Add unit tests to the staff package

The main purpose of this commit is to achieve 100% (line) test
coverage for the staff package.

src/test/java/catering/staff/StaffUnitTests.java

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// SPDX-FileCopyrightText: 2024 swt23w23
+package catering.staff;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.salespointframework.core.Currencies.EURO;
+
+import org.javamoney.moneta.Money;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
+
+@SpringBootTest
+public class StaffUnitTests {
+	private Employee defaultEmployee;
+
+	@Autowired
+	private StaffManagement staffManagement;
+
+	@BeforeEach
+	void setup() {
+		defaultEmployee = staffManagement.save(new Employee("Karl Baum", JobType.COOK, Money.of(10, EURO)));
+	}
+
+	@Test
+	@DirtiesContext
+	void staffNotEqualToDifferentClass() {
+		assertThat(defaultEmployee).isNotEqualTo(new Object());
+	}
+
+}