Java Community | Help. Code. Learn.•10mo ago

JUnit, can I create an EntityManager or even a session without running the server?

import org.junit.Test;
import org.junit.jupiter.api.BeforeAll;
public class OrderTest {
    @PersistenceContext(unitName = "WebPU")
    private EntityManager em;

    @BeforeAll
    public static void setUpClass() {

    }
    @Test
    public boolean testOrderCreation() {
        List<Destination> destinationList = em.createQuery("SELECT dt FROM Destination dt WHERE dt.id=:id", Destination.class)
                .setParameter("id", 1).getResultList();
        Destination destination = destinationList.get(0);
        if (destinationList.size() != 1) {
           return false;
        }
        List<Product> productList = em.createQuery("SELECT pdt FROM Product pdt WHERE pdt.id=:id", Product.class)
                .setParameter("id", 1).getResultList();

        if (productList.size() != 1) {
             return false;
        }
        Product product = productList.get(0);

        Orders order = new Orders();
        order.setProductId(product);
        order.setDestination(destination);
        order.setQty(10);
        order.setCreatedAt(LocalDateTime.now());
        order.setExpectedDate(LocalDateTime.now().plusDays(5));
        order.setOrderStatus("not_shipped");
        em.persist(order);
        return true;
    }
}

import org.junit.Test;
import org.junit.jupiter.api.BeforeAll;
public class OrderTest {
    @PersistenceContext(unitName = "WebPU")
    private EntityManager em;

    @BeforeAll
    public static void setUpClass() {

    }
    @Test
    public boolean testOrderCreation() {
        List<Destination> destinationList = em.createQuery("SELECT dt FROM Destination dt WHERE dt.id=:id", Destination.class)
                .setParameter("id", 1).getResultList();
        Destination destination = destinationList.get(0);
        if (destinationList.size() != 1) {
           return false;
        }
        List<Product> productList = em.createQuery("SELECT pdt FROM Product pdt WHERE pdt.id=:id", Product.class)
                .setParameter("id", 1).getResultList();

        if (productList.size() != 1) {
             return false;
        }
        Product product = productList.get(0);

        Orders order = new Orders();
        order.setProductId(product);
        order.setDestination(destination);
        order.setQty(10);
        order.setCreatedAt(LocalDateTime.now());
        order.setExpectedDate(LocalDateTime.now().plusDays(5));
        order.setOrderStatus("not_shipped");
        em.persist(order);
        return true;
    }
}

33 Replies

JavaBot•10mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

public class OrderTestRunner {
    public static void main(String[] args) {
        Result result = JUnitCore.runClasses(OrderTest.class);
        for (Failure failure : result.getFailures()) {
            System.out.println(failure.toString());
        }

        System.out.println(result.wasSuccessful());
    }
}

import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

public class OrderTestRunner {
    public static void main(String[] args) {
        Result result = JUnitCore.runClasses(OrderTest.class);
        for (Failure failure : result.getFailures()) {
            System.out.println(failure.toString());
        }

        System.out.println(result.wasSuccessful());
    }
}

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

Location

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

Problem

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

alright

szatkus•10mo ago

Yes

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

ok so but now my test is failure

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

how can I know why this is it?

szatkus•10mo ago

Because you return boolean for some reason.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

I just changed it to void

szatkus•10mo ago

Oh, I see.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

same class with void

public class OrderTest {
    @PersistenceContext(unitName = "WebPU")
    private EntityManager em;

    @BeforeAll
    public static void setUpClass() {

    }
    @Test
    public void testOrderCreation() {
        List<Destination> destinationList = em.createQuery("SELECT dt FROM Destination dt WHERE dt.id=:id", Destination.class)
                .setParameter("id", 1).getResultList();
        Destination destination = destinationList.get(0);
        if (destinationList.size() != 1) {
            System.out.println("couldn't find destination");
           return ;
        }
        List<Product> productList = em.createQuery("SELECT pdt FROM Product pdt WHERE pdt.id=:id", Product.class)
                .setParameter("id", 1).getResultList();

        if (productList.size() != 1) {
            System.out.println("couldn't find product");
             return ;
        }
        Product product = productList.get(0);

        Orders order = new Orders();
        order.setProductId(product);
        order.setDestination(destination);
        order.setQty(10);
        order.setCreatedAt(LocalDateTime.now());
        order.setExpectedDate(LocalDateTime.now().plusDays(5));
        order.setOrderStatus("not_shipped");
        em.persist(order);
        System.out.println("Insertion Success");
    }
}

public class OrderTest {
    @PersistenceContext(unitName = "WebPU")
    private EntityManager em;

    @BeforeAll
    public static void setUpClass() {

    }
    @Test
    public void testOrderCreation() {
        List<Destination> destinationList = em.createQuery("SELECT dt FROM Destination dt WHERE dt.id=:id", Destination.class)
                .setParameter("id", 1).getResultList();
        Destination destination = destinationList.get(0);
        if (destinationList.size() != 1) {
            System.out.println("couldn't find destination");
           return ;
        }
        List<Product> productList = em.createQuery("SELECT pdt FROM Product pdt WHERE pdt.id=:id", Product.class)
                .setParameter("id", 1).getResultList();

        if (productList.size() != 1) {
            System.out.println("couldn't find product");
             return ;
        }
        Product product = productList.get(0);

        Orders order = new Orders();
        order.setProductId(product);
        order.setDestination(destination);
        order.setQty(10);
        order.setCreatedAt(LocalDateTime.now());
        order.setExpectedDate(LocalDateTime.now().plusDays(5));
        order.setOrderStatus("not_shipped");
        em.persist(order);
        System.out.println("Insertion Success");
    }
}

szatkus•10mo ago

You're meddling with pure JUnit. That's unusual. Let me look this up. failure.getException().printStackTrace();

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

ok null pointer exception is the cause

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

but there is clearly a Destination with id 1

szatkus•10mo ago

Probably there's nothing there to interpret the PersistenceContext annotation.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

here

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

so it is not even there in the first place EntityManager is null

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

Arquillian needed?

szatkus•10mo ago

No idea, I wouldn't use a single thing that you're using except Java.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

why? The requirement is to use JUnit for the assignment

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

see

szatkus•10mo ago

Java EE is getting less and less popular and nowdays it's usually a red flag indicating a shitty project.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

yah we had a convo today in general

szatkus•10mo ago

I'd use JUnit, but you're apparently using JUnit 4, which I wouldn't pick, because JUnit 5 is more enjoyable to work with.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

https://discord.com/channels/648956210850299986/653632542100160547/1241660779640520745

Suika•10mo ago

idk really, the tech is too old

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

yah but 5 has like a lot more configurations so I chose 4 because just one or two dependencies

szatkus•10mo ago

If you asked that a month ago I could've look up, because I had access to a Java EE project with JUnit tests.

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

also I just started to work with JUnit 3 horus hours ago. read an article started to implement into the project where else can I apply JUnit beside the EJB because this thing requires a lot of configuration at last to get some marks

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JUnit, can I create an EntityManager or even a session without running the server?

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