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package part1;
import org.junit.Test;
import static org.junit.Assert.*;
public class RationalTest {
@Test
public void plus() {
assertEquals(new Rational(1, 2),
new Rational(1, 6).plus(new Rational(1, 3)));
}
@Test
public void unaryMinus() {
assertEquals(new Rational(1, 2), new Rational(3, -6).unaryMinus());
}
@Test
public void minus() {
assertEquals(new Rational(1, 3),
new Rational(1, 2).minus(new Rational(1, 6)));
}
@Test
public void times() {
assertEquals(new Rational(3, 10),
new Rational(3, 4).times(new Rational(2, 5)));
}
@Test
public void div() {
assertEquals(new Rational(2, 5),
new Rational(3, 10).div(new Rational(3, 4)));
}
@Test
public void toInt() {
assertEquals(1, new Rational(3, 2).toInt());
}
@Test
public void toDouble() {
assertEquals(0.5, new Rational(3, 6).toDouble(), 1e-10);
}
@Test
public void equals() {
assertEquals(new Rational(1, 2), new Rational(2, 4));
assertEquals(new Rational(-1, 2), new Rational(2, -4));
assertEquals(new Rational(2, 3), new Rational(-4, -6));
}
@Test(expected = ArithmeticException.class)
public void divZero() {
new Rational(1, 0);
}
@Test
public void getters() {
Rational r = new Rational(3, 6);
assertEquals(1, r.getNumerator());
assertEquals(2, r.getDenominator());
}
}