jbdc hw templates added

2026-05-30 10:50:42 +00:00 · 2023-10-29 23:25:50 +04:00
parent 1a651d71b3
commit 0dade8ceb2
63 changed files with 1717 additions and 0 deletions
@@ -1,5 +1,6 @@
 *.iml
 .idea/
 target/
+spring-shell.log
 !**/src/main/**/target/
 !**/src/test/**/target/
@@ -0,0 +1,30 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+spring-shell.log
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.1.2</version>
+        <relativePath/>
+    </parent>
+
+    <groupId>ru.otus.hw</groupId>
+    <artifactId>hw05-jdbc</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-jdbc-demo</name>
+
+    <properties>
+        <java.version>17</java.version>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <h2.version>2.2.220</h2.version>
+        <spring.shell.version>3.1.3</spring.shell.version>
+        <snakeyaml.version>2.0</snakeyaml.version>
+        <checkstyle-plugin.version>3.2.2</checkstyle-plugin.version>
+        <checkstyle.version>10.11.0</checkstyle.version>
+        <checkstyle.config.url>
+            https://raw.githubusercontent.com/OtusTeam/Spring/master/checkstyle.xml
+        </checkstyle.config.url>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jdbc</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.shell</groupId>
+            <artifactId>spring-shell-starter</artifactId>
+            <version>${spring.shell.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+            <version>${h2.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>${snakeyaml.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>${checkstyle-plugin.version}</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.puppycrawl.tools</groupId>
+                        <artifactId>checkstyle</artifactId>
+                        <version>${checkstyle.version}</version>
+                    </dependency>
+                </dependencies>
+                <configuration>
+                    <configLocation>${checkstyle.config.url}</configLocation>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
@@ -0,0 +1,13 @@
+package ru.otus.hw;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}
@@ -0,0 +1,25 @@
+package ru.otus.hw.commands;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import ru.otus.hw.converters.AuthorConverter;
+import ru.otus.hw.services.AuthorService;
+
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@ShellComponent
+public class AuthorCommands {
+
+    private final AuthorService authorService;
+
+    private final AuthorConverter authorConverter;
+
+    @ShellMethod(value = "Find all authors", key = "aa")
+    public String findAllAuthors() {
+        return authorService.findAll().stream()
+                .map(authorConverter::authorToString)
+                .collect(Collectors.joining("," + System.lineSeparator()));
+    }
+}
@@ -0,0 +1,52 @@
+package ru.otus.hw.commands;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import ru.otus.hw.converters.BookConverter;
+import ru.otus.hw.services.BookService;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@ShellComponent
+public class BookCommands {
+
+    private final BookService bookService;
+
+    private final BookConverter bookConverter;
+
+    @ShellMethod(value = "Find all books", key = "ab")
+    public String findAllBooks() {
+        return bookService.findAll().stream()
+                .map(bookConverter::bookToString)
+                .collect(Collectors.joining("," + System.lineSeparator()));
+    }
+
+    @ShellMethod(value = "Find book by id", key = "bbid")
+    public String findBookById(long id) {
+        return bookService.findById(id)
+                .map(bookConverter::bookToString)
+                .orElse("Book with id %d not found".formatted(id));
+    }
+
+    //bins aaaaaaaaaaaaa 1 1,6//bins aaaaaaaaaaaaa 1 1,6
+    @ShellMethod(value = "Insert book", key = "bins")
+    public String insertBook(String title, long authorId, List<Long> genresIds) {
+        var savedBook = bookService.insert(title, authorId, genresIds);
+        return bookConverter.bookToString(savedBook);
+    }
+
+    //bupd 4 dfasdfasdfasd 3 2,5
+    @ShellMethod(value = "Update book", key = "bupd")
+    public String updateBook(long id, String title, long authorId, List<Long> genresIds) {
+        var savedBook = bookService.update(id, title, authorId, genresIds);
+        return bookConverter.bookToString(savedBook);
+    }
+
+    @ShellMethod(value = "Delete book by id", key = "bdel")
+    public void updateBook(long id) {
+        bookService.deleteById(id);
+    }
+}
@@ -0,0 +1,25 @@
+package ru.otus.hw.commands;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import ru.otus.hw.converters.GenreConverter;
+import ru.otus.hw.services.GenreService;
+
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@ShellComponent
+public class GenreCommands {
+
+    private final GenreService genreService;
+
+    private final GenreConverter genreConverter;
+
+    @ShellMethod(value = "Find all genres", key = "ag")
+    public String findAllGenres() {
+        return genreService.findAll().stream()
+                .map(genreConverter::genreToString)
+                .collect(Collectors.joining("," + System.lineSeparator()));
+    }
+}
@@ -0,0 +1,11 @@
+package ru.otus.hw.converters;
+
+import org.springframework.stereotype.Component;
+import ru.otus.hw.models.Author;
+
+@Component
+public class AuthorConverter {
+    public String authorToString(Author author) {
