Implementing CourseMapperTest

application/module-language-school/src/test/java/org/fuseri/modulelanguageschool/course/CourseMapperTest.java

+package org.fuseri.modulelanguageschool.course;
+
+import org.fuseri.model.dto.course.CourseCreateDto;
+import org.fuseri.model.dto.course.CourseDto;
+import org.fuseri.model.dto.course.LanguageTypeDto;
+import org.fuseri.model.dto.course.ProficiencyLevelDto;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.data.domain.PageRequest;
+
+import java.util.Collections;
+import java.util.List;
+
+@SpringBootTest
+final class CourseMapperTest {
+
+        private final CourseDto courseDto = new CourseDto("AJ1", 10,
+                LanguageTypeDto.ENGLISH, ProficiencyLevelDto.A1);
+        private final CourseCreateDto courseCreateDto = new CourseCreateDto("AJ1", 10,
+            LanguageTypeDto.ENGLISH, ProficiencyLevelDto.A1);
+        private final Course course = new Course("AJ1", 10,
+                Language.ENGLISH, ProficiencyLevel.A1, null);
+        @Autowired
+        private CourseMapper CourseMapper;
+
+        @Test
+        void mapNullToDto() {
+            var createdDto = CourseMapper.mapToDto(null);
+
+            Assertions.assertNull(createdDto);
+        }
+
+        @Test
+        void mapToDto() {
+            var createdDto = CourseMapper.mapToDto(course);
+
+            Assertions.assertEquals(courseDto.getId(), createdDto.getId());
+            Assertions.assertEquals(courseDto.getName(), createdDto.getName());
+            Assertions.assertEquals(courseDto.getCapacity(), createdDto.getCapacity());
+            Assertions.assertEquals(courseDto.getLanguage(), createdDto.getLanguage());
+            Assertions.assertEquals(courseDto.getProficiency(), createdDto.getProficiency());
+            Assertions.assertEquals(courseDto.getStudentIds(), createdDto.getStudentIds());
+        }
+
+        @Test
+        void mapNullToCourseCourseDto() {
+            var createdCourse = CourseMapper.mapToCourse((CourseDto) null);
+
+            Assertions.assertNull(createdCourse);
+        }
+
+        @Test
+        void mapToCourseCourseDto() {
+            var createdCourse = CourseMapper.mapToCourse(courseDto);
+
+            Assertions.assertEquals(course.getId(), createdCourse.getId());
+            Assertions.assertEquals(course.getName(), createdCourse.getName());
+            Assertions.assertEquals(course.getCapacity(), createdCourse.getCapacity());
+            Assertions.assertEquals(course.getStudents(), createdCourse.getStudents());
+            Assertions.assertEquals(course.getProficiency(), createdCourse.getProficiency());
+            Assertions.assertEquals(course.getLanguage(), createdCourse.getLanguage());
+        }
+
+        @Test
+        void mapNullToList() {
+            var courseDtos = CourseMapper.mapToList(null);
+
+            Assertions.assertNull(courseDtos);
+        }
+
+        @Test
+        void mapToEmptyList() {
+            var courseDtos = CourseMapper.mapToList(Collections.emptyList());
+
+            Assertions.assertEquals(courseDtos.size(), 0);
+        }
+
+        @Test
+        void mapToList() {
+            var courseDtos = CourseMapper.mapToList(Collections.singletonList(course));
+
+            Assertions.assertEquals(courseDtos.size(), 1);
+
+
+            Assertions.assertEquals(courseDto.getId(), courseDtos.get(0).getId());
+            Assertions.assertEquals(courseDto.getName(), courseDtos.get(0).getName());
+            Assertions.assertEquals(courseDto.getCapacity(), courseDtos.get(0).getCapacity());
+            Assertions.assertEquals(courseDto.getLanguage(), courseDtos.get(0).getLanguage());
+            Assertions.assertEquals(courseDto.getProficiency(), courseDtos.get(0).getProficiency());
+            Assertions.assertEquals(courseDto.getStudentIds(), courseDtos.get(0).getStudentIds());
+        }
+
+        @Test
+        void mapToEmptyPageDto() {
+            Page<CourseDto> pageDto = CourseMapper.mapToPageDto(Page.empty());
+
+            Assertions.assertEquals(1, pageDto.getTotalPages());
+        }
+
+        @Test
+        void mapToPageDto() {
+            List<Course> courses = List.of(course);
+            Page<Course> page = new PageImpl<>(courses, PageRequest.of(0, 1), courses.size());
+            Page<CourseDto> pageDto = CourseMapper.mapToPageDto(page);
+
+            Assertions.assertEquals(page.getTotalPages(), pageDto.getTotalPages());
+            Assertions.assertEquals(page.getNumber(), pageDto.getNumber());
+            Assertions.assertEquals(page.getNumberOfElements(), pageDto.getNumberOfElements());
+            Assertions.assertEquals(page.getSize(), pageDto.getSize());
+            Assertions.assertEquals(page.getTotalElements(), pageDto.getTotalElements());
+
+            Assertions.assertEquals(courseDto.getId(), pageDto.getContent().get(0).getId());
+            Assertions.assertEquals(courseDto.getName(), pageDto.getContent().get(0).getName());
+            Assertions.assertEquals(courseDto.getCapacity(), pageDto.getContent().get(0).getCapacity());
+            Assertions.assertEquals(courseDto.getLanguage(), pageDto.getContent().get(0).getLanguage());
+            Assertions.assertEquals(courseDto.getProficiency(), pageDto.getContent().get(0).getProficiency());
+            Assertions.assertEquals(courseDto.getStudentIds(), pageDto.getContent().get(0).getStudentIds());
+        }
+
+    @Test
+    void mapNullToCourseCourseCreateDto() {
+        var createdCourse = CourseMapper.mapToCourse((CourseCreateDto) null);
+
+        Assertions.assertNull(createdCourse);
+    }
+
+    @Test
+    void mapToCourseCourseCreateDto() {
+        var createdCourse = CourseMapper.mapToCourse(courseCreateDto);
+
+        Assertions.assertEquals(course.getId(), createdCourse.getId());
+        Assertions.assertEquals(course.getName(), createdCourse.getName());
+        Assertions.assertEquals(course.getCapacity(), createdCourse.getCapacity());
+        Assertions.assertEquals(course.getStudents(), createdCourse.getStudents());
+        Assertions.assertEquals(course.getProficiency(), createdCourse.getProficiency());
+        Assertions.assertEquals(course.getLanguage(), createdCourse.getLanguage());
+    }
+    
+}