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feat: adds lesson16 homework by Yemi (#515)
* feat: adds lesson16 homework by Yemi * feat: adds lesson16 homework by Yemi * feat:adds new package name for lesson16 homework by Yemi * feat:adds new package name for lesson16 homework by Yemi
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‎lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/studentinfo/Department.java

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package com.codedifferently.lesson16.studentinfo;
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public enum Department {
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Sales,
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Finance,
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Technology,
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Research,
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Administration
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}

‎lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/studentinfo/Student.java

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package com.codedifferently.lesson16.studentinfo;
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import java.time.LocalDate;
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import java.util.List;
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public class Student {
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private long studentNumber;
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private String fullName;
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private Department department;
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private String emailAddress;
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private List<String> phoneNumbers;
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private LocalDate dateOfBirth;
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public Student(
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long studentNumber,
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String fullName,
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Department department,
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String emailAddress,
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List<String> phoneNumbers,
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LocalDate dateOfBirth) {
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this.studentNumber = studentNumber;
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this.fullName = fullName;
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this.department = department;
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this.emailAddress = emailAddress;
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this.phoneNumbers = phoneNumbers;
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this.dateOfBirth = dateOfBirth;
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}
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public long getStudentNumber() {
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return studentNumber;
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}
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public void setStudentNumber(long studentNumber) {
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this.studentNumber = studentNumber;
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}
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public String getFullName() {
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return fullName;
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}
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public void setFullName(String fullName) {
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this.fullName = fullName;
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}
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public Department getDepartment() {
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return department;
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}
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public void setDepartment(Department department) {
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this.department = department;
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}
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public String getEmailAddress() {
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return emailAddress;
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}
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public void setEmailAddress(String emailAddress) {
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this.emailAddress = emailAddress;
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}
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public List<String> getPhoneNumbers() {
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return phoneNumbers;
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}
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public void setPhoneNumbers(List<String> phoneNumbers) {
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this.phoneNumbers = phoneNumbers;
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}
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public LocalDate getDateOfBirth() {
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return dateOfBirth;
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}
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public void setDateOfBirth(LocalDate dateOfBirth) {
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this.dateOfBirth = dateOfBirth;
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}
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@Override
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public String toString() {
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return "Student{"
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+ "studentNumber="
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+ studentNumber
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+ ", fullName='"
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+ fullName
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+ '\''
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+ ", department="
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+ department
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+ ", emailAddress='"
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+ emailAddress
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+ '\''
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+ ", phoneNumbers="
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+ phoneNumbers
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+ ", dateOfBirth="
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+ dateOfBirth
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+ '}';
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}
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}

‎lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/studentinfo/StudentNotFoundException.java

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package com.codedifferently.lesson16.studentinfo;
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public class StudentNotFoundException extends RuntimeException {
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public StudentNotFoundException(String message) {
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super(message);
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}
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}

‎lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/studentinfo/StudentService.java

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package com.codedifferently.lesson16.studentinfo;
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import java.util.HashMap;
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import java.util.Map;
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public class StudentService {
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private final Map<Long, Student> students;
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public StudentService() {
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students = new HashMap<>();
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}
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private void checkIfStudentExist(long studentNumber) {
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if (students.containsKey(studentNumber)) {
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return;
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}
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throw new StudentNotFoundException("Student with number " + studentNumber + " not found");
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}
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public void deleteStudent(long studentNumber) {
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checkIfStudentExist(studentNumber);
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students.remove(studentNumber);
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}
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public void addStudent(Student student) {
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students.put(student.getStudentNumber(), student);
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}
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public int countNumberOfTechDeptStudents() {
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int count = 0;
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for (Student student : students.values()) {
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if (student.getDepartment().equals(Department.Technology)) {
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count++;
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}
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}
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return count;
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}
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public Student findStudentByStudentNumber(long studentNumber) {
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return students.get(studentNumber);
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}
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}

‎lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/studentinfo/StudentServiceTest.java

