mmn11 q2 unit test

package ex02;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;


class RationalTest {

    private Rational num1 = new Rational(48, 18);
    private Rational num2 = new Rational(18, 56);
    private Rational num3 = new Rational(18, 56);
    private Rational num4 = new Rational(18, 48);
    private Rational num5 = new Rational(94, 56);

    @org.junit.jupiter.api.Test
    void getNumerator() {
        assertEquals(num1.getNumerator(), 48);
    }

    @org.junit.jupiter.api.Test
    void getNumeratorNotEqual() {
        assertNotEquals(num1.getNumerator(), -48);
    }

    @org.junit.jupiter.api.Test
    void getDenominator() {
        assertEquals(num1.getDenominator(), 18);
    }

    @org.junit.jupiter.api.Test
    void getDenominatorNotEqual() {
        assertNotEquals(num1.getDenominator(), -18);
    }

    @org.junit.jupiter.api.Test
    void greaterThen() {
        assertTrue(num1.greaterThen(num2));
    }
    @org.junit.jupiter.api.Test
    void greaterThenSmaller() {
        assertFalse(num2.greaterThen(num1));
    }
    @org.junit.jupiter.api.Test
    void greaterThenEquals() {
        assertFalse(num1.greaterThen(num1));
    }

    @org.junit.jupiter.api.Test
    void equals() {
        assertTrue(num2.equals(num3));
    }

    @org.junit.jupiter.api.Test
    void equalsOpposite() {
        assertTrue(num3.equals(num2));
    }

    @org.junit.jupiter.api.Test
    void equalsSelf() {
        assertTrue(num1.equals(num1));
    }
    @org.junit.jupiter.api.Test
    void notEquals() {
        assertFalse(num1.equals(num3));
    }

    @org.junit.jupiter.api.Test
    void notEqualsNominator() {
        assertFalse(num3.equals(num4));
    }

    @org.junit.jupiter.api.Test
    void notEqualsDenominator() {
        assertFalse(num3.equals(num5));
    }

//48/18 + 18/56 = 251/84
//48/18 - 18/56 = 197/84
//48/18 * 18/56 = 6/7

    @org.junit.jupiter.api.Test
    void plus() {
        Rational result = new Rational(251,84);
        assertTrue(result.equals(num1.plus(num2)));
    }

    @org.junit.jupiter.api.Test
    void plusFalse() {
        Rational result = new Rational(251,84);
        assertFalse(result.equals(num1.plus(num1)));
    }

    @org.junit.jupiter.api.Test
    void minus() {
        Rational result = new Rational(197,84);
        assertTrue(result.equals(num1.minus(num2)));
    }

    @org.junit.jupiter.api.Test
    void minusFalse() {
        Rational result = new Rational(197,84);
        assertFalse(result.equals(num1.minus(num1)));
    }

    @org.junit.jupiter.api.Test
    void minusZero() {
        Rational result = new Rational(0,1);
        assertTrue(result.equals(num1.minus(num1)));
    }

    @org.junit.jupiter.api.Test
    void minusNothing() {
        Rational result = new Rational(0,1);
        assertTrue(num1.reduce().equals(num1.minus(result)));
    }

    @org.junit.jupiter.api.Test
    void multiply() {
        Rational result = new Rational(6,7);
        assertTrue(result.equals(num1.multiply(num2)));
    }

    @org.junit.jupiter.api.Test
    void multiplyFalse() {
        Rational result = new Rational(6,7);
        assertFalse(result.equals(num1.multiply(num1)));
    }

    @org.junit.jupiter.api.Test
    void reduce() {
        Rational result = new Rational(8,3);
        assertTrue(num1.reduce().equals(result));
    }

    @org.junit.jupiter.api.Test
    void gcd() {
        assertEquals(Rational.gcd(18,48), 6);
    }

    @org.junit.jupiter.api.Test
    void gcd2() {
        assertEquals(Rational.gcd(1,1), 1);
    }

    @org.junit.jupiter.api.Test
    void gcd3() {
        assertEquals(Rational.gcd(50,3), 1);
    }

    @org.junit.jupiter.api.Test
    void gcd4() {
        assertEquals(Rational.gcd(-90,5), 5);
    }

    @org.junit.jupiter.api.Test
    void gcd5ModuloTest() {
        assertEquals(Rational.gcd(90,5), 5);
    }
}