refactor: fixed getDetails method in Employee class

Author: TatsuyaRyujin

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

@@ -47,6 +47,6 @@ public void setSalary(double salary) {
   }
 
   public String getDetails() {
-    return "ID: " + this.id + " Name: " + this.name + " Department: " + this.department + " Salary " + this.salary; 
+    return "ID: " + id + " Name: " + name + " Department: " + department + " Salary " + salary;
   }
 }

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

@@ -2,6 +2,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import org.junit.jupiter.api.Test;
 
 class Lesson15Test {
@@ -123,6 +124,15 @@ public void testGetEmplopyeeCount() {
   public void testGetDetails() {
     Employee employee1 = new Employee(2004, "Edmar", "Tech", 60000.0);
 
-    assertEquals("ID: " + employee1.getId() + " Name: " + employee1.getName() + " Department: " + employee1.getDepartment() + " Salary " + employee1.getSalary(), employee1.getDetails());
+    assertEquals(
+        "ID: "
+            + employee1.getId()
+            + " Name: "
+            + employee1.getName()
+            + " Department: "
+            + employee1.getDepartment()
+            + " Salary "
+            + employee1.getSalary(),
+        employee1.getDetails());
   }
 }