+        return "Id: %d, FullName: %s".formatted(author.getId(), author.getFullName());
+    }
+}
@@ -0,0 +1,27 @@
+package ru.otus.hw.converters;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import ru.otus.hw.models.Book;
+
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@Component
+public class BookConverter {
+    private final AuthorConverter authorConverter;
+
+    private final GenreConverter genreConverter;
+
+    public String bookToString(Book book) {
+        var genresString = book.getGenres().stream()
+                .map(genreConverter::genreToString)
+                .map("{%s}"::formatted)
+                .collect(Collectors.joining(", "));
+        return "Id: %d, title: %s, author: {%s}, genres: [%s]".formatted(
+                book.getId(),
+                book.getTitle(),
+                authorConverter.authorToString(book.getAuthor()),
+                genresString);
+    }
+}
@@ -0,0 +1,11 @@
+package ru.otus.hw.converters;
+
+import org.springframework.stereotype.Component;
+import ru.otus.hw.models.Genre;
+
+@Component
+public class GenreConverter {
+    public String genreToString(Genre genre) {
+        return "Id: %d, Name: %s".formatted(genre.getId(), genre.getName());
+    }
+}
@@ -0,0 +1,7 @@
+package ru.otus.hw.exceptions;
+
+public class EntityNotFoundException extends RuntimeException {
+    public EntityNotFoundException(String message) {
+        super(message);
+    }
+}
@@ -0,0 +1,14 @@
+package ru.otus.hw.models;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Author {
+    private long id;
+
+    private String fullName;
+}
@@ -0,0 +1,20 @@
+package ru.otus.hw.models;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Book {
+    private long id;
+
+    private String title;
+
+    private Author author;
+
+    private List<Genre> genres;
+}
@@ -0,0 +1,14 @@
+package ru.otus.hw.models;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Genre {
+    private long id;
+
+    private String name;
+}
@@ -0,0 +1,12 @@
+package ru.otus.hw.repositories;
+
+import ru.otus.hw.models.Author;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface AuthorRepository {
+    List<Author> findAll();
+
+    Optional<Author> findById(long id);
+}
@@ -0,0 +1,33 @@
+package ru.otus.hw.repositories;
+
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Repository;
+import ru.otus.hw.models.Author;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class AuthorRepositoryJdbc implements AuthorRepository {
+
+    @Override
+    public List<Author> findAll() {
+        return new ArrayList<>();
+    }
+
+    @Override
+    public Optional<Author> findById(long id) {
+        return Optional.empty();
+    }
+
+    private static class AuthorRowMapper implements RowMapper<Author> {
+
+        @Override
+        public Author mapRow(ResultSet rs, int i) throws SQLException {
+            return null;
+        }
+    }
+}
@@ -0,0 +1,16 @@
+package ru.otus.hw.repositories;
+
+import ru.otus.hw.models.Book;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface BookRepository {
+    Optional<Book> findById(long id);
+
+    List<Book> findAll();
+
+    Book save(Book book);
+
+    void deleteById(long id);
+}
@@ -0,0 +1,112 @@
+package ru.otus.hw.repositories;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.dao.DataAccessException;
+import org.springframework.jdbc.core.ResultSetExtractor;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.jdbc.support.GeneratedKeyHolder;
+import org.springframework.stereotype.Repository;
+import ru.otus.hw.models.Book;
+import ru.otus.hw.models.Genre;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+@RequiredArgsConstructor
+public class BookRepositoryJdbc implements BookRepository {
+
+    private final GenreRepository genreRepository;
+
+    @Override
+    public Optional<Book> findById(long id) {
+        return Optional.empty();
+    }
+
+    @Override
+    public List<Book> findAll() {
+        var genres = genreRepository.findAll();
+        var relations = getAllGenreRelations();
+        var books = getAllBooksWithoutGenres();
+        mergeBooksInfo(books, genres, relations);
+        return books;
+    }
+
+    @Override
+    public Book save(Book book) {
+        if (book.getId() == 0) {
+            return insert(book);
+        }
+        return update(book);
+    }
+
+    @Override
+    public void deleteById(long id) {
+        //...
+    }
+
+    private List<Book> getAllBooksWithoutGenres() {
+        return new ArrayList<>();
+    }
+
+    private List<BookGenreRelation> getAllGenreRelations() {
+        return new ArrayList<>();
+    }
+
+    private void mergeBooksInfo(List<Book> booksWithoutGenres, List<Genre> genres,
+                                List<BookGenreRelation> relations) {
+        // Добавить книгам (booksWithoutGenres) жанры (genres) в соответствии со связями (relations)
+    }
+
+    private Book insert(Book book) {
+        var keyHolder = new GeneratedKeyHolder();
+
+        //...
+
+        //noinspection DataFlowIssue
+        book.setId(keyHolder.getKeyAs(Long.class));
+        batchInsertGenresRelationsFor(book);
+        return book;
+    }
+
+    private Book update(Book book) {
+        //...
+
+        removeGenresRelationsFor(book);
+        batchInsertGenresRelationsFor(book);
+
+        return book;
+    }
+
+    private void batchInsertGenresRelationsFor(Book book) {
+        // batchUpdate
+    }
+
+    private void removeGenresRelationsFor(Book book) {
+        //...
