feat: adds employee manager test page

Author: AmiyahJo

lesson_15/tdd/tdd_app/src/main/java/com/codedifferently/lesson15/EmployeeManager.java

@@ -6,7 +6,7 @@
 public class EmployeeManager {
   private Map<Integer, Employee> employees;
 
-  public EmployeeManager() {
+  public EmployeeManager() { 
     employees = new HashMap<>();
   }
 

lesson_15/tdd/tdd_app/src/test/java/com/codedifferently/lesson15/EmployeeManagerTest.java

@@ -0,0 +1,31 @@
+package com.codedifferently.lesson15;
+
+import org.junit.jupiter.api.Test;
+
+public class EmployeeManagerTest {
+    @Test
+    void testAddEmployee() {
+    //employees.put(employee.getId(), employee);
+        var addEmployee = new ;
+    }
+
+    @Test
+    void testUpdateEmployee() {
+
+    }
+
+    @Test
+    void testGetEmployee() {
+
+    }
+
+    @Test
+    void testRemoveEmployee() {
+
+    }
+
+    @Test
+    void testGetEmployeeCount() {
+
+    }
+}

lesson_15/tdd/tdd_app/src/test/java/com/codedifferently/lesson15/Lesson15Test.java

@@ -1,7 +1,6 @@
 package com.codedifferently.lesson15;
 
 import static org.assertj.core.api.Assertions.assertThat;
-
 import org.junit.jupiter.api.Test;
 
 class Lesson15Test {
@@ -15,5 +14,6 @@ public void testLesson15() {
   public void testGetGreeting() {
     // Act
     Lesson15.main(null);
-  }
+  } 
+
 }