Spring Boot Unit Testing Support - 1

 

 

 

Maven 종속성 추가

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

JUnit 5가 포함되어있어서 자유롭게 사용할 수 있습니다.

JUnit 5

 

test 패키지 추가

main 의 패키지와 test 의 패키지 경로가 다르다면

test 클래스에서 @SpringBootTest 애노테이션의 classes 파라미터를 통해

메인의 부트 실행 클래스를 명시

@SpringBootTest(classes = MvcTestingExampleApplication.class)

 

---

 

application.properties 파일 읽기

@SpringBootTest(classes = MvcTestingExampleApplication.class)
public class ApplicationExampleTest {

    private static int count =0;

    @Value("${info.app.name}")
    private String appInfo;

    @Value("${info.app.description}")
    private String appDescription;

    @Value("${info.school.name}")
    private String schoolName;

    @Value("${info.app.version}")
    private String appVersion;
    
    ...

 

application.properties

info.school.name=luv2code
info.app.name=My Super Cool Gradebook
info.app.description=a fun way to track student grades!
info.app.version=1.0.0

 

 

테스트 코드에 Spring Beans 주입

 

Interface Student

public interface Student {
    String studentInformation();
    String getFullName();
}

 

 

@Component 를 통해 빈 등록

@Component  
public class StudentGrades {

@Component
public class StudentGrades {

    List<Double> mathGradeResults;
    /*
     * CAN HAVE MULTIPLE DIFFERENT TYPES OF GRADES
     * FOR 2.x WE WILL ONLY HAVE A MATH GRADE
     *  */

    public StudentGrades() {
    }

    public StudentGrades(List<Double> mathGradeResults) {
        this.mathGradeResults = mathGradeResults;
        /*
        Add other subject grades here in future lessons
        */
    }

        /*
        Add other subject grades here in future lessons
        */

    public double addGradeResultsForSingleClass(List<Double> grades) {
        double result = 0;
        for (double i : grades) {
            result += i;
        }
        return result;
    }

    public double findGradePointAverage (List<Double> grades ) {
        int lengthOfGrades = grades.size();
        double sum = addGradeResultsForSingleClass(grades);
        double result = sum / lengthOfGrades;

        // add a round function
        BigDecimal resultRound = BigDecimal.valueOf(result);
        resultRound = resultRound.setScale(2, RoundingMode.HALF_UP);
        return resultRound.doubleValue();

    }

    public Boolean isGradeGreater(double gradeOne, double gradeTwo) {
        if (gradeOne > gradeTwo) {
            return true;
        }
        return false;
    }

    public Object checkNull(Object obj) {
        if ( obj != null ) {
            return obj;
        }
        return null;
    }

    public List<Double> getMathGradeResults() {
        return mathGradeResults;
    }

    public void setMathGradeResults(List<Double> mathGradeResults) {
        this.mathGradeResults = mathGradeResults;
    }

    @Override
    public String toString() {
        return "StudentGrades{" +
                "mathGradeResults=" + mathGradeResults +
                '}';
    }
}

 

 

CollegeStudent

public class CollegeStudent implements Student {
    private String firstname;
    private String lastname;
    private String emailAddress;
    private StudentGrades studentGrades;

    public CollegeStudent() {
    }

    public CollegeStudent(String firstname, String lastname, String emailAddress) {
        this.firstname = firstname;
        this.lastname = lastname;
        this.emailAddress = emailAddress;
    }

    public String getFirstname() {
        return firstname;
    }

    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }

    public String getLastname() {
        return lastname;
    }

    public void setLastname(String lastname) {
        this.lastname = lastname;
    }

    public String getEmailAddress() {
        return emailAddress;
    }

    public void setEmailAddress(String emailAddress) {
        this.emailAddress = emailAddress;
    }

    public StudentGrades getStudentGrades() {
        return studentGrades;
    }

    public void setStudentGrades(StudentGrades studentGrades) {
        this.studentGrades = studentGrades;
    }

