test: health check test 작성

server/src/test/java/com/ticketing/server/global/health/L7checkControllerTest.java

@@ -0,0 +1,51 @@
+package com.ticketing.server.global.health;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.concurrent.TimeUnit;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+class L7checkControllerTest {
+
+	private static final String L7CHECK = "/l7check";
+	private static final String HEALTH = "/actuator/health";
+
+	@Autowired
+	TestRestTemplate restTemplate;
+
+	@Test
+	void downAndUp() throws InterruptedException {
+		// before
+		expectUrlStatus(L7CHECK, HttpStatus.OK);
+		expectUrlStatus(HEALTH, HttpStatus.OK);
+
+		// down
+		restTemplate.delete(L7CHECK);
+
+		// then down
+		TimeUnit.MILLISECONDS.sleep(1000);
+		expectUrlStatus(L7CHECK, HttpStatus.SERVICE_UNAVAILABLE);
+		expectUrlStatus(HEALTH, HttpStatus.SERVICE_UNAVAILABLE);
+
+		// up
+		restTemplate.postForEntity(L7CHECK, null, Object.class);
+
+		// then up
+		TimeUnit.MILLISECONDS.sleep(1000);
+		expectUrlStatus(L7CHECK, HttpStatus.OK);
+		expectUrlStatus(HEALTH, HttpStatus.OK);
+	}
+
+	private void expectUrlStatus(String url, HttpStatus status) {
+		ResponseEntity<Object> res = restTemplate.getForEntity(url, Object.class);
+		assertThat(res.getStatusCode()).isEqualTo(status);
+	}
+
+}