/*
	Polynomial_t.cpp

	Unit tests for the Polynomial class

	Evan M. Purkhiser
	evanpurkhiser@gmail.com
*/

#include "Polynomial.hpp"
#include <cassert>

int main() {

	Polynomial poly1(5);
	Polynomial poly2(5);
	Polynomial poly3(2);
	Polynomial poly4(3);

	// Test for object equality
	assert(poly1 == poly2);
	assert(! (poly1 == poly3));

	assert(poly2 != poly3);

	// Test for object immediate add
	poly3 += poly4;
	assert(poly3 == poly1);

	poly1 += poly2;
	assert(poly1 != poly2);

	// Test the coefficent method
	Polynomial poly5(10);
	assert(poly4.coefficient(0) == 3);
	assert(poly5.coefficient(0) == 10);

	Polynomial poly6(2, 10);
	assert(poly6.coefficient(0) == 2);
	assert(poly6.coefficient(1) == 10);

	// Test immediate add polynomials with 2 coefficients
	Polynomial poly7(4, 2);

	poly6 += poly7;
	assert(poly6.coefficient(0) == 6);
	assert(poly6.coefficient(1) == 12);

	// Test the quadratic polynomial
	Polynomial poly8(4, 2, -5);
	assert(poly8.coefficient(0) == 4);
	assert(poly8.coefficient(1) == 2);
	assert(poly8.coefficient(2) == -5);

	// Test construction of a polynomial from a vector
	std::vector<double> coeffs(4);
	coeffs[0] = 1; coeffs[1] = 0; coeffs[2] = -1;

	Polynomial poly9(coeffs);
	assert(poly9.coefficient(0) == 1);
	assert(poly9.coefficient(1) == 0);
	assert(poly9.coefficient(2) == -1);
	assert(poly9.coefficient(3) == 0);

	double acoeffs[] = { 1, 0, -1 };
	Polynomial polya(acoeffs, 3);

	assert(polya.coefficient(0) == 1);
	assert(polya.coefficient(1) == 0);
	assert(polya.coefficient(2) == -1);

	// Test case for different size polynomial addition
	polya += poly7;

	// Test the factoring method
	assert(poly2.factor()[0] == 5);

	return 0;
}