    @Override
    public String toString() {
        return "CollegeStudent{" +
                "firstname='" + firstname + '\'' +
                ", lastname='" + lastname + '\'' +
                ", emailAddress='" + emailAddress + '\'' +
                ", studentGrades=" + studentGrades +
                '}';
    }

    @Override
    public String studentInformation() {
        return getFullName() + " " + getEmailAddress();
    }

    @Override
    public String getFullName() {
        return getFirstname() + " " + getLastname();
    }
}

 

 

메인 클래스

@SpringBootApplication
public class MvcTestingExampleApplication {

	public static void main(String[] args) {
		SpringApplication.run(MvcTestingExampleApplication.class, args);
	}

	@Bean(name = "collegeStudent")
	@Scope(value = "prototype")
	CollegeStudent getCollegeStudent() {
		return new CollegeStudent();
	}

}

@Scope(value = "prototype") : 싱글톤이 아니라 인스턴스를 새로 생성할 수 있게 함.

 

 

 

 

최종 ApplicationExampleTest.java

(test 패키지)

@SpringBootTest(classes = MvcTestingExampleApplication.class)
public class ApplicationExampleTest {

    private static int count =0;

    @Value("${info.app.name}")
    private String appInfo;

    @Value("${info.app.description}")
    private String appDescription;

    @Value("${info.school.name}")
    private String schoolName;

    @Value("${info.app.version}")
    private String appVersion;

    @Autowired
    CollegeStudent student;

    @Autowired
    StudentGrades studentGrades;

    @BeforeEach
    public void beforeEach(){
        count++;

        System.out.println("Testing: "+appInfo + " which is "
        + appDescription+ " , Version : "+appVersion+", Execution of test method " +count);;

        student.setFirstname("jav");
        student.setLastname("app");
        student.setEmailAddress("javapp@tistory.com");

        studentGrades.setMathGradeResults(new ArrayList<>(Arrays.asList(100.0, 85.5, 76.5,91.75)));
        student.setStudentGrades(studentGrades);
    }

    @Test
    void basicTest(){}

}

@Autowired 를 통해 빈 주입

 

 

---

 

 

프로토타입 Beans

 

        CollegeStudent studentTwo = context.getBean("collegeStudent", CollegeStudent.class);

>> 메인 클래스에서 "collegeStudent" 이름으로 @Bean 을 통해 객체를 IoC에 등록

@SpringBootTest(classes = MvcTestingExampleApplication.class)
public class ApplicationExampleTest {

	...
    
    @Autowired
    ApplicationContext context;

    @DisplayName("grade 값 없이 학생 생성")
    @Test
    public void createStudentWithOutGradesInit()
    {
        CollegeStudent studentTwo = context.getBean("collegeStudent", CollegeStudent.class);
        studentTwo.setFirstname("java");
        studentTwo.setLastname("pp");
        studentTwo.setEmailAddress("javapp@tistory.com");

        assertNotNull(studentTwo.getFirstname());
        assertNotNull(studentTwo.getLastname());
        assertNotNull(studentTwo.getEmailAddress());
        assertNull(studentGrades.checkNull(studentTwo.getStudentGrades()));
    }

    @DisplayName("학생 인스턴스 프로토타입 검증")
    @Test
    public void verifyStudentsArePrototypes(){
        CollegeStudent studentTwo = context.getBean("collegeStudent",CollegeStudent.class);
        assertNotSame(student, studentTwo);
    }


    @DisplayName("성적의 결과와 평균 찾기")
    @Test
    public void findGradePointAverage()
    {
        assertAll("람다식으로 여러 개의 테스트 실행",
                ()-> assertEquals(300, studentGrades.addGradeResultsForSingleClass(
                        student.getStudentGrades().getMathGradeResults())),
                ()-> assertEquals(89,studentGrades.findGradePointAverage(
                        student.getStudentGrades().getMathGradeResults()
                ))
        );
    }
}