keycloak-aplcache

diff --git a/integration/admin-client/src/main/java/org/keycloak/admin/client/Keycloak.java b/integration/admin-client/src/main/java/org/keycloak/admin/client/Keycloak.java
index fa7ed05..a37e085 100755
--- a/integration/admin-client/src/main/java/org/keycloak/admin/client/Keycloak.java
+++ b/integration/admin-client/src/main/java/org/keycloak/admin/client/Keycloak.java
@@ -20,6 +20,7 @@ package org.keycloak.admin.client;
 import org.jboss.resteasy.client.jaxrs.ResteasyClient;
 import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
 import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;
+import org.jboss.resteasy.plugins.providers.jackson.ResteasyJackson2Provider;
 import org.keycloak.admin.client.resource.BearerAuthFilter;
 import org.keycloak.admin.client.resource.RealmResource;
 import org.keycloak.admin.client.resource.RealmsResource;
@@ -31,7 +32,6 @@ import javax.net.ssl.HostnameVerifier;
 import javax.net.ssl.SSLSession;
 
 import java.net.URI;
-import java.security.KeyStore;
 
 import static org.keycloak.OAuth2Constants.PASSWORD;
 
@@ -66,12 +66,20 @@ public class Keycloak {
     }
 
     public static Keycloak getInstance(String serverUrl, String realm, String username, String password, String clientId, String clientSecret, SSLContext sslContext) {
-        ResteasyClient client = new ResteasyClientBuilder()
+        return getInstance(serverUrl, realm, username, password, clientId, clientSecret, sslContext, null);
+    }
+
+    public static Keycloak getInstance(String serverUrl, String realm, String username, String password, String clientId, String clientSecret, SSLContext sslContext, ResteasyJackson2Provider customJacksonProvider) {
+        ResteasyClientBuilder clientBuilder = new ResteasyClientBuilder()
                 .sslContext(sslContext)
                 .hostnameVerification(ResteasyClientBuilder.HostnameVerificationPolicy.WILDCARD)
-                .connectionPoolSize(10).build();
+                .connectionPoolSize(10);
+
+        if (customJacksonProvider != null) {
+            clientBuilder.register(customJacksonProvider);
+        }
 
-        return new Keycloak(serverUrl, realm, username, password, clientId, clientSecret, PASSWORD, client, null);
+        return new Keycloak(serverUrl, realm, username, password, clientId, clientSecret, PASSWORD, clientBuilder.build(), null);
     }
 
     private static ResteasyClientBuilder newResteasyClientBuilder() {

diff --git a/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/arquillian/SuiteContext.java b/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/arquillian/SuiteContext.java
index dfad4f5..fab303a 100644
--- a/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/arquillian/SuiteContext.java
+++ b/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/arquillian/SuiteContext.java
@@ -45,6 +45,12 @@ public final class SuiteContext {
     private boolean adminPasswordUpdated;
     private final Map<String, String> smtpServer = new HashMap<>();
 
+    /**
+     * True if the testsuite is running in the adapter backward compatibility testing mode,
+     * i.e. if the tests are running against newer auth server
+     */
+    private static final boolean adapterCompatTesting = Boolean.parseBoolean(System.getProperty("testsuite.adapter.compat.testing"));
+
     public SuiteContext(Set<ContainerInfo> arquillianContainers) {
         this.container = arquillianContainers;
         this.adminPasswordUpdated = false;
@@ -101,6 +107,10 @@ public final class SuiteContext {
         return container;
     }
 
+    public boolean isAdapterCompatTesting() {
+        return adapterCompatTesting;
+    }
+
     @Override
     public String toString() {
         String containers = "Auth server: " + (isAuthServerCluster() ? "\nFrontend: " : "")
@@ -111,6 +121,9 @@ public final class SuiteContext {
         if (isAuthServerMigrationEnabled()) {
             containers += "Migrated from: " + System.getProperty("migrated.auth.server.version") + "\n";
         }
+        if (isAdapterCompatTesting()) {
+            containers += "Adapter backward compatibility testing mode!\n";
+        }
         return "SUITE CONTEXT:\n"
                 + containers;
     }

diff --git a/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/util/AdminClientUtil.java b/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/util/AdminClientUtil.java
index 9543373..c1869d7 100644
--- a/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/util/AdminClientUtil.java
+++ b/testsuite/integration-arquillian/tests/base/src/main/java/org/keycloak/testsuite/util/AdminClientUtil.java
@@ -26,7 +26,10 @@ import java.security.cert.CertificateException;
 
 import javax.net.ssl.SSLContext;
 
