java_upgrade/src/test/java/optional/ProductDAOTest.java at master · MSMyanmar/java_upgrade · GitHub

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package optional;

import org.junit.Test;

import java.util.Optional;

import java.util.stream.IntStream;

import static org.junit.Assert.*;

public class ProductDAOTest {

private ProductDAO dao = new ProductDAO();

@Test

public void findById_exists() {

IntStream.rangeClosed(1, 3)

.forEach(id -> assertTrue(dao.findById(id).isPresent()));

}

@Test

public void findById_doesNotExist() {

Optional<Product> optionalProduct = dao.findById(999);

assertFalse(optionalProduct.isPresent());

}

@Test

public void getProductById_exists() {

Product product = dao.getProductById(1);

assertEquals(1, product.getId().intValue());

}

@Test

public void getProductById_doesNotExist() {

Product product = dao.getProductById(999);

assertEquals(999, product.getId().intValue());

}

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