+    }
+
+    private static class BookRowMapper implements RowMapper<Book> {
+
+        @Override
+        public Book mapRow(ResultSet rs, int rowNum) throws SQLException {
+            return null;
+        }
+    }
+
+    @SuppressWarnings("ClassCanBeRecord")
+    @RequiredArgsConstructor
+    private static class BookResultSetExtractor implements ResultSetExtractor<List<Book>> {
+
+        @Override
+        public List<Book> extractData(ResultSet rs) throws SQLException, DataAccessException {
+            return new ArrayList<>();
+        }
+    }
+
+    private record BookGenreRelation(long bookId, long genreId) {
+    }
+}
@@ -0,0 +1,11 @@
+package ru.otus.hw.repositories;
+
+import ru.otus.hw.models.Genre;
+
+import java.util.List;
+
+public interface GenreRepository {
+    List<Genre> findAll();
+
+    List<Genre> findAllByIds(List<Long> ids);
+}
@@ -0,0 +1,32 @@
+package ru.otus.hw.repositories;
+
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Repository;
+import ru.otus.hw.models.Genre;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+@Repository
+public class GenreRepositoryJdbc implements GenreRepository {
+
+    @Override
+    public List<Genre> findAll() {
+        return new ArrayList<>();
+    }
+
+    @Override
+    public List<Genre> findAllByIds(List<Long> ids) {
+        return new ArrayList<>();
+    }
+
+    private static class GnreRowMapper implements RowMapper<Genre> {
+
+        @Override
+        public Genre mapRow(ResultSet rs, int i) throws SQLException {
+            return null;
+        }
+    }
+}
@@ -0,0 +1,9 @@
+package ru.otus.hw.services;
+
+import ru.otus.hw.models.Author;
+
+import java.util.List;
+
+public interface AuthorService {
+    List<Author> findAll();
+}
@@ -0,0 +1,19 @@
+package ru.otus.hw.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.otus.hw.models.Author;
+import ru.otus.hw.repositories.AuthorRepository;
+
+import java.util.List;
+
+@RequiredArgsConstructor
+@Service
+public class AuthorServiceImpl implements AuthorService {
+    private final AuthorRepository authorRepository;
+
+    @Override
+    public List<Author> findAll() {
+        return authorRepository.findAll();
+    }
+}
@@ -0,0 +1,18 @@
+package ru.otus.hw.services;
+
+import ru.otus.hw.models.Book;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface BookService {
+    Optional<Book> findById(long id);
+
+    List<Book> findAll();
+
+    Book insert(String title, long authorId, List<Long> genresIds);
+
+    Book update(long id, String title, long authorId, List<Long> genresIds);
+
+    void deleteById(long id);
+}
@@ -0,0 +1,60 @@
+package ru.otus.hw.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.otus.hw.exceptions.EntityNotFoundException;
+import ru.otus.hw.models.Book;
+import ru.otus.hw.repositories.AuthorRepository;
+import ru.otus.hw.repositories.BookRepository;
+import ru.otus.hw.repositories.GenreRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+import static org.springframework.util.CollectionUtils.isEmpty;
+
+@RequiredArgsConstructor
+@Service
+public class BookServiceImpl implements BookService {
+    private final AuthorRepository authorRepository;
+
+    private final GenreRepository genreRepository;
+
+    private final BookRepository bookRepository;
+
+    @Override
+    public Optional<Book> findById(long id) {
+        return bookRepository.findById(id);
+    }
+
+    @Override
+    public List<Book> findAll() {
+        return bookRepository.findAll();
+    }
+
+    @Override
+    public Book insert(String title, long authorId, List<Long> genresIds) {
+        return save(0, title, authorId, genresIds);
+    }
+
+    @Override
+    public Book update(long id, String title, long authorId, List<Long> genresIds) {
+        return save(id, title, authorId, genresIds);
+    }
+
+    @Override
+    public void deleteById(long id) {
+        bookRepository.deleteById(id);
+    }
+
+    private Book save(long id, String title, long authorId, List<Long> genresIds) {
+        var author = authorRepository.findById(authorId)
+                .orElseThrow(() -> new EntityNotFoundException("Author with id %d not found".formatted(authorId)));
+        var genres = genreRepository.findAllByIds(genresIds);
+        if (isEmpty(genres)) {
+            throw new EntityNotFoundException("Genres with ids %s not found".formatted(genresIds));
+        }
+        var book = new Book(id, title, author, genres);
+        return bookRepository.save(book);
+    }
+}
@@ -0,0 +1,9 @@
+package ru.otus.hw.services;
+
+import ru.otus.hw.models.Genre;
+
+import java.util.List;
+
+public interface GenreService {
+    List<Genre> findAll();
+}
@@ -0,0 +1,19 @@
+package ru.otus.hw.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.otus.hw.models.Genre;
+import ru.otus.hw.repositories.GenreRepository;
+
+import java.util.List;
+
+@RequiredArgsConstructor
+@Service
+public class GenreServiceImpl implements GenreService {
+    private final GenreRepository genreRepository;
+
+    @Override
+    public List<Genre> findAll() {
+        return genreRepository.findAll();
+    }
+}
@@ -0,0 +1,8 @@
