Favor Java over Kotlin

data/data-jdbc-h2-kotlin/src/test/java/com/example/data/jdbc/h2/kotlin/DataJdbcTests.java

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+package com.example.data.jdbc.h2.kotlin;
+
+import com.example.data.jdbc.h2.kotlin.model.Author;
+import com.example.data.jdbc.h2.kotlin.model.Book;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.data.jdbc.DataJdbcTest;
+import org.springframework.jdbc.core.JdbcTemplate;
+import java.util.Set;
+
+@DataJdbcTest
+class DataJdbcTests {
+
+	@Autowired
+	private JdbcTemplate jdbcTemplate;
+
+	@Autowired
+	private AuthorRepository authorRepository;
+
+	@Test
+	void shouldHaveSchema() {
+		Assertions.assertThatNoException().isThrownBy(() -> jdbcTemplate.execute("SELECT * FROM author"));
+	}
+
+	@Test
+	void shouldSaveAndLoad() {
+
+		var book1 = new Book(null, "book-1");
+		var author1 = new Author(null, "author-1", Set.of(book1));
+		authorRepository.save(author1);
+		var found = authorRepository.queryFindByName("author-1");
+		Assertions.assertThat(found).isNotNull();
+		Assertions.assertThat(found.getId()).isNotNull();
+		Assertions.assertThat(found.getName()).isEqualTo("author-1");
+		Assertions.assertThat(found.getBooks()).hasSize(1);
+	}
+
+}