BAEL-4446: Getting cookies from httpclient response example (#10104)

httpclient-2/src/test/java/com/baeldung/httpclient/cookies/HttpClientGettingCookieValueUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.httpclient.cookies;
+
+import org.apache.http.client.CookieStore;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.protocol.HttpClientContext;
+import org.apache.http.cookie.Cookie;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.impl.cookie.BasicClientCookie;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+
+
+public class HttpClientGettingCookieValueUnitTest {
+    private static Logger log = LoggerFactory.getLogger(HttpClientGettingCookieValueUnitTest.class);
+
+    private static final String SAMPLE_URL = "http://www.baeldung.com/";
+
+    @Test
+    public final void whenSettingCustomCookieOnTheRequest_thenGettingTheSameCookieFromTheResponse() throws IOException {
+        HttpClientContext context = HttpClientContext.create();
+        context.setAttribute(HttpClientContext.COOKIE_STORE, createCustomCookieStore());
+
+        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+            try (CloseableHttpResponse response = httpClient.execute(new HttpGet(SAMPLE_URL), context)) {
+                CookieStore cookieStore = context.getCookieStore();
+                Cookie customCookie = cookieStore.getCookies()
+                  .stream()
+                  .peek(cookie -> log.info("cookie name:{}", cookie.getName()))
+                  .filter(cookie -> "custom_cookie".equals(cookie.getName()))
+                  .findFirst()
+                  .orElseThrow(IllegalStateException::new);
+
+                assertEquals("test_value", customCookie.getValue());
+            }
+        }
+    }
+
+    private BasicCookieStore createCustomCookieStore() {
+        BasicCookieStore cookieStore = new BasicCookieStore();
+        BasicClientCookie cookie = new BasicClientCookie("custom_cookie", "test_value");
+        cookie.setDomain("baeldung.com");
+        cookie.setPath("/");
+        cookieStore.addCookie(cookie);
+        return cookieStore;
+    }
+}