Add oving 2

src/test/java/oving2/AccountTest.java

@@ -0,0 +1,68 @@
+package oving2;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class AccountTest {
+
+	private static final double epsilon = 0.000001;
+
+	private Account account;
+
+	@BeforeEach
+	public void setUp() {
+		account = new Account(100, 5);
+	}
+
+	@Test
+	@DisplayName("Private fields")
+	public void testPrivateFields() {
+		TestHelper.checkIfFieldsPrivate(Account.class);
+	}
+
+	@Test
+	public void testConstructor() {
+		assertEquals(100.0d, account.getBalance(), epsilon);
+		assertEquals(5.0d, account.getInterestRate(), epsilon);
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			new Account(-1, 5);
+		});
+		assertThrows(IllegalArgumentException.class, () -> {
+			new Account(100, -1);
+		});
+	}
+
+	@Test
+	public void testSetInterestRate() {
+		account.setInterestRate(7);
+		assertEquals(7, account.getInterestRate(), epsilon);
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			account.setInterestRate(-2);
+		});
+	}
+
+	@Test
+	public void testDeposit() {
+		account.deposit(100);
+		assertEquals(200.0d, account.getBalance(), epsilon);
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			account.deposit(-50);
+		});
+	}
+
+	@Test
+	public void testWithdraw() {
+		account.withdraw(50);
+		assertEquals(50.0d, account.getBalance(), epsilon);
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			account.withdraw(150);
+		});
+	}
+}