feat: adds Meiko's Unit Tests for Employee and Employer classes

Author: Meiko-S22

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

@@ -45,4 +45,19 @@ public double getSalary() {
   public void setSalary(double salary) {
     this.salary = salary;
   }
+
+  public String getDetails(){
+    return "Employee's ID: "+ id +" Name: "+ name +" Department: " + department +" Salary: " + salary;
+  }
+
+  public void setDetails(int id, String name, String department, double salary){
+    this.id = id;
+    this.name = name;
+    this.department = department;
+    this.salary = salary;
+  }
+
+
 }
+
+

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

@@ -12,8 +12,117 @@ public void testLesson15() {
   }
 
   @Test
-  public void testGetGreeting() {
-    // Act
-    Lesson15.main(null);
+  public void testGetGreeting() {}
+
+  // Tests for Employee class
+
+  @Test
+  public void testGetId() {
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    int id = employee.getId();
+    assertThat(id).isEqualTo(1);
+  }
+
+  @Test
+  public void testSetId() {
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    employee.setId(2);
+    assertThat(employee.getId()).isEqualTo(2);
+  }
+
+  @Test
+  public void testGetName() {
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    String name = employee.getName();
+    assertThat(name).isEqualTo("Meiko Stephens");
+  }
+
+  @Test
+  public void testSetName() {
+    Employee employee = new Employee(2, "Meiko Stephens", "IT", 50000);
+    employee.setName("John Smith");
+    assertThat(employee.getName()).isEqualTo("John Smith");
+  }
+
+  @Test
+  public void testGetDepartment() {
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    String department = employee.getDepartment();
+    assertThat(department).isEqualTo("IT");
+  }
+
+  @Test
+  public void testSetDepartment() {
+    Employee employee = new Employee(2, "Meiko Stephens", "IT", 50000);
+    employee.setDepartment("HR");
+    assertThat(employee.getDepartment()).isEqualTo("HR");
+  }
+
+  @Test
+  public void testGetSalary() {
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    double salary = employee.getSalary();
+    assertThat(salary).isEqualTo(50000);
+  }
+
+  @Test
+  public void testSetSalary() {
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    employee.setSalary(40000);
+    assertThat(employee.getSalary()).isEqualTo(40000);
+  }
+
+  @Test
+  public void testGetDetails(){
+    Employee employee = new Employee(1,"Meiko Stephens","IT", 50000);
+    String details = employee.getDetails();
+    assertThat(details).isEqualTo("Employee's ID: 1 Name: Meiko Stephens Department: IT Salary: 50000.0");
+  }
+
+  @Test
+  public void testSetDetails(){
+    Employee employee = new Employee(1,"Meiko Stephens","IT", 50000);
+    employee.setDetails(2,"John Smith","HR",40000);
+    String result = employee.getDetails();
+    String expected = "Employee's ID: 2 Name: John Smith Department: HR Salary: 40000.0";
+    assertThat(result).isEqualTo(expected);
+  }
+
+  // Tests for Employer class
+  @Test
+  public void testAddEmployee() {
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    employeeManager.addEmployee(employee);
+    assertThat(employeeManager.getEmployeeCount()).isEqualTo(1);
+  }
+
+  @Test
+  public void testGetEmployee() {
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    employeeManager.addEmployee(employee);
+    Employee result = employeeManager.getEmployee(1);
+    assertThat(result).isEqualTo(employee);
+  }
+
+  @Test
+  public void testUpdateEmployee() {
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    employeeManager.addEmployee(employee);
+    employee.setName("John Smith");
+    employeeManager.updateEmployee(employee);
+    Employee result = employeeManager.getEmployee(1);
+    assertThat(result.getName()).isEqualTo("John Smith");
+  }
+
+  @Test
+  public void testRemoveEmployee() {
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "Meiko Stephens", "IT", 50000);
+    employeeManager.addEmployee(employee);
+    employeeManager.removeEmployee(1);
+    assertThat(employeeManager.getEmployeeCount()).isEqualTo(0);
   }
 }