+spring:
+  datasource:
+    url: jdbc:h2:mem:maindb
+  sql:
+    init:
+      mode: always
+      data-locations: data.sql
+      schema-locations: schema.sql
@@ -0,0 +1,14 @@
+insert into authors(full_name)
+values ('Author_1'), ('Author_2'), ('Author_3');
+
+insert into genres(name)
+values ('Genre_1'), ('Genre_2'), ('Genre_3'),
+       ('Genre_4'), ('Genre_5'), ('Genre_6');
+
+insert into books(title, author_id)
+values ('BookTitle_1', 1), ('BookTitle_2', 2), ('BookTitle_3', 3);
+
+insert into books_genres(book_id, genre_id)
+values (1, 1),   (1, 2),
+       (2, 3),   (2, 4),
+       (3, 5),   (3, 6);
@@ -0,0 +1,24 @@
+create table authors (
+    id bigserial,
+    full_name varchar(255),
+    primary key (id)
+);
+
+create table genres (
+    id bigserial,
+    name varchar(255),
+    primary key (id)
+);
+
+create table books (
+    id bigserial,
+    title varchar(255),
+    author_id bigint references authors (id) on delete cascade,
+    primary key (id)
+);
+
+create table books_genres (
+    book_id bigint references books(id) on delete cascade,
+    genre_id bigint references genres(id) on delete cascade,
+    primary key (book_id, genre_id)
+);
@@ -0,0 +1,134 @@
+package ru.otus.hw.repositories;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.jdbc.JdbcTest;
+import org.springframework.context.annotation.Import;
+import ru.otus.hw.models.Author;
+import ru.otus.hw.models.Book;
+import ru.otus.hw.models.Genre;
+
+import java.util.List;
+import java.util.stream.IntStream;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Репозиторий на основе Jdbc для работы с книгами ")
+@JdbcTest
+@Import({BookRepositoryJdbc.class, GenreRepositoryJdbc.class})
+class BookRepositoryJdbcTest {
+
+    @Autowired
+    private BookRepositoryJdbc repositoryJdbc;
+
+    private List<Author> dbAuthors;
+
+    private List<Genre> dbGenres;
+
+    private List<Book> dbBooks;
+
+    @BeforeEach
+    void setUp() {
+        dbAuthors = getDbAuthors();
+        dbGenres = getDbGenres();
+        dbBooks = getDbBooks(dbAuthors, dbGenres);
+    }
+
+    @DisplayName("должен загружать книгу по id")
+    @ParameterizedTest
+    @MethodSource("getDbBooks")
+    void shouldReturnCorrectBookById(Book expectedBook) {
+        var actualBook = repositoryJdbc.findById(expectedBook.getId());
+        assertThat(actualBook).isPresent()
+                .get()
+                .isEqualTo(expectedBook);
+    }
+
+    @DisplayName("должен загружать список всех книг")
+    @Test
+    void shouldReturnCorrectBooksList() {
+        var actualBooks = repositoryJdbc.findAll();
+        var expectedBooks = dbBooks;
+
+        assertThat(actualBooks).containsExactlyElementsOf(expectedBooks);
+        actualBooks.forEach(System.out::println);
+    }
+
+    @DisplayName("должен сохранять новую книгу")
+    @Test
+    void shouldSaveNewBook() {
+        var expectedBook = new Book(0, "BookTitle_10500", dbAuthors.get(0),
+                List.of(dbGenres.get(0), dbGenres.get(2)));
+        var returnedBook = repositoryJdbc.save(expectedBook);
+        assertThat(returnedBook).isNotNull()
+                .matches(book -> book.getId() > 0)
+                .usingRecursiveComparison().ignoringExpectedNullFields().isEqualTo(expectedBook);
+
+        assertThat(repositoryJdbc.findById(returnedBook.getId()))
+                .isPresent()
+                .get()
+                .isEqualTo(returnedBook);
+    }
+
+    @DisplayName("должен сохранять измененную книгу")
+    @Test
+    void shouldSaveUpdatedBook() {
+        var expectedBook = new Book(1L, "BookTitle_10500", dbAuthors.get(2),
+                List.of(dbGenres.get(4), dbGenres.get(5)));
+
+        assertThat(repositoryJdbc.findById(expectedBook.getId()))
+                .isPresent()
+                .get()
+                .isNotEqualTo(expectedBook);
+
+        var returnedBook = repositoryJdbc.save(expectedBook);
+        assertThat(returnedBook).isNotNull()
+                .matches(book -> book.getId() > 0)
+                .usingRecursiveComparison().ignoringExpectedNullFields().isEqualTo(expectedBook);
+
+        assertThat(repositoryJdbc.findById(returnedBook.getId()))
+                .isPresent()
+                .get()
+                .isEqualTo(returnedBook);
+    }
+
+    @DisplayName("должен удалять книгу по id ")
+    @Test
+    void shouldDeleteBook() {
+        assertThat(repositoryJdbc.findById(1L)).isPresent();
+        repositoryJdbc.deleteById(1L);
+        assertThat(repositoryJdbc.findById(1L)).isEmpty();
+    }
+
+    private static List<Author> getDbAuthors() {
+        return IntStream.range(1, 4).boxed()
+                .map(id -> new Author(id, "Author_" + id))
+                .toList();
+    }
+
+    private static List<Genre> getDbGenres() {
+        return IntStream.range(1, 7).boxed()
+                .map(id -> new Genre(id, "Genre_" + id))
+                .toList();
+    }
+
+    private static List<Book> getDbBooks(List<Author> dbAuthors, List<Genre> dbGenres) {
+        return IntStream.range(1, 4).boxed()
+                .map(id -> new Book(id,
