content: /*
   * 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 org.apache.cassandra.db.guardrails;
  
  import java.util.Arrays;
  import java.util.Collection;
  
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  
  /**
   * Tests the guardrail for read-before-write list operations, {@link Guardrails#readBeforeWriteListOperationsEnabled}.
   */
  @RunWith(Parameterized.class)
  public class GuardrailReadBeforeWriteListOperationsTest extends GuardrailTester
  {
      @Parameterized.Parameter
      public boolean enabled;
  
      @Parameterized.Parameters(name = "read_before_write_list_operations_enabled={0}")
      public static Collection<Object> data()
      {
          return Arrays.asList(false, true);
      }
  
      public GuardrailReadBeforeWriteListOperationsTest()
      {
          super(Guardrails.readBeforeWriteListOperationsEnabled);
      }
  
      @Before
      public void before()
      {
          guardrails().setReadBeforeWriteListOperationsEnabled(enabled);
          Assert.assertEquals(enabled, guardrails().getReadBeforeWriteListOperationsEnabled());
  
          createTable("CREATE TABLE %s (k int PRIMARY KEY, l list<int>)");
      }
  
      @Test
      public void tesInsertFullValue() throws Throwable
      {
          // insert from scratch
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2])");
          assertRows(row(0, list(1, 2)));
  
          // insert overriding previous value
          assertValid("INSERT INTO %s (k, l) VALUES (0, [2, 3])");
          assertRows(row(0, list(2, 3)));
      }
  
      @Test
      public void testUpdateFullValue() throws Throwable
      {
          // update from scratch
          assertValid("UPDATE %s SET l = [1, 2] WHERE k = 0");
          assertRows(row(0, list(1, 2)));
  
          // update overriding previous value
          assertValid("UPDATE %s SET l = [2, 3] WHERE k = 0");
          assertRows(row(0, list(2, 3)));
      }
  
      @Test
      public void testDeleteFullValue() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2])");
          assertValid("DELETE l FROM %s WHERE k = 0");
          assertRows(row(0, null));
      }
  
      @Test
      public void testAppend() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2])");
          assertValid("UPDATE %s SET l = l + [3, 4] WHERE k = 0");
          assertRows(row(0, list(1, 2, 3, 4)));
      }
  
      @Test
      public void testPrepend() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2])");
          assertValid("UPDATE %s SET l = [3, 4] + l WHERE k = 0");
          assertRows(row(0, list(3, 4, 1, 2)));
      }
  
      @Test
      public void testUpdateByIndex() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2, 3])");
          testGuardrail("UPDATE %s SET l[1] = 4 WHERE k = 0",
                        "Setting of list items by index requiring read before write is not allowed",
                        row(0, list(1, 4, 3)));
      }
  
      @Test
      public void testDeleteByIndex() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2, 3])");
          testGuardrail("DELETE l[1] FROM %s WHERE k = 0",
                        "Removal of list items by index requiring read before write is not allowed",
                        row(0, list(1, 3)));
      }
  
      @Test
      public void testDeleteByItem() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2, 3])");
          testGuardrail("UPDATE %s SET l = l - [2] WHERE k = 0",
                        "Removal of list items requiring read before write is not allowed",
                        row(0, list(1, 3)));
      }
  
      @Test
      public void testBatch() throws Throwable
      {
          assertValid("INSERT INTO %s (k, l) VALUES (0, [1, 2, 3])");
  
          testGuardrail("BEGIN BATCH UPDATE %s SET l[1] = 0 WHERE k = 0; APPLY BATCH",
                        "Setting of list items by index requiring read before write is not allowed",
                        row(0, list(1, 0, 3)));
  
          testGuardrail("BEGIN BATCH DELETE l[1] FROM %s WHERE k = 0; APPLY BATCH",
                        "Removal of list items by index requiring read before write is not allowed",
                        row(0, list(1, 3)));
  
          testGuardrail("BEGIN BATCH UPDATE %s SET l = l - [3] WHERE k = 0; APPLY BATCH",
                        "Removal of list items requiring read before write is not allowed",
                        row(0, list(1)));
      }
  
      @Test
      public void testExcludedUsers() throws Throwable
      {
          testExcludedUsers(() -> "INSERT INTO %s (k, l) VALUES (0, [1, 2, 3, 4, 5])",
                            () -> "UPDATE %s SET l[1] = 4 WHERE k = 0",
                            () -> "DELETE l[1] FROM %s WHERE k = 0",
                            () -> "INSERT INTO %s (k, l) VALUES (0, [1, 2, 3])",
                            () -> "UPDATE %s SET l = l - [2] WHERE k = 0",
                            () -> "BEGIN BATCH UPDATE %s SET l[1] = 0 WHERE k = 0; APPLY BATCH",
                            () -> "BEGIN BATCH DELETE l[1] FROM %s WHERE k = 0; APPLY BATCH",
                            () -> "BEGIN BATCH UPDATE %s SET l = l - [3] WHERE k = 0; APPLY BATCH");
      }
  
      private void testGuardrail(String query, String expectedMessage, Object[]... rows) throws Throwable
      {
          if (enabled)
          {
              assertValid(query);
              assertRows(rows);
          }
          else
          {
              assertFails(query, expectedMessage);
          }
      }
  
      private void assertRows(Object[]... rows) throws Throwable
      {
          assertRowsNet(executeNet("SELECT * FROM %s"), rows);
      }
  }
  