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package polynomial;

import java.util.Scanner;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 *
 * @author camilstaps
 */
public class PolynomialTest {
    
    public PolynomialTest() {
    }
    
    @BeforeClass
    public static void setUpClass() {
    }
    
    @AfterClass
    public static void tearDownClass() {
    }
    
    @Before
    public void setUp() {
    }
    
    @After
    public void tearDown() {
    }

    /**
     * Test of toString method, of class Polynomial.
     */
    @Test
    public void testToString() {
        System.out.println("toString");
        Polynomial instance = new Polynomial("3 5 -4 1 2.5 0 -3.4 -7");     // Test exp=0, exp=1, exp>1, positive & negative integer & floating point coefficients
        String expResult = "3.000000x^5-4.000000x+2.500000-3.400000x^-7";
        String result = instance.toString();
        assertEquals(expResult, result);
    }

    /**
     * Test of minus method, of class Polynomial.
     */
    @Test
    public void testMinus() {
        System.out.println("minus");
        Polynomial b = new Polynomial("5 3 4 2 3 1 10 0"); // 5x^3 + 4x^2 + 3x + 10
        Polynomial instance = new Polynomial("7 4 -4 2 3 1 5 0"); // 7x^4 - 4x^2 + 3x + 5
        instance.minus(b);
        assertEquals(new Polynomial("7 4 -5 3 -8 2 -5 0"), instance); // 7x^4 - 5x^3 - 8x^2 - 5
    }

    /**
     * Test of times method, of class Polynomial.
     */
    @Test
    public void testTimes() {
        System.out.println("times");
        Polynomial b = new Polynomial("5 3 4 2");
        Polynomial instance = new Polynomial("7 1 6 3");
        instance.times(b);
        assertEquals(new Polynomial("30 6 24 5 35 4 28 3"), instance);
    }

    /**
     * Test of divide method, of class Polynomial.
     */
    @Test
    public void testDivide() {
        System.out.println("divide");
        Polynomial b = null;
        Polynomial instance = new Polynomial();
        instance.divide(b);
        // TODO review the generated test code and remove the default call to fail.
        fail("The test case is a prototype.");
    }

    /**
     * Test of equals method, of class Polynomial.
     */
    @Test
    public void testEquals() {
        System.out.println("equals");
        Object other_poly = new Polynomial("3 5 4 2");
        Polynomial instance = new Polynomial("4 2 3 5");
        boolean expResult = true;
        boolean result = instance.equals(other_poly);
        assertEquals(expResult, result);
    }

    /**
     * Test of plus method, of class Polynomial.
     */
    @Test
    public void testPlus_Polynomial() {
        System.out.println("plus");
        Polynomial b = new Polynomial("5 3 4 2 3 1 10 0");              // 5x^3 + 4x^2 + 3x + 10
        Polynomial instance = new Polynomial("7 4 -4 2 7 1 5 0");       // 7x^4 - 4x^2 + 7x + 5
        instance.plus(b);
        assertEquals(new Polynomial("7 4 5 3 10 1 15 0"), instance);    // 7x^4 + 5x^3 + 10x + 15
    }

    /**
     * Test of plus method, of class Polynomial.
     */
    @Test
    public void testPlus_Term() {
        System.out.println("plus");
        Term t = Term.scanTerm(new Scanner("5 3"));
        
        Polynomial instance = new Polynomial("4 7 2 3 1 0");            // normal addition
        instance.plus(t);
        assertEquals(new Polynomial("4 7 7 3 1 0"), instance);
        
        instance = new Polynomial("4 7 -5 3 1 0");                      // addition when the term cancels out
        instance.plus(t);
        assertEquals(new Polynomial("4 7 1 0"), instance);
    }

    /**
     * Test of apply method, of class Polynomial.
     */
    @Test
    public void testApply() {
        System.out.println("apply");
        double x = 17.0;
        Polynomial instance = new Polynomial("5 4 0.5 3 9 2 8 0");
        double expResult = 422670.5;
        double result = instance.apply(x);
        assertEquals(expResult, result, 0.0);
    }
    
}