
     fun stop() {
         redisServer?.stop()
         redisServer = null
+        port = null
     }
 }

src/test/kotlin/kr/co/vividnext/sodalive/support/EmbeddedRedisTestConfiguration.kt

@@ -4,6 +4,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.SerializationFeature
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
 import com.fasterxml.jackson.module.kotlin.KotlinModule
+import org.springframework.beans.factory.annotation.Value
 import org.springframework.boot.test.context.TestConfiguration
 import org.springframework.context.annotation.Bean
 import org.springframework.data.redis.connection.RedisConnectionFactory
@@ -15,8 +16,11 @@ import org.springframework.data.redis.listener.RedisMessageListenerContainer
 @TestConfiguration
 class EmbeddedRedisTestConfiguration {
     @Bean
-    fun redisConnectionFactory(): RedisConnectionFactory {
-        return LettuceConnectionFactory(RedisStandaloneConfiguration("127.0.0.1", EmbeddedRedisInitializer.PORT))
+    fun redisConnectionFactory(
+        @Value("\${spring.redis.host}") host: String,
+        @Value("\${spring.redis.port}") port: Int
+    ): RedisConnectionFactory {
+        return LettuceConnectionFactory(RedisStandaloneConfiguration(host, port))
     }
 
     @Bean