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   * Licensed to the Apache Software Foundation (ASF) under one
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   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.db.virtual;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.Set;
  import javax.security.auth.Subject;
  
  import com.google.common.collect.ImmutableList;
  import org.junit.AfterClass;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.auth.AuthTestUtils;
  import org.apache.cassandra.auth.AuthenticatedUser;
  import org.apache.cassandra.auth.CassandraPrincipal;
  import org.apache.cassandra.auth.IAuthorizer;
  import org.apache.cassandra.auth.IResource;
  import org.apache.cassandra.auth.IRoleManager;
  import org.apache.cassandra.auth.JMXResource;
  import org.apache.cassandra.auth.Permission;
  import org.apache.cassandra.auth.RoleResource;
  import org.apache.cassandra.auth.jmx.AuthorizationProxy;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.cql3.CQLTester;
  
  import static org.apache.cassandra.auth.AuthTestUtils.ROLE_A;
  import static org.apache.cassandra.auth.AuthTestUtils.ROLE_B;
  
  public class JmxPermissionsCacheKeysTableTest extends CQLTester
  {
      private static final String KS_NAME = "vts";
      private static final AuthorizationProxy authorizationProxy = new AuthTestUtils.NoAuthSetupAuthorizationProxy();
  
      @SuppressWarnings("FieldCanBeLocal")
      private JmxPermissionsCacheKeysTable table;
  
      // this method is intentionally not called "setUpClass" to let it throw exception brought by startJMXServer method 
      @BeforeClass
      public static void setupAuth() throws Exception {
          // high value is used for convenient debugging
          DatabaseDescriptor.setPermissionsValidity(20_000);
  
          CQLTester.requireAuthentication();
  
          IRoleManager roleManager = DatabaseDescriptor.getRoleManager();
          roleManager.createRole(AuthenticatedUser.SYSTEM_USER, ROLE_A, AuthTestUtils.getLoginRoleOptions());
          roleManager.createRole(AuthenticatedUser.SYSTEM_USER, ROLE_B, AuthTestUtils.getLoginRoleOptions());
  
          List<IResource> resources = Arrays.asList(
                  JMXResource.root(),
                  JMXResource.mbean("org.apache.cassandra.db:type=Tables,*"));
  
          IAuthorizer authorizer = DatabaseDescriptor.getAuthorizer();
          for (IResource resource : resources)
          {
              Set<Permission> permissions = resource.applicablePermissions();
              authorizer.grant(AuthenticatedUser.SYSTEM_USER, permissions, resource, ROLE_A);
              authorizer.grant(AuthenticatedUser.SYSTEM_USER, permissions, resource, ROLE_B);
          }
  
          startJMXServer();
      }
  
      @Before
      public void config()
      {
          table = new JmxPermissionsCacheKeysTable(KS_NAME);
          VirtualKeyspaceRegistry.instance.register(new VirtualKeyspace(KS_NAME, ImmutableList.of(table)));
  
          // ensure nothing keeps cached between tests
          AuthorizationProxy.jmxPermissionsCache.invalidate();
          disablePreparedReuseForTest();
      }
  
      @AfterClass
      public static void tearDownClass()
      {
          DatabaseDescriptor.setPermissionsValidity(DatabaseDescriptor.getRawConfig().permissions_validity.toMilliseconds());
      }
  
      @Test
      public void testSelectAllWhenPermissionsAreNotCached() throws Throwable
      {
          assertEmpty(execute("SELECT * FROM vts.jmx_permissions_cache_keys"));
      }
  
      @Test
      public void testSelectAllWhenPermissionsAreCached() throws Throwable
      {
          cachePermissions(ROLE_A);
          cachePermissions(ROLE_B);
  
          assertRows(execute("SELECT * FROM vts.jmx_permissions_cache_keys"),
                  row("role_a"),
                  row("role_b"));
      }
  
      @Test
      public void testSelectPartitionWhenPermissionsAreNotCached() throws Throwable
      {
          assertEmpty(execute("SELECT * FROM vts.jmx_permissions_cache_keys WHERE role='role_a'"));
      }
  
      @Test
      public void testSelectPartitionWhenPermissionsAreCached() throws Throwable
      {
          cachePermissions(ROLE_A);
          cachePermissions(ROLE_B);
  
          assertRows(execute("SELECT * FROM vts.jmx_permissions_cache_keys WHERE role='role_a'"),
                  row("role_a"));
      }
  
      @Test
      public void testDeletePartition() throws Throwable
      {
          cachePermissions(ROLE_A);
          cachePermissions(ROLE_B);
  
          execute("DELETE FROM vts.jmx_permissions_cache_keys WHERE role='role_a'");
  
          assertRows(execute("SELECT * FROM vts.jmx_permissions_cache_keys"),
                  row("role_b"));
      }
  
      @Test
      public void testDeletePartitionWithInvalidValues() throws Throwable
      {
          cachePermissions(ROLE_A);
  
          execute("DELETE FROM vts.jmx_permissions_cache_keys WHERE role='invalid_role'");
  
          assertRows(execute("SELECT * FROM vts.jmx_permissions_cache_keys WHERE role='role_a'"),
                  row("role_a"));
      }
  
      @Test
      public void testTruncateTable() throws Throwable
      {
          cachePermissions(ROLE_A);
          cachePermissions(ROLE_B);
  
          execute("TRUNCATE vts.jmx_permissions_cache_keys");
  
          assertEmpty(execute("SELECT * FROM vts.jmx_permissions_cache_keys"));
      }
  
      @Test
      public void testUnsupportedOperations() throws Throwable
      {
          // range tombstone is not supported, however, this table has no clustering columns, so it is not covered by tests
  
          // column deletion is not supported, however, this table has no regular columns, so it is not covered by tests
  
          // insert is not supported
          assertInvalidMessage("Column modification is not supported by table vts.jmx_permissions_cache_keys",
                  "INSERT INTO vts.jmx_permissions_cache_keys (role) VALUES ('role_e')");
  
          // update is not supported, however, this table has no regular columns, so it is not covered by tests
      }
  
      private void cachePermissions(RoleResource roleResource)
      {
          Subject userSubject = new Subject();
          userSubject.getPrincipals().add(new CassandraPrincipal(roleResource.getRoleName()));
  
          authorizationProxy.authorize(userSubject, "queryNames", null);
      }
  }
  