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.apache.http.ssl.SSLContexts;
+import org.jboss.resteasy.plugins.providers.jackson.ResteasyJackson2Provider;
 import org.keycloak.admin.client.Keycloak;
 import org.keycloak.models.Constants;
 import org.keycloak.testsuite.arquillian.AuthServerTestEnricher;
@@ -38,7 +41,7 @@ import static org.keycloak.testsuite.util.IOUtil.PROJECT_BUILD_DIRECTORY;
 
 public class AdminClientUtil {
 
-    public static Keycloak createAdminClient() throws Exception {
+    public static Keycloak createAdminClient(boolean ignoreUnknownProperties) throws Exception {
         SSLContext ssl = null;
         if ("true".equals(System.getProperty("auth.server.ssl.required"))) {
             File trustore = new File(PROJECT_BUILD_DIRECTORY, "dependency/keystore/keycloak.truststore");
@@ -47,10 +50,24 @@ public class AdminClientUtil {
             System.setProperty("javax.net.ssl.trustStore", trustore.getAbsolutePath());
         }
 
+        ResteasyJackson2Provider jacksonProvider = null;
+
+        // We need to ignore unknown JSON properties e.g. in the adapter configuration representation
+        // during adapter backward compatibility testing
+        if (ignoreUnknownProperties) {
+            jacksonProvider = new ResteasyJackson2Provider();
+            ObjectMapper objectMapper = new ObjectMapper();
+            objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+            jacksonProvider.setMapper(objectMapper);
+        }
+
         return Keycloak.getInstance(AuthServerTestEnricher.getAuthServerContextRoot() + "/auth",
-                MASTER, ADMIN, ADMIN, Constants.ADMIN_CLI_CLIENT_ID, null, ssl);
+                MASTER, ADMIN, ADMIN, Constants.ADMIN_CLI_CLIENT_ID, null, ssl, jacksonProvider);
     }
 
+    public static Keycloak createAdminClient() throws Exception {
+        return createAdminClient(false);
+    }
 
     private static SSLContext getSSLContextWithTrustore(File file, String password) throws CertificateException, NoSuchAlgorithmException, KeyStoreException, IOException, KeyManagementException {
         if (!file.isFile()) {

diff --git a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/AbstractKeycloakTest.java b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/AbstractKeycloakTest.java
index 136a145..ae1db35 100644
--- a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/AbstractKeycloakTest.java
+++ b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/AbstractKeycloakTest.java
@@ -135,7 +135,7 @@ public abstract class AbstractKeycloakTest {
     public void beforeAbstractKeycloakTest() throws Exception {
         adminClient = testContext.getAdminClient();
         if (adminClient == null) {
-            adminClient = AdminClientUtil.createAdminClient();
+            adminClient = AdminClientUtil.createAdminClient(suiteContext.isAdapterCompatTesting());
             testContext.setAdminClient(adminClient);
         }
 

diff --git a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractDemoServletsAdapterTest.java b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractDemoServletsAdapterTest.java
index 275a078..f7a9335 100644
--- a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractDemoServletsAdapterTest.java
+++ b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/adapter/servlet/AbstractDemoServletsAdapterTest.java
@@ -469,8 +469,10 @@ public abstract class AbstractDemoServletsAdapterTest extends AbstractServletsAd
         assertNotNull(version2);
         assertNotNull(version2.getVersion());
         assertNotNull(version2.getBuildTime());
-        assertEquals(version.getVersion(), version2.getVersion());
-        assertEquals(version.getBuildTime(), version2.getBuildTime());
+        if (!suiteContext.isAdapterCompatTesting()) {
+            assertEquals(version.getVersion(), version2.getVersion());
+            assertEquals(version.getBuildTime(), version2.getBuildTime());
+        }
         client.close();
     }