@Test
public void testVectorATan() {
VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
b.cols[0].noNulls = true;
VectorExpression expr = new FuncATanDoubleToDouble(0, 1);
expr.evaluate(b);
Assert.assertEquals(Math.atan(0.5d), resultV.vector[4]);
}