move tests for tasks not implemented

src/test/java/oving7/abstractaccount/DebitAccountTest.java.unimplemented

@@ -0,0 +1,52 @@
+package oving7.abstractaccount;
+
+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 DebitAccountTest {
+
+	private static final double epsilon = 0.0005;
+
+	private DebitAccount sub;
+
+	@BeforeEach
+	public void setUp() {
+		sub = new DebitAccount();
+	}
+
+	@Test
+	@DisplayName("Check that deposits work as expected")
+	public void testDeposit() {
+		assertEquals(0.0, sub.getBalance(), epsilon, "The account balance was incorrect");
+
+		sub.deposit(10_000.0);
+		assertEquals(10_000.0, sub.getBalance(), epsilon, "The account balance was incorrect");
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			sub.deposit(-10_000.0);
+		}, "Negative deposit should have triggered an IllegalArgumentException!");
+
+		assertEquals(10_000.0, sub.getBalance(), epsilon, "The account balance was incorrect");
+	}
+
+	@Test
+	@DisplayName("Check that withdrawals work as expected")
+	public void testWithdraw() {
+		sub.deposit(20_000.0);
+		sub.withdraw(5000.0);
+		assertEquals(15_000.0, sub.getBalance(), epsilon, "The account balance was incorrect");
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			sub.withdraw(-10_000.0);
+		}, "Negative withdrawal should have triggered an IllegalArgumentException!");
+
+		assertEquals(15_000.0, sub.getBalance(), epsilon, "The account balance was incorrect");
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			sub.withdraw(20_000.0);
+		}, "Withdrawal exceeding the balance should have triggered an IllegalArgumentException");
+	}
+}