content: /*
   * Copyright (c) 2015, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
   * the terms of the GNU General Public License, version 2.0, as published by the
   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
   * limited to OpenSSL) that is licensed under separate terms, as designated in a
   * particular file or component or in included license documentation. The
   * authors of MySQL hereby grant you an additional permission to link the
   * program and your derivative works with the separately licensed software that
   * they have included with MySQL.
   *
   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
   * http://oss.oracle.com/licenses/universal-foss-exception.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
   */
  
  package com.mysql.cj.protocol.a;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.math.BigInteger;
  import java.nio.ByteBuffer;
  import java.nio.ByteOrder;
  
  import org.junit.jupiter.api.Test;
  
  import com.mysql.cj.Constants;
  import com.mysql.cj.conf.DefaultPropertySet;
  import com.mysql.cj.result.StringValueFactory;
  import com.mysql.cj.result.ValueFactory;
  
  /**
   * Tests for {@link MysqlBinaryValueDecoder}.
   */
  public class MysqlBinaryValueDecoderTest {
      private MysqlBinaryValueDecoder valueDecoder = new MysqlBinaryValueDecoder();
  
      @Test
      public void testSampleValues() {
          ValueFactory<String> vf = new StringValueFactory(new DefaultPropertySet());
          String decoded;
  
          byte[] intTrivial = new byte[] { 1, 0, 0, 0 };
          decoded = this.valueDecoder.decodeInt4(intTrivial, 0, 4, vf);
          assertEquals("1", decoded);
  
          byte[] intOffset1 = new byte[] { 0x7F, 0x12, 0x34, 0x56, 0x78 };
          decoded = this.valueDecoder.decodeInt4(intOffset1, 1, 4, vf);
          assertEquals("2018915346", decoded);
      }
  
      @Test
      public void testInt4Limits() {
          ValueFactory<String> vf = new StringValueFactory(new DefaultPropertySet());
          String decoded;
  
          byte[] signedInt4Min = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(Integer.MIN_VALUE).array();
          decoded = this.valueDecoder.decodeInt4(signedInt4Min, 0, 4, vf);
          assertEquals(String.valueOf(Integer.MIN_VALUE), decoded);
  
          byte[] signedInt4Max = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(Integer.MAX_VALUE).array();
          decoded = this.valueDecoder.decodeInt4(signedInt4Max, 0, 4, vf);
          assertEquals(String.valueOf(Integer.MAX_VALUE), decoded);
  
          byte[] unsignedInt4Max = ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(((long) Integer.MAX_VALUE) * 2 + 1).array();
          decoded = this.valueDecoder.decodeUInt4(unsignedInt4Max, 0, 4, vf);
          assertEquals("4294967295", decoded);
      }
  
      @Test
      public void testInt8Limits() {
          ValueFactory<String> vf = new StringValueFactory(new DefaultPropertySet());
          String decoded;
  
          byte[] signedInt8Min = ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(Long.MIN_VALUE).array();
          decoded = this.valueDecoder.decodeInt8(signedInt8Min, 0, 8, vf);
          assertEquals(String.valueOf(Long.MIN_VALUE), decoded);
  
          byte[] signedInt8Max = ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN).putLong(Long.MAX_VALUE).array();
          decoded = this.valueDecoder.decodeInt8(signedInt8Max, 0, 8, vf);
          assertEquals(String.valueOf(Long.MAX_VALUE), decoded);
          // again with UInt decoder to make sure it's handled correctly
          decoded = this.valueDecoder.decodeUInt8(signedInt8Max, 0, 8, vf);
          assertEquals(String.valueOf(Long.MAX_VALUE), decoded);
  
          // big-endian version of 2^64-1 (aka Long.MAX_VALUE * 2 + 1)
          byte[] be = Constants.BIG_INTEGER_MAX_LONG_VALUE.multiply(new BigInteger("2")).add(new BigInteger("1")).toByteArray();
          // uppermost byte is sign byte
          byte[] unsignedInt8Max = new byte[] { be[8], be[7], be[6], be[5], be[4], be[3], be[2], be[1] };
          assertEquals(8, unsignedInt8Max.length);
          decoded = this.valueDecoder.decodeUInt8(unsignedInt8Max, 0, 8, vf);
          assertEquals("18446744073709551615", decoded);
      }
  }
  