+                        "BookTitle_" + id,
+                        dbAuthors.get(id - 1),
+                        dbGenres.subList((id - 1) * 2, (id - 1) * 2 + 2)
+                ))
+                .toList();
+    }
+
+    private static List<Book> getDbBooks() {
+        var dbAuthors = getDbAuthors();
+        var dbGenres = getDbGenres();
+        return getDbBooks(dbAuthors, dbGenres);
+    }
+}
@@ -0,0 +1,8 @@
+spring:
+  datasource:
+    url: jdbc:h2:mem:testdb
+  sql:
+    init:
+      mode: always
+      data-locations: data.sql
+      schema-locations: schema.sql
@@ -0,0 +1,14 @@
+insert into authors(full_name)
+values ('Author_1'), ('Author_2'), ('Author_3');
+
+insert into genres(name)
+values ('Genre_1'), ('Genre_2'), ('Genre_3'),
+       ('Genre_4'), ('Genre_5'), ('Genre_6');
+
+insert into books(title, author_id)
+values ('BookTitle_1', 1), ('BookTitle_2', 2), ('BookTitle_3', 3);
+
+insert into books_genres(book_id, genre_id)
+values (1, 1),   (1, 2),
+       (2, 3),   (2, 4),
+       (3, 5),   (3, 6);
@@ -0,0 +1,30 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+spring-shell.log
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.1.2</version>
+        <relativePath/>
+    </parent>
+
+    <groupId>ru.otus.hw</groupId>
+    <artifactId>hw05-jdbc</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-jdbc-demo</name>
+
+    <properties>
+        <java.version>17</java.version>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <h2.version>2.2.220</h2.version>
+        <spring.shell.version>3.1.3</spring.shell.version>
+        <snakeyaml.version>2.0</snakeyaml.version>
+        <checkstyle-plugin.version>3.2.2</checkstyle-plugin.version>
+        <checkstyle.version>10.11.0</checkstyle.version>
+        <checkstyle.config.url>
+            https://raw.githubusercontent.com/OtusTeam/Spring/master/checkstyle.xml
+        </checkstyle.config.url>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jdbc</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.shell</groupId>
+            <artifactId>spring-shell-starter</artifactId>
+            <version>${spring.shell.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+            <version>${h2.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>${snakeyaml.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>${checkstyle-plugin.version}</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.puppycrawl.tools</groupId>
+                        <artifactId>checkstyle</artifactId>
+                        <version>${checkstyle.version}</version>
+                    </dependency>
+                </dependencies>
+                <configuration>
+                    <configLocation>${checkstyle.config.url}</configLocation>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
@@ -0,0 +1,13 @@
+package ru.otus.hw;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}
@@ -0,0 +1,25 @@
+package ru.otus.hw.commands;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import ru.otus.hw.converters.AuthorConverter;
+import ru.otus.hw.services.AuthorService;
+
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@ShellComponent
+public class AuthorCommands {
+
+    private final AuthorService authorService;
+
+    private final AuthorConverter authorConverter;
+
+    @ShellMethod(value = "Find all authors", key = "aa")
+    public String findAllAuthors() {
+        return authorService.findAll().stream()
+                .map(authorConverter::authorToString)
+                .collect(Collectors.joining("," + System.lineSeparator()));
+    }
+}
@@ -0,0 +1,49 @@
+package ru.otus.hw.commands;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import ru.otus.hw.converters.BookConverter;
+import ru.otus.hw.services.BookService;
+
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@ShellComponent
+public class BookCommands {
+
+    private final BookService bookService;
+
+    private final BookConverter bookConverter;
+
+    @ShellMethod(value = "Find all books", key = "ab")
+    public String findAllBooks() {
+        return bookService.findAll().stream()
+                .map(bookConverter::bookToString)
+                .collect(Collectors.joining("," + System.lineSeparator()));
+    }
+
+    @ShellMethod(value = "Find book by id", key = "bbid")
+    public String findBookById(long id) {
+        return bookService.findById(id)
+                .map(bookConverter::bookToString)
+                .orElse("Book with id %d not found".formatted(id));
+    }
+
+    @ShellMethod(value = "Insert book", key = "bins")
+    public String insertBook(String title, long authorId, long genreId) {
+        var savedBook = bookService.insert(title, authorId, genreId);
+        return bookConverter.bookToString(savedBook);
+    }
+
+    @ShellMethod(value = "Update book", key = "bupd")
+    public String updateBook(long id, String title, long authorId, long genreId) {
+        var savedBook = bookService.update(id, title, authorId, genreId);
+        return bookConverter.bookToString(savedBook);
+    }
+
+    @ShellMethod(value = "Delete book by id", key = "bdel")
+    public void updateBook(long id) {
