feat: adds John's Unit Tests for Employee & EmployeeManager classes.

Author: jbey251

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 "The Employee's ID: "
+        + id
+        + " Name: "
+        + name
+        + " Department: "
+        + department
+        + " Salary: "
+        + salary;
+  }
 }

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

@@ -13,7 +13,221 @@ public void testLesson15() {
 
   @Test
   public void testGetGreeting() {
-    // Act
     Lesson15.main(null);
   }
+
+  @Test
+  public void getId() {
+    // Arrange. This initializes an Employee object with an id value, name value, department value,
+    // and salary value.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act. This retrieves the id value from the Employee object and stores it inside the id
+    // variable.
+    int id = employee.getId();
+
+    // Assert. This checks if the id value that we retrieved from Employee is equal to 1.
+    assertThat(id).isEqualTo(5);
+  }
+
+  @Test
+  public void setId() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    employee.setId(5);
+
+    // Assert.
+    assertThat(employee.getId()).isEqualTo(5);
+  }
+
+  @Test
+  public void getName() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    String name = employee.getName();
+
+    // Assert.
+    assertThat(name).isEqualTo("John Bey");
+  }
+
+  @Test
+  public void setName() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    employee.setName("John Bey");
+
+    // Assert.
+    assertThat(employee.getName()).isEqualTo("John Bey");
+  }
+
+  @Test
+  public void getDepartment() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    String department = employee.getDepartment();
+
+    // Assert.
+    assertThat(department).isEqualTo("Software Engineering");
+  }
+
+  @Test
+  public void setDepartment() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    employee.setDepartment("Software Engineering");
+
+    // Assert.
+    assertThat(employee.getDepartment()).isEqualTo("Software Engineering");
+  }
+
+  @Test
+  public void getSalary() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    double salary = employee.getSalary();
+
+    // Assert.
+    assertThat(salary).isEqualTo(200000.0);
+  }
+
+  @Test
+  public void setSalary() {
+    // Arrange.
+    Employee employee = new Employee(5, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    employee.setSalary(200000.0);
+
+    // Assert.
+    assertThat(employee.getSalary()).isEqualTo(200000.0);
+  }
+
+  @Test
+  public void testGetDetails() {
+    // Arrange.
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    String result = employee.getDetails();
+
+    // Assert.
+    String expected =
+        "The Employee's ID: 1 Name: John Bey Department: Software Engineering Salary: 200000.0";
+    assertThat(result).isEqualTo(expected);
+  }
+
+  @Test
+  public void testSetDetails() {
+    // Arrange.
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+
+    // Act.
+    employee.setId(1);
+    employee.setName("John Bey");
+    employee.setDepartment("Software Engineering");
+    employee.setSalary(200000.0);
+
+    // Assert.
+    String expected =
+        "The Employee's ID: 1 Name: John Bey Department: Software Engineering Salary: 200000.0";
+    assertThat(employee.getDetails()).isEqualTo(expected);
+  }
+
+  // Now it's time for us to test the EmployeeManager class. We will be testing the addEmployee,
+  // getEmployee, updateEmployee, removeEmployee, and getEmployeeCount methods.
+
+  @Test
+  public void testAddEmployee() {
+    // Arrange.
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+
+    // Act. Puts the employee object into the employeeManager.
+    employeeManager.addEmployee(employee);
+
+    // Assert.
+    assertThat(employeeManager.getEmployeeCount()).isEqualTo(1);
+  }
+
+  @Test
+  public void testGetEmployee() {
+    // Arrange.
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+    employeeManager.addEmployee(employee);
+
+    // Act.
+    Employee retrievedEmployee = employeeManager.getEmployee(1);
+
+    // Assert.
+    assertThat(retrievedEmployee).isEqualTo(employee);
+  }
+
+  @Test
+  public void testUpdateEmployee() {
+    // Arrange.
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+    employeeManager.addEmployee(employee);
+    Employee updatedEmployee = new Employee(1, "John Doe", "Software Engineering", 250000.0);
+
+    // Act.
+    employeeManager.updateEmployee(updatedEmployee);
+
+    // Assert.
+    assertThat(employeeManager.getEmployee(1).getName()).isEqualTo("John Doe");
+  }
+
+  @Test
+  public void testRemoveEmployee() {
+    // Arrange.
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+    employeeManager.addEmployee(employee);
+
+    // Act.
+    employeeManager.removeEmployee(1);
+
+    // Assert.
+    assertThat(employeeManager.getEmployeeCount()).isEqualTo(0);
+  }
+
+  @Test
+  public void testGetEmployeeCount() {
+    // Arrange.
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee1 = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+    Employee employee2 = new Employee(2, "Jane Doe", "Marketing", 150000.0);
+    employeeManager.addEmployee(employee1);
+    employeeManager.addEmployee(employee2);
+
+    // Act.
+    int count = employeeManager.getEmployeeCount();
+
+    // Assert.
+    assertThat(count).isEqualTo(2);
+  }
+
+  @Test
+  public void testAssertEmployeeInCollection() {
+    // Arrange.
+    EmployeeManager employeeManager = new EmployeeManager();
+    Employee employee = new Employee(1, "John Bey", "Software Engineering", 200000.0);
+    employeeManager.addEmployee(employee);
+
+    // Act & Assert.
+    assertThat(employeeManager.getEmployee(1)).isEqualTo(employee);
+  }
 }