// test double->double version
VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
b.cols[0].noNulls = true;
VectorExpression expr = new FuncLog2DoubleToDouble(0, 1);
expr.evaluate(b);
Assert.assertEquals(Math.log(0.5d) / Math.log(2), resultV.vector[4]);
// test long->double version
b = getVectorizedRowBatchLongInDoubleOut();
resultV = (DoubleColumnVector) b.cols[1];
b.cols[0].noNulls = true;
expr = new FuncLog2LongToDouble(0, 1);
expr.evaluate(b);
Assert.assertEquals(Math.log(1) / Math.log(2), resultV.vector[3]);
}