+        bookService.deleteById(id);
+    }
+}
@@ -0,0 +1,25 @@
+package ru.otus.hw.commands;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.shell.standard.ShellComponent;
+import org.springframework.shell.standard.ShellMethod;
+import ru.otus.hw.converters.GenreConverter;
+import ru.otus.hw.services.GenreService;
+
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@ShellComponent
+public class GenreCommands {
+
+    private final GenreService genreService;
+
+    private final GenreConverter genreConverter;
+
+    @ShellMethod(value = "Find all genres", key = "ag")
+    public String findAllGenres() {
+        return genreService.findAll().stream()
+                .map(genreConverter::genreToString)
+                .collect(Collectors.joining("," + System.lineSeparator()));
+    }
+}
@@ -0,0 +1,11 @@
+package ru.otus.hw.converters;
+
+import org.springframework.stereotype.Component;
+import ru.otus.hw.models.Author;
+
+@Component
+public class AuthorConverter {
+    public String authorToString(Author author) {
+        return "Id: %d, FullName: %s".formatted(author.getId(), author.getFullName());
+    }
+}
@@ -0,0 +1,21 @@
+package ru.otus.hw.converters;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import ru.otus.hw.models.Book;
+
+@RequiredArgsConstructor
+@Component
+public class BookConverter {
+    private final AuthorConverter authorConverter;
+
+    private final GenreConverter genreConverter;
+
+    public String bookToString(Book book) {
+        return "Id: %d, title: %s, author: {%s}, genres: [%s]".formatted(
+                book.getId(),
+                book.getTitle(),
+                authorConverter.authorToString(book.getAuthor()),
+                genreConverter.genreToString(book.getGenre()));
+    }
+}
@@ -0,0 +1,11 @@
+package ru.otus.hw.converters;
+
+import org.springframework.stereotype.Component;
+import ru.otus.hw.models.Genre;
+
+@Component
+public class GenreConverter {
+    public String genreToString(Genre genre) {
+        return "Id: %d, Name: %s".formatted(genre.getId(), genre.getName());
+    }
+}
@@ -0,0 +1,7 @@
+package ru.otus.hw.exceptions;
+
+public class EntityNotFoundException extends RuntimeException {
+    public EntityNotFoundException(String message) {
+        super(message);
+    }
+}
@@ -0,0 +1,14 @@
+package ru.otus.hw.models;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Author {
+    private long id;
+
+    private String fullName;
+}
@@ -0,0 +1,18 @@
+package ru.otus.hw.models;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Book {
+    private long id;
+
+    private String title;
+
+    private Author author;
+
+    private Genre genre;
+}
@@ -0,0 +1,14 @@
+package ru.otus.hw.models;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class Genre {
+    private long id;
+
+    private String name;
+}
@@ -0,0 +1,12 @@
+package ru.otus.hw.repositories;
+
+import ru.otus.hw.models.Author;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface AuthorRepository {
+    List<Author> findAll();
+
+    Optional<Author> findById(long id);
+}
@@ -0,0 +1,33 @@
+package ru.otus.hw.repositories;
+
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Repository;
+import ru.otus.hw.models.Author;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class AuthorRepositoryJdbc implements AuthorRepository {
+
+    @Override
+    public List<Author> findAll() {
+        return new ArrayList<>();
+    }
+
+    @Override
+    public Optional<Author> findById(long id) {
+        return Optional.empty();
+    }
+
+    private static class AuthorRowMapper implements RowMapper<Author> {
+
+        @Override
+        public Author mapRow(ResultSet rs, int i) throws SQLException {
+            return null;
+        }
+    }
+}
@@ -0,0 +1,16 @@
+package ru.otus.hw.repositories;
+
+import ru.otus.hw.models.Book;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface BookRepository {
+    Optional<Book> findById(long id);
+
+    List<Book> findAll();
+
+    Book save(Book book);
+
+    void deleteById(long id);
+}
@@ -0,0 +1,62 @@
+package ru.otus.hw.repositories;
+
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.jdbc.support.GeneratedKeyHolder;
+import org.springframework.stereotype.Repository;
+import ru.otus.hw.models.Book;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class BookRepositoryJdbc implements BookRepository {
+
+    @Override
+    public Optional<Book> findById(long id) {
+        return Optional.empty();
+    }
+
+    @Override
+    public List<Book> findAll() {
+        return new ArrayList<>();
+    }
+
+    @Override
+    public Book save(Book book) {
+        if (book.getId() == 0) {
+            return insert(book);
+        }
+        return update(book);
+    }
+
+    @Override
+    public void deleteById(long id) {
+        //...
+    }
+
+    private Book insert(Book book) {
+        var keyHolder = new GeneratedKeyHolder();
+
+        //...
+
+        //noinspection DataFlowIssue
+        book.setId(keyHolder.getKeyAs(Long.class));
+        return book;
+    }
+
+    private Book update(Book book) {
+        //...
