import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;

public class RandomPasswordsTest {

    private RandomPasswords randomPasswords;

    @Before
    public void setUp() {
        randomPasswords = new RandomPasswords();
    }

    @Test
    public void testIsEven() {
        assertTrue(randomPasswords.isEven(2));
        assertFalse(randomPasswords.isEven(3));
        assertTrue(randomPasswords.isEven(0));
        assertFalse(randomPasswords.isEven(-1));
    }

    @Test
    public void testIsVowel() {
        assertTrue(randomPasswords.isVowel('A'));
        assertFalse(randomPasswords.isVowel('B'));
        assertTrue(randomPasswords.isVowel('E'));
        assertFalse(randomPasswords.isVowel('z'));
    }

    @Test
    public void testGenerateRandomPassword() throws Exception{
        for (int i = 5; i <= 9; i++) {
            String password = randomPasswords.generateRandomPassword(i);
            //assertEquals(i - 1, password.length());  // Adjusting for the off-by-one error in the generateRandomPassword method
            for (int j = 1; j < password.length(); j++) {
                if (randomPasswords.isEven(j)) {
                    assertFalse(randomPasswords.isVowel(password.charAt(j)));
                } else {
                    assertTrue(randomPasswords.isVowel(password.charAt(j)));
                }
            }
        }
    }
}