Product Repository Tests

Write tests for a Spring Boot JPA repository for a product catalog. The application has:

• Product entity with fields: id (Long), name (String), category (String), price (BigDecimal), inStock (boolean)
• ProductRepository extends JpaRepository<Product, Long> with custom query methods:
  • List<Product> findByCategory(String category)
  • List<Product> findByPriceLessThan(BigDecimal maxPrice)
  • List<Product> findByInStockTrue()

Output

Produce a Java test file at src/test/java/com/example/catalog/repository/ProductRepositoryTest.java.

Test at minimum:

1. findByCategory returns matching products
2. findByCategory returns empty list when no match
3. findByPriceLessThan returns products under the price threshold
4. findByInStockTrue returns only in-stock products
5. Saving and retrieving a product works correctly

Do not produce the application source code -- only the test file.