Java factorial using TDD

Factorial.java

public class Factorial {
    public int fact(int number) {
        int i = 1;
        int result = 1;
        while (i <= number) {
            result = result * i;
            i++;
        }
        return result;
    }
}

FactorialTest.java

import org.junit.Test;

import static org.junit.Assert.*;

public class FactorialTest {
    @Test
    public void factorialZero() {
        Factorial f = new Factorial();
        int expected = 1;
        int actual = f.fact(0);
        assertEquals(expected, actual);
    }

    @Test
    public void factorialOne() {
        Factorial f = new Factorial();
        int expected = 1;
        int actual = f.fact(1);
        assertEquals(expected, actual);
    }

    @Test
    public void factorialTwo() {
        Factorial f = new Factorial();
        int expected = 2;
        int actual = f.fact(2);
        assertEquals(expected, actual);
    }


    @Test
    public void factorialFive() {
        Factorial f = new Factorial();
        int expected = 120;
        int actual = f.fact(5);
        assertEquals(expected, actual);
    }


}