content: package com.alibaba.qlexpress4.runtime.operator.unary;
  
  import java.math.BigInteger;
  
  import com.alibaba.qlexpress4.exception.ErrorReporter;
  import com.alibaba.qlexpress4.exception.MockErrorReporter;
  import com.alibaba.qlexpress4.runtime.Value;
  import com.alibaba.qlexpress4.runtime.operator.MockValue;
  
  import junit.framework.TestCase;
  import org.junit.Assert;
  
  public class MinusMinusSuffixUnaryOperatorTest extends TestCase {
      public void testExecute() {
          ErrorReporter errorReporter = new MockErrorReporter();
          MinusMinusSuffixUnaryOperator minusMinusSuffixUnaryOperator = MinusMinusSuffixUnaryOperator.getInstance();
          
          Value value = new MockValue(10L, null);
          Object result = minusMinusSuffixUnaryOperator.execute(value, errorReporter);
          Assert.assertEquals(9L, result);
          
          BigInteger bigInteger = BigInteger.valueOf(10L);
          value = new MockValue(bigInteger, BigInteger.class);
          BigInteger bigIntegerResult = (BigInteger)minusMinusSuffixUnaryOperator.execute(value, errorReporter);
          Assert.assertEquals(9L, bigIntegerResult.longValue());
      }
  }