Build optimization (#1746)

* Build optimization

* Build optimization

spring-session/src/test/java/com/baeldung/spring/session/SessionControllerIntegrationTest.java

@@ -0,0 +1,64 @@
+package com.baeldung.spring.session;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.*;
+import redis.clients.jedis.Jedis;
+
+import java.util.Set;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class SessionControllerIntegrationTest {
+
+    private Jedis jedis;
+    private TestRestTemplate testRestTemplate;
+    private TestRestTemplate testRestTemplateWithAuth;
+    private String testUrl = "http://localhost:8080/";
+
+    @Before
+    public void clearRedisData() {
+        testRestTemplate = new TestRestTemplate();
+        testRestTemplateWithAuth = new TestRestTemplate("admin", "password", null);
+
+        jedis = new Jedis("localhost", 6379);
+        jedis.flushAll();
+    }
+
+    @Test
+    public void testRedisIsEmpty() {
+        Set<String> result = jedis.keys("*");
+        assertEquals(0, result.size());
+    }
+
+    @Test
+    public void testUnauthenticatedCantAccess() {
+        ResponseEntity<String> result = testRestTemplate.getForEntity(testUrl, String.class);
+        assertEquals(HttpStatus.UNAUTHORIZED, result.getStatusCode());
+    }
+
+    @Test
+    public void testRedisControlsSession() {
+        ResponseEntity<String> result = testRestTemplateWithAuth.getForEntity(testUrl, String.class);
+        assertEquals("hello admin", result.getBody()); // login worked
+
+        Set<String> redisResult = jedis.keys("*");
+        assertTrue(redisResult.size() > 0); // redis is populated with session data
+
+        String sessionCookie = result.getHeaders().get("Set-Cookie").get(0).split(";")[0];
+        HttpHeaders headers = new HttpHeaders();
+        headers.add("Cookie", sessionCookie);
+        HttpEntity<String> httpEntity = new HttpEntity<>(headers);
+
+        result = testRestTemplate.exchange(testUrl, HttpMethod.GET, httpEntity, String.class);
+        assertEquals("hello admin", result.getBody()); // access with session works worked
+
+        jedis.flushAll(); // clear all keys in redis
+
+        result = testRestTemplate.exchange(testUrl, HttpMethod.GET, httpEntity, String.class);
+        assertEquals(HttpStatus.UNAUTHORIZED, result.getStatusCode());// access denied after sessions are removed in redis
+
+    }
+}