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   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * 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
   * limitations under the License.
   */
  package com.datastax.dse.driver.api.core.metadata.schema;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  import com.datastax.oss.driver.api.core.CqlSession;
  import com.datastax.oss.driver.api.core.cql.SimpleStatement;
  import com.datastax.oss.driver.api.core.metadata.schema.KeyspaceMetadata;
  import com.datastax.oss.driver.api.testinfra.session.SessionRule;
  import com.datastax.oss.driver.categories.ParallelizableTests;
  import java.util.Optional;
  import org.junit.experimental.categories.Category;
  
  /* Abstract class to hold common methods for Metadata Schema tests. */
  @Category(ParallelizableTests.class)
  public abstract class AbstractMetadataIT {
  
    /* Convenience method for executing a CQL statement using the test's Session Rule. */
    public void execute(String cql) {
      getSessionRule()
          .session()
          .execute(
              SimpleStatement.builder(cql)
                  .setExecutionProfile(getSessionRule().slowProfile())
                  .build());
    }
  
    /**
     * Convenience method for retrieving the Keyspace metadata from this test's Session Rule. Also
     * asserts the Keyspace exists and has the expected name.
     */
    public DseKeyspaceMetadata getKeyspace() {
      Optional<KeyspaceMetadata> keyspace =
          getSessionRule().session().getMetadata().getKeyspace(getSessionRule().keyspace());
      assertThat(keyspace)
          .isPresent()
          .hasValueSatisfying(
              ks -> {
                assertThat(ks).isInstanceOf(DseKeyspaceMetadata.class);
                assertThat(ks.getName()).isEqualTo(getSessionRule().keyspace());
              });
      return ((DseKeyspaceMetadata) keyspace.get());
    }
  
    /* Concrete ITs should return their ClassRule SessionRule. */
    protected abstract SessionRule<CqlSession> getSessionRule();
  }
  