/*
    Unit tests for Vector class    
*/
#include "stdstuff.h"
#include "Vector.h"

using namespace std;


#define __VERSION_i
#if defined __VERSION_x
double getX(const Vector& v) { return v.x; }
double getY(const Vector& v) { return v.y; }
double getZ(const Vector& v) { return v.z; }
#elif defined __VERSION_i
double getX(const Vector& v) { return v.i; }
double getY(const Vector& v) { return v.j; }
double getZ(const Vector& v) { return v.k; }
#else
double getX(const Vector& v) { return v.a; }
double getY(const Vector& v) { return v.b; }
double getZ(const Vector& v) { return v.c; }
#endif


int read() {
    Vector r;
    cout << "Test read() (enter 3 -5 6): ";
    r.read (cin);
    
    return (getX(r) == 3 && getY(r) == -5 && getZ(r) == 6);
}

int write() {
    Vector r(-2, 16, -4);
    cout << "Test write(): ";
    r.write(cout);
    cout << endl;
    return 0;
}

int addition() {
    Vector f1(1,-4,3),f2(1,2,8),t;    
    t.add (f1); // (1, -4, 3)
    t.add (f2); // (2, -2, 11)
    return getX(t) == 2 && getY(t) == -2 && getZ(t) == 11;
}

int crossProduct() {
    Vector f1(3,-65,-99),f2(12,23,33),r1;
    r1 = f1.cross(f2); // (132, -1287, 849)
    return getX(r1) == 132 && getY(r1) == -1287 && getZ(r1) == 849;
}

int dotProduct() {
    Vector f1(32,-4,-23),f2(-5,7,3);
    double r1;
    r1 = f1.dot(f2); // -257
    return ((r1 == -257));
}

int magnitude() {
    Vector v(23,43,2);
    // Note: I cast to int because there might be precision differences if the student did
    // not use the pow() function but did x*x 
    return (floor(v.magnitude()) == floor((sqrt(pow(23,2) + pow(-43,2) + pow(3,2)))));
}

int unitize() {
    Vector v(34,65,23);
    float m = sqrt(pow(34,2) + pow(65,2) + pow(23,2));
    v.unitize();
    return (sqrt(pow(getX(v),2) + pow(getY(v),2) + pow(getZ(v),2)) == 1);
}

int unitizeException() {
    Vector v(0,0,0);
    try {
        v.unitize();
    } catch (domain_error &e) {
        return 1;
    }
    catch(...) {
        return 0; 
    }
    return 0;
}
   
void printTest(char* testname, int score, int possible, int& totalScore) 
{
    if (possible == 0)
        cout << "(+1 if similar to '- 2i + 16j - 4k') " << testname << endl << endl;
    else
        cout << "(" << score << "/" << possible << ") " << testname << endl << endl;
    totalScore += score;
}

int main() {
    int total = 0;
    const int overallTotal = 8;
    printTest("Vector reading.", read(), 1, total);
    printTest("Vector printing.", write(), 0, total);
    printTest("Vector addition.",addition(),1,total);
    printTest("Dot product.",dotProduct(),1,total);
    printTest("Cross product.",crossProduct(),1,total);
    printTest("Magnitude of vector.", magnitude(),1,total);
    printTest("Vector normalize (unitize).", unitize(),1,total);
    printTest("'domain_error' exception thrown for attempt to unitize zero vector.", unitizeException(),1,total);
    
    cout << "---------------------------------------------" << endl;
    cout << "TOTAL: " << total << "/" << overallTotal << " (+1? See above.)" << endl;
    
    pause();    
}