Re: unit testing private methods

hi
i am trying out PrivilegedAccessor class (of
http://sourceforge.net/projects/privaccessor/) along with junit to test
some private methods that process double[]
[] .I think this uses reflection to access private methods

public class MyClass {
    private double[] processArray(double[] inarray){
    double[] ret=new double[inarray.length];
    for(int i=0;i<inarray.length;i++){
    ret[i]=inarray[i]+100.0;
    }
    return ret;
    }
}

here is the testcase class
<code>
double[] outputarray=(double[])
(PrivilegedAccessor.invokeMethod(mc,"processArray(double[])",inputarray));
assertEquals(outputarray,ans);
<code>

when i run the test ,i get an error message like

java.lang.NoSuchMethodException: Method 'processArray(double[])'s
parameter nr1 (double[]) not found

This error originates at the call PrivilegedAccessor.invokeMethod(..)
can someone tell me why this happens?