+        return book;
+    }
+
+    private static class BookRowMapper implements RowMapper<Book> {
+
+        @Override
+        public Book mapRow(ResultSet rs, int rowNum) throws SQLException {
+            return null;
+        }
+    }
+}
@@ -0,0 +1,12 @@
+package ru.otus.hw.repositories;
+
+import ru.otus.hw.models.Genre;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface GenreRepository {
+    List<Genre> findAll();
+
+    Optional<Genre> findById(long id);
+}
@@ -0,0 +1,33 @@
+package ru.otus.hw.repositories;
+
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.stereotype.Repository;
+import ru.otus.hw.models.Genre;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class GenreRepositoryJdbc implements GenreRepository {
+
+    @Override
+    public List<Genre> findAll() {
+        return new ArrayList<>();
+    }
+
+    @Override
+    public Optional<Genre> findById(long id) {
+        return Optional.empty();
+    }
+
+    private static class GnreRowMapper implements RowMapper<Genre> {
+
+        @Override
+        public Genre mapRow(ResultSet rs, int i) throws SQLException {
+            return null;
+        }
+    }
+}
@@ -0,0 +1,9 @@
+package ru.otus.hw.services;
+
+import ru.otus.hw.models.Author;
+
+import java.util.List;
+
+public interface AuthorService {
+    List<Author> findAll();
+}
@@ -0,0 +1,19 @@
+package ru.otus.hw.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.otus.hw.models.Author;
+import ru.otus.hw.repositories.AuthorRepository;
+
+import java.util.List;
+
+@RequiredArgsConstructor
+@Service
+public class AuthorServiceImpl implements AuthorService {
+    private final AuthorRepository authorRepository;
+
+    @Override
+    public List<Author> findAll() {
+        return authorRepository.findAll();
+    }
+}
@@ -0,0 +1,18 @@
+package ru.otus.hw.services;
+
+import ru.otus.hw.models.Book;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface BookService {
+    Optional<Book> findById(long id);
+
+    List<Book> findAll();
+
+    Book insert(String title, long authorId, long genreId);
+
+    Book update(long id, String title, long authorId, long genreId);
+
+    void deleteById(long id);
+}
@@ -0,0 +1,56 @@
+package ru.otus.hw.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.otus.hw.exceptions.EntityNotFoundException;
+import ru.otus.hw.models.Book;
+import ru.otus.hw.repositories.AuthorRepository;
+import ru.otus.hw.repositories.BookRepository;
+import ru.otus.hw.repositories.GenreRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+@RequiredArgsConstructor
+@Service
+public class BookServiceImpl implements BookService {
+    private final AuthorRepository authorRepository;
+
+    private final GenreRepository genreRepository;
+
+    private final BookRepository bookRepository;
+
+    @Override
+    public Optional<Book> findById(long id) {
+        return bookRepository.findById(id);
+    }
+
+    @Override
+    public List<Book> findAll() {
+        return bookRepository.findAll();
+    }
+
+    @Override
+    public Book insert(String title, long authorId, long genreId) {
+        return save(0, title, authorId, genreId);
+    }
+
+    @Override
+    public Book update(long id, String title, long authorId, long genreId) {
+        return save(id, title, authorId, genreId);
+    }
+
+    @Override
+    public void deleteById(long id) {
+        bookRepository.deleteById(id);
+    }
+
+    private Book save(long id, String title, long authorId, long genreId) {
+        var author = authorRepository.findById(authorId)
+                .orElseThrow(() -> new EntityNotFoundException("Author with id %d not found".formatted(authorId)));
+        var genre = genreRepository.findById(genreId)
+                .orElseThrow(() -> new EntityNotFoundException("Genre with id %d not found".formatted(genreId)));
+        var book = new Book(id, title, author, genre);
+        return bookRepository.save(book);
+    }
+}
@@ -0,0 +1,9 @@
+package ru.otus.hw.services;
+
+import ru.otus.hw.models.Genre;
+
+import java.util.List;
+
+public interface GenreService {
+    List<Genre> findAll();
+}
@@ -0,0 +1,19 @@
+package ru.otus.hw.services;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ru.otus.hw.models.Genre;
+import ru.otus.hw.repositories.GenreRepository;
+
+import java.util.List;
+
+@RequiredArgsConstructor
+@Service
+public class GenreServiceImpl implements GenreService {
+    private final GenreRepository genreRepository;
+
+    @Override
+    public List<Genre> findAll() {
+        return genreRepository.findAll();
+    }
+}
@@ -0,0 +1,8 @@
+spring:
+  datasource:
+    url: jdbc:h2:mem:maindb
+  sql:
+    init:
+      mode: always
+      data-locations: data.sql
+      schema-locations: schema.sql
@@ -0,0 +1,8 @@
+insert into authors(full_name)
+values ('Author_1'), ('Author_2'), ('Author_3');
+
+insert into genres(name)
+values ('Genre_1'), ('Genre_2'), ('Genre_3');
+
+insert into books(title, author_id, genre_id)
+values ('BookTitle_1', 1, 1), ('BookTitle_2', 2, 2), ('BookTitle_3', 3, 3);
