SupplierContractsTest.java

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package org.glassfish.jersey.inject.hk2;

import javax.inject.Singleton;

import org.glassfish.jersey.internal.inject.InjectionManager;

import org.glassfish.hk2.api.MultiException;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertSame;

/**
 * Tests that {@link java.util.function.Supplier} can contain multiple contracts.
 *
 * @author Petr Bouda (petr.bouda at oracle.com)
 */
public class SupplierContractsTest {

    private InjectionManager injectionManager;

    @Before
    public void setup() {
        injectionManager = BindingTestHelper.createInjectionManager();
    }

    @After
    public void teardown() {
        injectionManager.shutdown();
    }


    @Test
    public void testClassFactoryInstanceInterface() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(SupplierGreeting.class).to(Greeting.class);
            binder.bindAsContract(Conversation.class);
        });

        Conversation conversation = injectionManager.getInstance(Conversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.greetingSupplier.get());
    }

    @Test
    public void testClassFactoryInstanceImplementation() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(SupplierGreeting.class).to(CzechGreeting.class);
            binder.bindAsContract(CzechConversation.class);
        });

        CzechConversation conversation = injectionManager.getInstance(CzechConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.greetingSupplier.get());
    }

    @Test
    public void testInstanceFactoryInstanceInterface() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(new SupplierGreeting()).to(Greeting.class);
            binder.bindAsContract(Conversation.class);
        });

        Conversation conversation = injectionManager.getInstance(Conversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.greetingSupplier.get());
    }

    @Test
    public void testInstanceFactoryInstanceImplementation() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(new SupplierGreeting()).to(CzechGreeting.class);
            binder.bindAsContract(CzechConversation.class);
        });

        CzechConversation conversation = injectionManager.getInstance(CzechConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.greetingSupplier.get());
    }

    @Test
    public void testClassFactoryMultipleContracts() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(SupplierGreeting.class)
                    .to(Greeting.class)
                    .to(Printable.class);
            binder.bindAsContract(PrintableConversation.class);
        });

        PrintableConversation conversation = injectionManager.getInstance(PrintableConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.printable);
        assertNotNull(conversation.greetingSupplier);
        assertNotNull(conversation.printableSupplier);

        assertNotSame(conversation.greeting, conversation.printable);
        assertNotSame(conversation.greetingSupplier, conversation.printableSupplier);
    }

    @Test
    public void testClassFactorySingletonMultipleContracts() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(SupplierGreeting.class, Singleton.class)
                    .to(Greeting.class)
                    .to(Printable.class);
            binder.bindAsContract(PrintableConversation.class);
        });

        PrintableConversation conversation = injectionManager.getInstance(PrintableConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.printable);
        assertNotNull(conversation.greetingSupplier);
        assertNotNull(conversation.printableSupplier);

        assertNotSame(conversation.greeting, conversation.printable);
        assertSame(conversation.greetingSupplier, conversation.printableSupplier);
    }

    @Test
    public void testClassFactoryMultipleContractsSingleton() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(SupplierGreeting.class)
                    .to(Greeting.class)
                    .to(Printable.class)
                    .in(Singleton.class);
            binder.bindAsContract(PrintableConversation.class);
        });

        PrintableConversation conversation = injectionManager.getInstance(PrintableConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.printable);
        assertNotNull(conversation.greetingSupplier);
        assertNotNull(conversation.printableSupplier);

        assertSame(conversation.greeting, conversation.printable);
        assertNotSame(conversation.greetingSupplier, conversation.printableSupplier);
    }

    @Test
    public void testInstanceFactoryMultipleContracts() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(new SupplierGreeting())
                    .to(Greeting.class)
                    .to(Printable.class);
            binder.bindAsContract(PrintableConversation.class);
        });

        PrintableConversation conversation = injectionManager.getInstance(PrintableConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.printable);
        assertNotNull(conversation.greetingSupplier);
        assertNotNull(conversation.printableSupplier);

        assertNotSame(conversation.greeting, conversation.printable);
        assertSame(conversation.greetingSupplier, conversation.printableSupplier);
    }

    @Test
    public void testInstanceFactoryMultipleContractsSingleton() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(new SupplierGreeting())
                    .to(Greeting.class)
                    .to(Printable.class)
                    .in(Singleton.class);
            binder.bindAsContract(PrintableConversation.class);
        });

        PrintableConversation conversation = injectionManager.getInstance(PrintableConversation.class);
        assertNotNull(conversation.greeting);
        assertNotNull(conversation.printable);
        assertNotNull(conversation.greetingSupplier);
        assertNotNull(conversation.printableSupplier);

        assertSame(conversation.greeting, conversation.printable);
        assertSame(conversation.greetingSupplier, conversation.printableSupplier);
    }

    @Test(expected = MultiException.class)
    public void testClassFactoryFailedWrongImplementation() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(SupplierGreeting.class).to(EnglishGreeting.class);
            binder.bindAsContract(Conversation.class);
        });

        injectionManager.getInstance(Conversation.class);
    }

    @Test(expected = MultiException.class)
    public void testInstanceFactoryFailsWrongImplementation() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(new SupplierGreeting()).to(EnglishGreeting.class);
            binder.bindAsContract(Conversation.class);
        });

        injectionManager.getInstance(Conversation.class);
    }

    @Test(expected = MultiException.class)
    public void testFailsImplementationButInterfaceExpected() {
        BindingTestHelper.bind(injectionManager, binder -> {
            binder.bindFactory(new SupplierGreeting()).to(CzechGreeting.class);
            binder.bindAsContract(Conversation.class);
        });

        injectionManager.getInstance(Conversation.class);
    }
}