Title derived query 10

pom.xml

@@ -1,6 +1,6 @@
 <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
@@ -39,11 +39,11 @@
 			<artifactId>graphql-spring-boot-starter</artifactId>
 			<version>${graphql.version}</version>
 		</dependency>
-        <dependency>
-            <groupId>com.graphql-java-kickstart</groupId>
-            <artifactId>playground-spring-boot-starter</artifactId>
-            <version>${graphql.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>com.graphql-java-kickstart</groupId>
+			<artifactId>playground-spring-boot-starter</artifactId>
+			<version>${graphql.version}</version>
+		</dependency>
 		<dependency>
 			<groupId>com.graphql-java-kickstart</groupId>
 			<artifactId>voyager-spring-boot-starter</artifactId>
@@ -101,6 +101,14 @@
 					</execution>
 				</executions>
 			</plugin>
+			<plugin>
+				<artifactId>maven-compiler-plugin</artifactId>
+
+				<configuration>
+					<source>11</source>
+					<target>11</target>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 

src/main/java/com/karankumar/booksapi/repository/BookRepository.java

@@ -26,4 +26,6 @@ public interface BookRepository extends CrudRepository<Book, Long> {
     List<Book> findAllBooks();
 
     Book findBookByIsbn13(String isbn13);
+
+    Book findByTitleIgnoreCase(String title);
 }

src/main/java/com/karankumar/booksapi/resolver/QueryResolver.java

@@ -43,4 +43,8 @@ public Iterable<Author> findAllAuthors() {
     public Book findBookByIsbn13(String isbn13) {
         return bookRepository.findBookByIsbn13(isbn13);
     }
+
+     public Book findByTitleIgnoreCase(String title) {
+        return bookRepository.findByTitleIgnoreCase(title);
+    }
 }

src/main/resources/graphql/query.graphqls

@@ -1,4 +1,5 @@
 type Query {
     findAllBooks: [Book]!
     findBookByIsbn13(isbn13: String!): Book!
+    findByTitleIgnoreCase(title: String!): Book
 }

src/test/java/com/karankumar/booksapi/repository/BookRepositoryTest.java

@@ -38,6 +38,7 @@
 @DisplayName("BookRepository should")
 class BookRepositoryTest {
     private static final String ISBN = "978-3-16-148410-0";
+    private static final String TITLE = "Harry Potter";
 
     private final BookRepository bookRepository;
     private final AuthorRepository authorRepository;
@@ -106,6 +107,45 @@ private Book createBookwithISBN() {
         return book;
     }
 
+    @Test
+      void findBookByTitle() {
+        // given
+        createAndSaveAuthors();
+        Book book = new Book(
+                TITLE,
+                new Author[]{author1, author2},
+                Language.ENGLISH,
+                ""
+        );
+        bookRepository.save(book);
+
+        // when
+        Book result = bookRepository.findByTitleIgnoreCase(TITLE);
+
+        // then
+        assertThat(result).isEqualTo(book);
+    }
+
+    @Test
+    @DisplayName("find book by title case insensitive")
+    void findBookByTitleCaseInsensitive() {
+        // given
+        createAndSaveAuthors();
+        Book book = new Book(
+                TITLE,
+                new Author[]{author1, author2},
+                Language.ENGLISH,
+                ""
+        );
+        bookRepository.save(book);
+
+        // when
+        Book result = bookRepository.findByTitleIgnoreCase(TITLE.toLowerCase());
+
+        // then
+        assertThat(result).isEqualTo(book);
+    }
+
     private void saveAllAuthors(Author... authors) {
         Arrays.stream(authors).forEach(authorRepository::save);
     }