// testExceptions.cc  Daniel Roche
// This will test the exception throwing of the Rational_C class.

#include <iostream>
using std::cout;
using std::endl;

#include "rational.h"

// Test what happens when we try to set a denominator to zero in the
// constructor.  The numerator will be set to the given value.
void constructorTest( int num )
{
	bool passed = false;

	// try to do it.
	try {
		Rational_C f(num, 0);
		passed = false; // This line should not be reached.
	}
	catch( DenomIsZero x ) {
		passed = true;  // We want to catch this exception
	}

	if( passed ) cout << "\tPassed" << endl;
	else cout << "\tFailed" << endl;
}

// Test what happens when we try to set the denominator of an existing Rational
// to zero.  The num and denom will be the values used to construct the rational
// initially.  The denom should be nonzero.
void setDenomTest( int num, int denom ) {
	bool passed = false;

	bool constructedYet = false;
	try {
		Rational_C f(num, denom);
		constructedYet = true;
		f.setDenom(0);
		passed = false; // shouldn't reach this statement
	}
	catch( DenomIsZero x ) {
		passed = constructedYet; // Only pass if the number was successfully constructed first.
	}

	if( passed ) cout << "\tPassed" << endl;
	else cout << "\tFailed" << endl;
}

int main(void) {
	cout << "Constructor exception tests:" << endl;
	constructorTest(5);
	constructorTest(-2243);
	constructorTest(0);

	cout << "setDeonom exception tests:" << endl;
	setDenomTest(5,4);
	setDenomTest(-2,9);
	setDenomTest(-8,-4);

	return 0;
}