@@ -0,0 +1,19 @@
+create table authors (
+    id bigserial,
+    full_name varchar(255),
+    primary key (id)
+);
+
+create table genres (
+    id bigserial,
+    name varchar(255),
+    primary key (id)
+);
+
+create table books (
+    id bigserial,
+    title varchar(255),
+    author_id bigint references authors (id) on delete cascade,
+    genre_id bigint references genres(id) on delete cascade,
+    primary key (id)
+);
@@ -0,0 +1,128 @@
+package ru.otus.hw.repositories;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.jdbc.JdbcTest;
+import org.springframework.context.annotation.Import;
+import ru.otus.hw.models.Author;
+import ru.otus.hw.models.Book;
+import ru.otus.hw.models.Genre;
+
+import java.util.List;
+import java.util.stream.IntStream;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@DisplayName("Репозиторий на основе Jdbc для работы с книгами ")
+@JdbcTest
+@Import({BookRepositoryJdbc.class, GenreRepositoryJdbc.class})
+class BookRepositoryJdbcTest {
+
+    @Autowired
+    private BookRepositoryJdbc repositoryJdbc;
+
+    private List<Author> dbAuthors;
+
+    private List<Genre> dbGenres;
+
+    private List<Book> dbBooks;
+
+    @BeforeEach
+    void setUp() {
+        dbAuthors = getDbAuthors();
+        dbGenres = getDbGenres();
+        dbBooks = getDbBooks(dbAuthors, dbGenres);
+    }
+
+    @DisplayName("должен загружать книгу по id")
+    @ParameterizedTest
+    @MethodSource("getDbBooks")
+    void shouldReturnCorrectBookById(Book expectedBook) {
+        var actualBook = repositoryJdbc.findById(expectedBook.getId());
+        assertThat(actualBook).isPresent()
+                .get()
+                .isEqualTo(expectedBook);
+    }
+
+    @DisplayName("должен загружать список всех книг")
+    @Test
+    void shouldReturnCorrectBooksList() {
+        var actualBooks = repositoryJdbc.findAll();
+        var expectedBooks = dbBooks;
+
+        assertThat(actualBooks).containsExactlyElementsOf(expectedBooks);
+        actualBooks.forEach(System.out::println);
+    }
+
+    @DisplayName("должен сохранять новую книгу")
+    @Test
+    void shouldSaveNewBook() {
+        var expectedBook = new Book(0, "BookTitle_10500", dbAuthors.get(0), dbGenres.get(0));
+        var returnedBook = repositoryJdbc.save(expectedBook);
+        assertThat(returnedBook).isNotNull()
+                .matches(book -> book.getId() > 0)
+                .usingRecursiveComparison().ignoringExpectedNullFields().isEqualTo(expectedBook);
+
+        assertThat(repositoryJdbc.findById(returnedBook.getId()))
+                .isPresent()
+                .get()
+                .isEqualTo(returnedBook);
+    }
+
+    @DisplayName("должен сохранять измененную книгу")
+    @Test
+    void shouldSaveUpdatedBook() {
+        var expectedBook = new Book(1L, "BookTitle_10500", dbAuthors.get(2), dbGenres.get(2));
+
+        assertThat(repositoryJdbc.findById(expectedBook.getId()))
+                .isPresent()
+                .get()
+                .isNotEqualTo(expectedBook);
+
+        var returnedBook = repositoryJdbc.save(expectedBook);
+        assertThat(returnedBook).isNotNull()
+                .matches(book -> book.getId() > 0)
+                .usingRecursiveComparison().ignoringExpectedNullFields().isEqualTo(expectedBook);
+
+        assertThat(repositoryJdbc.findById(returnedBook.getId()))
+                .isPresent()
+                .get()
+                .isEqualTo(returnedBook);
+    }
+
+    @DisplayName("должен удалять книгу по id ")
+    @Test
+    void shouldDeleteBook() {
+        assertThat(repositoryJdbc.findById(1L)).isPresent();
+        repositoryJdbc.deleteById(1L);
+        assertThat(repositoryJdbc.findById(1L)).isEmpty();
+    }
+
+    private static List<Author> getDbAuthors() {
+        return IntStream.range(1, 4).boxed()
+                .map(id -> new Author(id, "Author_" + id))
+                .toList();
+    }
+
+    private static List<Genre> getDbGenres() {
+        return IntStream.range(1, 4).boxed()
+                .map(id -> new Genre(id, "Genre_" + id))
+                .toList();
+    }
+
+    private static List<Book> getDbBooks(List<Author> dbAuthors, List<Genre> dbGenres) {
+        return IntStream.range(1, 4).boxed()
+                .map(id -> new Book(id, "BookTitle_" + id, dbAuthors.get(id - 1), dbGenres.get(id - 1)))
+                .toList();
+    }
+
+    private static List<Book> getDbBooks() {
+        var dbAuthors = getDbAuthors();
+        var dbGenres = getDbGenres();
+        return getDbBooks(dbAuthors, dbGenres);
+    }
+}
@@ -0,0 +1,8 @@
+spring:
+  datasource:
+    url: jdbc:h2:mem:testdb
+  sql:
+    init:
+      mode: always
+      data-locations: data.sql
+      schema-locations: schema.sql
@@ -0,0 +1,8 @@
+insert into authors(full_name)
+values ('Author_1'), ('Author_2'), ('Author_3');
+
+insert into genres(name)
+values ('Genre_1'), ('Genre_2'), ('Genre_3');
+
+insert into books(title, author_id, genre_id)
+values ('BookTitle_1', 1, 1), ('BookTitle_2', 2, 2), ('BookTitle_3', 3, 3);