CppUnit testing

Hey guys, i am trying to test one of my classes using cppunit.

the class is suppose to extract data out of a certain text file and then displays it...

v Code:
oid readNasdaq::Nasdaq(fstream& myfile)
{
string templine ;
string line;

while (getline (myfile,templine) )
{
line.append(templine);
}

int NasdaqValueID = line.find ("id=\"yfs_l10_^ixic\">" , 0) ;
int NasdaqValueCount = line.find ("</span></td><td class=\"ticker_down\"><span class=\"streaming-datum\" id=\"yfs_c10_^ixic\">" , 0) ;

int LocationNasdaqValue = NasdaqValueID + 19 ;
int LengthOfNasdaqValue = NasdaqValueCount - LocationNasdaqValue ;

string NasdaqValue = line.substr( LocationNasdaqValue , LengthOfNasdaqValue ) ;

cout << " " << endl ;
cout << "The Value Index of Nasdaq is " << NasdaqValue << endl ;


int NasdaqValueChangeID = line.find ("id=\"yfs_c10_^ixic\">" , 0 ) ;
int NasdaqValueChangeCount = line.find ("</span></td><td class=\"right_cell ticker_down\"><span class=\"streaming-datum\" id=\"yfs_pp0_^ixic\">" , 0) ;

int LocationNasdaqValueChange = NasdaqValueChangeID + 19 ;
int LengthOfNasdaqValueChange = NasdaqValueChangeCount - LocationNasdaqValueChange ;

string NasdaqValueChange = line.substr (LocationNasdaqValueChange , LengthOfNasdaqValueChange ) ;

cout << "The Value Change for Nasdaq is " << NasdaqValueChange << endl ;
the problem i have with my cppunit is how am i suppose to read the value being outputted and test it...

Code:
#include "financetest.h"
#include "finance.h"



CPPUNIT_TEST_SUITE_REGISTRATION (FinanceTest);



void FinanceTest::setUp()
{
New = " ";
NewValue = " " ;


}

void FinanceTest::tearDown()
{

}

void FinanceTest::testEquals()
{

}

How can i continue from here.. really need some help from this