feat:add lesson 15 employee and manager tests

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

@@ -45,4 +45,8 @@ public double getSalary() {
   public void setSalary(double salary) {
     this.salary = salary;
   }
+
+    public String getDetails() {
+    return id+ " " + name + " " + department + " " + salary;
+}
 }

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

@@ -0,0 +1,39 @@
+package com.codedifferently.lesson15;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import org.junit.jupiter.api.Test;
+
+public class EmployeeManagerTest {
+    @Test
+    public void testAddEmployee() {
+    EmployeeManager manager = new EmployeeManager();
+    Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+    manager.addEmployee(employee);
+    assertThat(manager.getEmployee(1)).isEqualTo(employee);
+  }
+
+  @Test 
+  public void testGetEmployee() {
+    EmployeeManager manager = new EmployeeManager();
+    Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+    manager.addEmployee(employee);
+    assertThat(manager.getEmployee(1)).isEqualTo(employee);
+  }
+
+  @Test
+  public void testRemoveEmployee () {
+    //Arrange
+    EmployeeManager manager = new EmployeeManager();
+    Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+
+    //Act
+    manager.addEmployee(employee);
+    manager.removeEmployee(1);
+
+    //Assertion
+    assertThat(manager.getEmployeeCount()).isEqualTo(0);
+  }
+}
+
+
+

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

@@ -0,0 +1,70 @@
+package com.codedifferently.lesson15;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import org.junit.jupiter.api.Test;
+
+class EmployeeTest {
+  @Test
+  public void testGetId(){
+    Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+    int id = employee.getId();
+    assertThat(id).isEqualTo(1);
+
+  }
+@Test
+public void testSetId (){
+  Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+  employee.setId(2);
+   assertThat(employee.getId()).isEqualTo(2);
+}
+
+@Test 
+public void testGetname (){
+  Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+  assertThat(employee.getName()).isEqualTo("Olivia James");
+}
+
+@Test
+public void testSetname (){
+  Employee employee = new Employee(1, "Olivia James", "IT", 100000);
+  employee.setName("Vicente");
+  assertThat(employee.getName().equals("Vicente"));
+}
+
+@Test
+public void getDepartment(){
+    Employee employee= new Employee(1, "Olivia James", "IT", 100000);
+     assertThat(employee.getDepartment()).isEqualTo("IT");
+}
+
+@Test
+public void setDepartment(){
+    Employee employee= new Employee(1, "Olivia James", "IT", 100000);
+    employee.setDepartment("HR");
+     assertThat(employee.getDepartment().equals("HR"));
+}
+
+@Test
+public void getSalary(){
+    Employee employee= new Employee(1, "Olivia James", "IT", 100000);
+     assertThat(employee.getSalary()).isEqualTo(100000);
+}
+
+@Test
+public void setSalary(){
+    Employee employee= new Employee(1, "Olivia James", "IT", 100000);
+    employee.setSalary(50000);
+    assertThat(employee.getSalary()).isEqualTo(50000);
+}
+
+@Test
+public void getDetails(){
+
+    Employee employee = new Employee(1, "Olivia James", "IT", 150000);
+    assertThat(employee.getDetails()).isEqualTo("1 Olivia James IT 150000.0");
+
+}
+
+}
+
+