Feat: added test methods for Lesson15Test.java (62% coverage)

Author: jjcapparell

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

@@ -45,4 +45,15 @@ public double getSalary() {
   public void setSalary(double salary) {
     this.salary = salary;
   }
+
+  public String getDetails() {
+    return "ID: "
+        + getId()
+        + ", Name: "
+        + getName()
+        + ", Department: "
+        + getDepartment()
+        + ", Salary: "
+        + getSalary();
+  }
 }

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

@@ -1,19 +1,54 @@
 package com.codedifferently.lesson15;
 
-import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 class Lesson15Test {
 
+  private EmployeeManager employeeManager;
+  private Employee employee;
+
+  @BeforeEach
+  public void setUp() {
+    employeeManager = new EmployeeManager();
+    employee = new Employee(1, "Wall E", "Inbound", 30000.00);
+  }
+
+  @Test
+  public void testAddEmployee() {
+    employeeManager.addEmployee(employee);
+    assertEquals(1, employeeManager.getEmployeeCount());
+    assertEquals(employee, employeeManager.getEmployee(1));
+  }
+
+  @Test
+  public void testGetEmployee() {
+    employeeManager.addEmployee(employee);
+    Employee retrieved = employeeManager.getEmployee(1);
+    assertEquals(employee, retrieved);
+  }
+
+  @Test
+  public void testUpdateEmployee() {
+    employeeManager.addEmployee(employee);
+    Employee updatedEmployee = new Employee(1, "EVE", "Inbound", 80000.00);
+    employeeManager.updateEmployee(updatedEmployee);
+    assertEquals(updatedEmployee, employeeManager.getEmployee(1));
+  }
+
   @Test
-  public void testLesson15() {
-    assertThat(new Lesson15()).isNotNull();
+  public void testRemoveEmployee() {
+    employeeManager.addEmployee(employee);
+    employeeManager.removeEmployee(1);
+    assertEquals(0, employeeManager.getEmployeeCount());
   }
 
   @Test
-  public void testGetGreeting() {
-    // Act
-    Lesson15.main(null);
+  public void testGetEmployeeCount() {
+    assertEquals(0, employeeManager.getEmployeeCount());
+    employeeManager.addEmployee(employee);
+    assertEquals(1, employeeManager.getEmployeeCount());
   }
 }