@Test
public void testsubtract() {
assertEquals(subtractOne, zero.subtract(one));
assertEquals(one, zero.subtract(subtractOne));
assertEquals(posRat, posRat.subtract(zero));
assertEquals(negRat, negRat.subtract(zero));
assertEquals(zero, subtractOne.subtract(subtractOne));
assertEquals(new Fraction(1, 2), new Fraction(3, 2).subtract(one));
assertEquals(new Fraction(1, 4), new Fraction(-1, 4).subtract(new Fraction(-1, 2)));
assertEquals(new Fraction(-3, 10), new Fraction(-21, 20).subtract(new Fraction(-3, 4)));
assertEquals(new Fraction(100, 111), new Fraction(9587, 8547).subtract(new Fraction(17, 77)));
}
public void test1() {
Fraction r1 = new Fraction(2, 3);
Fraction r2 = new Fraction(4, 6);
Fraction r3 = new Fraction(4, 9);
Fraction r4 = new Fraction(4, 3);
Fraction r5 = new Fraction(0, 1);
Fraction r6 = new Fraction(1, 1);
Fraction r7 = new Fraction(1, 3);
Fraction r8 = new Fraction(2, 1);
Fraction r9 = new Fraction(2, 9);
Fraction r10 = new Fraction(-1, 3);
assertEquals(r1, r2);
assertEquals(r3, r1.multiply(r2));
assertEquals(r1, r1.multiply(r6));
assertEquals(r1, r6.multiply(r1));
assertEquals(r5, r5.multiply(r1));
assertEquals(r10, r10.multiply(r6));
assertEquals(r6, r1.divide(r2));
assertEquals(r5, r5.divide(r1));
assertEquals(r1, r1.divide(r6));
assertEquals(r7, r3.divide(r4));
try {
assertEquals(r7, r3.divide(r5));
} catch (ArithmeticException e) {
assertTrue(true);
}
assertEquals(r4, r1.add(r2));
assertEquals(r8, r2.add(r4));
assertEquals(r6, r1.add(r7));
assertEquals(r6, r5.add(r6));
assertEquals(r1, r10.add(r6));
assertEquals(r5, r1.subtract(r2));
assertEquals(r9, r2.subtract(r3));
assertEquals(r4, r4.subtract(r5));
assertEquals(r10, r7.subtract(r1));
}