[BAEL-3311] Spring Cloud Gateway Routing Predicate Factories (#8549)

* [BAEL-3311] Spring Cloud Gateway Routing Predicate Factories

* [BAEL-3311] Code formatting

* [BAEL-3311] LiveTests

spring-cloud/spring-cloud-gateway/src/test/java/com/baeldung/springcloudgateway/customfilters/gatewayapp/CustomFiltersLiveTest.java

@@ -5,6 +5,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 import org.assertj.core.api.Condition;
 import org.junit.jupiter.api.BeforeEach;
 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.web.server.LocalServerPort;
@@ -27,6 +28,7 @@ public class CustomFiltersLiveTest {
     @LocalServerPort
     String port;
 
+    @Autowired
     private WebTestClient client;
 
     @BeforeEach

spring-cloud/spring-cloud-gateway/src/test/java/com/baeldung/springcloudgateway/custompredicates/CustomPredicatesApplicationLiveTest.java

@@ -0,0 +1,67 @@
+package com.baeldung.springcloudgateway.custompredicates;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.net.URI;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.json.JSONTokener;
+import org.junit.Before;
+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.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.RequestEntity;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.ActiveProfiles;
+
+/**
+ * This test requires
+ */
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+@ActiveProfiles("customroutes")
+public class CustomPredicatesApplicationLiveTest {
+
+    @LocalServerPort
+    String serverPort;
+    
+    @Autowired
+    private TestRestTemplate restTemplate;
+
+    @Test
+    void givenNormalCustomer_whenCallHeadersApi_thenResponseForNormalCustomer() throws JSONException {
+
+        String url = "http://localhost:" + serverPort + "/api/headers";        
+        ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);
+        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+        
+        JSONObject json = new JSONObject(response.getBody());
+        JSONObject headers = json.getJSONObject("headers");
+        assertThat(headers.getString("Goldencustomer")).isEqualTo("false");
+        
+    }
+
+    @Test
+    void givenGoldenCustomer_whenCallHeadersApi_thenResponseForGoldenCustomer() throws JSONException {
+
+        String url = "http://localhost:" + serverPort + "/api/headers";   
+        RequestEntity<Void> request = RequestEntity
+            .get(URI.create(url))
+            .header("Cookie", "customerId=baeldung")
+            .build();
+            
+        ResponseEntity<String> response = restTemplate.exchange(request, String.class);
+        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+        
+        JSONObject json = new JSONObject(response.getBody());
+        JSONObject headers = json.getJSONObject("headers");
+        assertThat(headers.getString("Goldencustomer")).isEqualTo("true");
+        
+    }
+    
+}