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package com.codedifferently.lesson16.studentinfo;
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import static org.assertj.core.api.Assertions.assertThatThrownBy;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import java.time.LocalDate;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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public class StudentServiceTest {
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StudentService classUnderTest;
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Map<Long, Student> students;
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@BeforeEach
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public void setUp() {
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classUnderTest = new StudentService();
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students = new HashMap<>();
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List<String> phoneNumbers1 = new ArrayList<>();
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phoneNumbers1.add("301-999-3222");
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phoneNumbers1.add("301-211-3222");
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phoneNumbers1.add("301-212-3777");
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Student student1 =
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new Student(
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112453698l,
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"Jane Doe",
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Department.Finance,
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"[email protected]",
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phoneNumbers1,
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LocalDate.of(2021, 11, 20));
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List<String> phoneNumbers2 = new ArrayList<>();
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phoneNumbers2.add("301-777-3222");
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phoneNumbers2.add("301-777-3222");
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phoneNumbers2.add("301-777-3777");
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Student student2 =
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new Student(
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712453698l,
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"Johnie Walker",
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Department.Technology,
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"[email protected]",
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phoneNumbers2,
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LocalDate.of(2021, 10, 26));
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List<String> phoneNumbers3 = new ArrayList<>();
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phoneNumbers2.add("303-999-3222");
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phoneNumbers2.add("303-999-3222");
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phoneNumbers2.add("303-999-3777");
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Student student3 =
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new Student(
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912453698l,
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"Fannie May",
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Department.Technology,
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"[email protected]",
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phoneNumbers3,
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LocalDate.of(2017, 9, 26));
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students.put(112453698l, student1);
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students.put(712453698l, student2);
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students.put(912453698l, student3);
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classUnderTest.addStudent(student1);
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classUnderTest.addStudent(student2);
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classUnderTest.addStudent(student3);
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}
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@Test
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public void testDeleteStudent_throw_Exception_IFNumber_Not_Found() {
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// Arrange
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Student student =
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new Student(
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44444444l,
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"Gonnie ByeBye",
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Department.Technology,
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"[email protected]",
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null,
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LocalDate.of(2019, 10, 21));
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classUnderTest.addStudent(student);
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// Act
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classUnderTest.deleteStudent(student.getStudentNumber());
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// Assert
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long studentNumber = 44444444l;
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assertThatThrownBy(() -> classUnderTest.deleteStudent(studentNumber))
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.isInstanceOf(StudentNotFoundException.class)
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.hasMessage("Student with number " + studentNumber + " not found");
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}
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@Test
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public void testCountNumberOfTechDeptStudents_if_any() {
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Student student =
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new Student(
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44444444l,
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"Gonnie ByeBye",
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Department.Technology,
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"[email protected]",
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null,
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LocalDate.of(2019, 10, 21));
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classUnderTest.addStudent(student);
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// Act
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int numOfTechStudents = classUnderTest.countNumberOfTechDeptStudents();
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// Assert
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int expectedCount = 3;
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assertEquals(expectedCount, numOfTechStudents);
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}
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@Test
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public void testAddStudent() {
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// Arrange
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Student student =
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new Student(
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44444444l,
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"Gonnie ByeBye",
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Department.Technology,
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"[email protected]",
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null,
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LocalDate.of(2019, 10, 21));
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// Act
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classUnderTest.addStudent(student);
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// Assert
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int expectedCount = 3;
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assertEquals(expectedCount, students.size());
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}
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@Test
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public void testFindStudentByStudentNumber_where_student_exist() {
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// Arrange
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Student student =
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new Student(
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44444444l,
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"Gonnie ByeBye",
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Department.Technology,
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"[email protected]",
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null,
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LocalDate.of(2019, 10, 21));
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classUnderTest.addStudent(student);
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// Act
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classUnderTest.findStudentByStudentNumber(student.getStudentNumber());
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// Assert
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long expectedStudentNumber = 44444444l;
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assertEquals(expectedStudentNumber, student.getStudentNumber());
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}
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}

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