[feat] 테스트를 위한 embedded redis 를 구동시키기 위한 extension 설정

- JUnit 테스트를 실행할 때 extension을 detect할 수 있도록 기능 추가

src/test/java/camp/woowak/lab/helper/EmbeddedRedisExtension.java

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+package camp.woowak.lab.helper;
+
+import org.junit.jupiter.api.extension.BeforeAllCallback;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
+
+import redis.embedded.RedisServer;
+
+public class EmbeddedRedisExtension implements BeforeAllCallback {
+
+	private static RedisServer redisServer;
+	private static final ExtensionContext.Namespace NAMESPACE = ExtensionContext.Namespace.create(
+		EmbeddedRedisExtension.class);
+
+	@Override
+	public void beforeAll(ExtensionContext context) throws Exception {
+		if (redisServer == null) {
+			redisServer = new RedisServer(6379);
+			redisServer.start();
+			context.getRoot().getStore(NAMESPACE).put("redisServer", redisServer);
+		}
+	}
+
+	@DynamicPropertySource
+	static void redisProperties(DynamicPropertyRegistry registry) {
+		registry.add("spring.data.redis.host", () -> "localhost");
+		registry.add("spring.data.redis.port", () -> "6379");
+	}
+}

src/test/resources/META-INF/services/org.junit.jupiter.api.extension.Extension

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+camp.woowak.lab.helper.EmbeddedRedisExtension

src/test/resources/junit-platform.properties

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+junit.jupiter.extensions.autodetection.enabled=true
+junit.jupiter.extensions.autodetection.classpath.enabled=true