public void testDoubleColumnColumnIfExpr() {
// Just spot check because we already checked the logic for long.
// The code is from the same template file.
VectorizedRowBatch batch = getBatch1Long3DoubleVectors();
VectorExpression expr = new IfExprDoubleColumnDoubleColumn(0, 1, 2, 3);
expr.evaluate(batch);
// get result vector
DoubleColumnVector r = (DoubleColumnVector) batch.cols[3];
// verify standard case