Added a simple test class to preserve directory structure

src/test/java/io/fp/campus/FacultyTest.java

+package io.fp.campus;
+
+import java.util.ArrayList;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class FacultyTest {
+
+    Faculty inf;
+
+    @BeforeEach
+    void setUp() {
+        inf = new Faculty("INF");
+        Professor schmolli = new Professor("Schmollinger", 77, "BPM", inf);
+        schmolli.setTalking(false);
+        
+        Assistent kevin = new Assistent("Jovanovic", 26, inf);
+        kevin.setBoss(schmolli);
+
+        Assistent juergen = new Assistent("Krauß", 30, inf);
+        juergen.setBoss(schmolli);
+
+        Assistent backe = new Assistent("Backe", 50, inf);
+        
+        inf.addProfessor(schmolli);
+        inf.addAssistent(kevin);
+        inf.addAssistent(juergen);
+        inf.addAssistent(backe);
+    }
+    @Test
+    void testGetProfWithAssis() {
+        ArrayList<Professor> profs = inf.getProfs();
+        ArrayList<Professor> profsWithAssis = inf.getProfWithAssis();
+        assertEquals(profs, profsWithAssis);
+    }
+}
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