added tests to student package

src/test/java/com/example/demo/DemoApplicationTests.java

@@ -1,13 +1,5 @@
-package com.example.demo;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class DemoApplicationTests {
-
-	@Test
-	void contextLoads() {
-	}
-
-}
+package com.example.demo;
+
+//@SpringBootTest
+class DemoApplicationTests {
+}

src/test/java/com/example/demo/student/StudentRepositoryTest.java

@@ -0,0 +1,53 @@
+package com.example.demo.student;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+@DataJpaTest
+class StudentRepositoryTest {
+
+    @Autowired
+    private StudentRepository underTest;
+
+    @AfterEach
+    void tearDown() {
+        underTest.deleteAll();
+    }
+
+    @Test
+    void itShouldCheckIfStudentEmailExists() {
+        // given
+        String email = "[email protected]";
+        Student student = new Student(
+                "Mike",
+                email,
+                Gender.MALE
+        );
+        underTest.save(student);
+
+        // when
+        Boolean expected = underTest.selectExistsEmail(email);
+
+        // then
+        assertThat(expected).isTrue();
+    }
+
+    @Test
+    void itShouldCheckIfStudentEmailDoesNotExist() {
+        // given
+        String email = "[email protected]";
+
+        // when
+        Boolean expected = underTest.selectExistsEmail(email);
+
+
+        // then
+        assertThat(expected).isFalse();
+    }
+}

src/test/java/com/example/demo/student/StudentServiceTest.java

@@ -0,0 +1,83 @@
+package com.example.demo.student;
+
+import com.example.demo.student.exception.BadRequestException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class StudentServiceTest {
+
+    @Mock
+    private StudentRepository studentRepository;
+    private StudentService underTest;
+
+    @BeforeEach
+    void setUp() {
+        underTest = new StudentService(studentRepository);
+    }
+
+    @Test
+    void canGetAllStudents() {
+        // when
+        underTest.getAllStudents();
+        // then
+        verify(studentRepository).findAll();
+    }
+
+    @Test
+    void canAddStudent() {
+        // given
+        Student student = new Student(
+                "Mike",
+                "[email protected]",
+                Gender.MALE
+        );
+        // when
+        underTest.addStudent(student);
+        // then
+        ArgumentCaptor<Student> studentArgumentCaptor =
+                ArgumentCaptor.forClass(Student.class);
+        verify(studentRepository)
+                .save(studentArgumentCaptor.capture());
+
+        Student capturedStudent = studentArgumentCaptor.getValue();
+        assertThat(capturedStudent).isEqualTo(student);
+    }
+
+    @Test
+    void willThrowWhenEmailIsTaken() {
+        // given
+        Student student = new Student(
+                "Mike",
+                "[email protected]",
+                Gender.MALE
+        );
+        given(studentRepository.selectExistsEmail(student.getEmail()))
+                .willReturn(true);
+
+        // when
+        // then
+        assertThatThrownBy(() -> underTest.addStudent(student))
+                .isInstanceOf(BadRequestException.class)
+                .hasMessageContaining("Email " + student.getEmail() + " taken");
+        verify(studentRepository, never()).save(any());
+    }
+
+    @Test
+    @Disabled
+    void canDeleteStudent() {
+
+    }
+}

src/test/resources/application.properties

@@ -0,0 +1,8 @@
+spring.datasource.url=jdbc:h2://mem:db;DB_CLOSE_DELAY=-1
+spring.datasource.username=sa
+spring.datasource.password=sa
+spring.datasource.driver-class-name=org.h2.Driver
+spring.jpa.hibernate.ddl-auto=create-drop
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgresSQLDialect
+spring.jpa.properties.hibernate.format_sql=true