Feat: create student

app/main/tv/codely/app/mooc/controller/students/Request.java

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+package tv.codely.app.mooc.controller.students;
+
+public class Request {
+    private String name;
+    private String surname;
+
+    public String name() {
+        return name;
+    }
+
+    public String surname() {
+        return surname;
+    }
+
+    public void setSurname(String surname) {
+        this.surname = surname;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

app/main/tv/codely/app/mooc/controller/students/StudentsPutController.java

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+package tv.codely.app.mooc.controller.students;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+import tv.codely.mooc.students.application.create.StudentCreator;
+
+@RestController
+public class StudentsPutController {
+
+    private final StudentCreator creator;
+
+    public StudentsPutController(StudentCreator creator) {
+        this.creator = creator;
+    }
+
+    @PutMapping("/students/{id}")
+    public ResponseEntity<?> create(@PathVariable String id, @RequestBody Request request) {
+        creator.create(id, request.name(), request.surname());
+
+        return new ResponseEntity<>(HttpStatus.CREATED);
+    }
+}

app/test/tv/codely/app/mooc/controller/students/StudentsPutControllerShould.java

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+package tv.codely.app.mooc.controller.students;
+
+import org.junit.jupiter.api.Test;
+import tv.codely.app.mooc.controller.RequestTestCase;
+
+public class StudentsPutControllerShould extends RequestTestCase {
+
+    @Test
+    public void create_a_valid_non_existing_student() throws Exception {
+        assertRequestWithBody(
+            "PUT",
+            "/students/1aab45ba-3c7a-4344-8936-78466eca77fa",
+            "{\"name\": \"The best student\", \"lastname\": \"The best lastname\"}",
+            201);
+    }
+
+}

src/mooc/main/tv/codely/mooc/students/application/create/StudentCreator.java

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+package tv.codely.mooc.students.application.create;
+
+import tv.codely.mooc.students.domain.Student;
+import tv.codely.mooc.students.domain.StudentRepository;
+import tv.codely.shared.domain.Service;
+
+@Service
+public class StudentCreator {
+    private final StudentRepository repository;
+
+    public StudentCreator(StudentRepository repository) {
+        this.repository = repository;
+    }
+
+    public void create(String id, String name, String surname) {
+        repository.save(new Student(id, name, surname));
+    }
+}

src/mooc/main/tv/codely/mooc/students/domain/Student.java

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+package tv.codely.mooc.students.domain;
+
+public class Student {
+    private String id;
+    private String name;
+    private String surname;
+
+    public Student(String id, String name, String surname) {
+        this.id = id;
+        this.name = name;
+        this.surname = surname;
+    }
+
+    public String id() {
+        return id;
+    }
+
+    public String name() {
+        return name;
+    }
+
+    public String surname() {
+        return surname;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Student)) return false;
+
+        Student student = (Student) o;
+
+        return id.equals(student.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return id.hashCode();
+    }
+}

src/mooc/main/tv/codely/mooc/students/domain/StudentRepository.java

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+package tv.codely.mooc.students.domain;
+
+import java.util.Optional;
+
+public interface StudentRepository {
+    void save(Student student);
+
+    Optional<Student> search(String id);
+}

src/mooc/main/tv/codely/mooc/students/infrastructure/persistence/InMemoryStudentRepository.java

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+package tv.codely.mooc.students.infrastructure.persistence;
+
+import tv.codely.mooc.students.domain.Student;
+import tv.codely.mooc.students.domain.StudentRepository;
+import tv.codely.shared.domain.Service;
+
+import java.util.HashMap;
+import java.util.Optional;
+
+@Service
+public class InMemoryStudentRepository implements StudentRepository {
+    private final HashMap<String, Student> students = new HashMap<>();
+
+    public void save(Student student) {
+        students.put(student.id(), student);
+    }
+
+    @Override
+    public Optional<Student> search(String id) {
+        return Optional.ofNullable(students.get(id));
+    }
+}

src/mooc/test/tv/codely/mooc/students/application/create/StudentCreatorTest.java

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+package tv.codely.mooc.students.application.create;
+
+import org.junit.jupiter.api.Test;
+import tv.codely.mooc.students.domain.Student;
+import tv.codely.mooc.students.domain.StudentRepository;
+
+import static org.mockito.Mockito.*;
+public class StudentCreatorTest {
+
+    @Test
+    public void create_a_valid_student() {
+        StudentRepository repository = mock(StudentRepository.class);
+        StudentCreator creator = new StudentCreator(repository);
+
+        String id = "some-id";
+        String name = "name";
+        String surname = "surname";
+
+        Student student = new Student(id, name, surname);
+
+        creator.create(student.id(), student.name(), student.surname());
+
+        verify(repository, atLeastOnce()).save(student);
+    }
+
+}

src/mooc/test/tv/codely/mooc/students/infrastructure/persistence/InMemoryStudentRepositoryTest.java

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+package tv.codely.mooc.students.infrastructure.persistence;
+
+import org.junit.jupiter.api.Test;
+import tv.codely.mooc.students.domain.Student;
+
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class InMemoryStudentRepositoryTest {
+
+    @Test
+    void save_a_student() {
+        InMemoryStudentRepository repository = new InMemoryStudentRepository();
+        Student student = new Student("id", "name", "surname");
+
+        repository.save(student);
+    }
+
+    @Test
+    void return_an_existing_student() {
+        InMemoryStudentRepository repository = new InMemoryStudentRepository();
+        Student student = new Student("id", "name", "surname");
+
+        repository.save(student);
+
+        assertEquals(Optional.of(student), repository.search(student.id()));
+    }
+
+    @Test
+    void not_return_a_non_existing_student() {
+        InMemoryStudentRepository repository = new InMemoryStudentRepository();
+
+        assertFalse(repository.search("randomId").isPresent());
+    }
+}