J unit Testing

import static org.junit.Assert.*;

import org.junit.Before;
import org.junit.Test;

//assertEquals(expected, actual, 0.001) delta is for precision 
public class BankAccountTest {
	BankAccount testAccount;

	@Before
	public void setUp() throws Exception {
		testAccount = new BankAccount("Test case", 123.45);
	}

	@Test
	public void testWithdraw() {
		testAccount.withdraw(23.64);
		assertEquals("Test case $99.81", testAccount.toString());
	}

	@Test
	public void testAddInterest() {
		BankAccount.setInterestRate(5.0);
		testAccount.addInterest();
		assertEquals("Test Case           $123.96", testAccount.toString());
	}

	@Test
	public void testIsBalanceOver() {
		// First Parameter is the expected result, the second result is the
		// actual result
		assertTrue(testAccount.isBalanceOver(123.43));
		assertTrue(testAccount.isBalanceOver(123.44));
		assertFalse(testAccount.isBalanceOver(123.45));
		assertFalse(testAccount.isBalanceOver(123.46));
	}

}