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package org.glassfish.jersey.ext.cdi1x.internal;

import javax.annotation.Priority;
import javax.enterprise.inject.spi.BeanManager;

import org.glassfish.jersey.ext.cdi1x.internal.spi.BeanManagerProvider;
import org.glassfish.jersey.ext.cdi1x.internal.spi.Hk2LocatorManager;

import org.glassfish.hk2.api.ServiceLocator;

import org.junit.Test;

import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.junit.Assert.assertThat;

import mockit.Mock;
import mockit.MockUp;
import mockit.Mocked;
import mockit.Verifications;

/**
 * Unit tests for {@link org.glassfish.jersey.ext.cdi1x.internal.CdiUtil}.
 *
 * @author Michal Gajdos (michal.gajdos at oracle.com)
 */
public class CdiUtilTest {

    public static class TestBeanManagerProvider implements BeanManagerProvider {

        @Override
        public BeanManager getBeanManager() {
            throw new RuntimeException("BeanManager!");
        }
    }

    @Test
    public void getBeanManagerCustom(@Mocked final TestBeanManagerProvider custom,
                                     @Mocked final DefaultBeanManagerProvider fallback) throws Exception {
        CdiUtil.getBeanManager();

        new Verifications() {{
            custom.getBeanManager(); times = 1;
            fallback.getBeanManager(); times = 0;
        }};
    }

    @Test
    public void getDefaultBeanManagerDefault(@Mocked final DefaultBeanManagerProvider fallback) throws Exception {
        new MockUp<CdiUtil>() {
            @Mock
            @SuppressWarnings("UnusedDeclaration")
            <T> T lookupService(final Class<T> clazz) {
                return null;
            }
        };

        CdiUtil.getBeanManager();

        new Verifications() {{
            fallback.getBeanManager(); times = 1;
        }};
    }

    @Priority(500)
    public static class MyServiceOne implements MyService {
    }

    @Priority(100)
    public static class MyServiceTwo implements MyService {
    }

    @Priority(300)
    public static class MyServiceThree implements MyService {
    }

    @Test
    public void testLookupService() throws Exception {
        assertThat(CdiUtil.lookupService(MyService.class), instanceOf(MyServiceTwo.class));
    }

    @Test
    public void testLookupServiceNegative() throws Exception {
        assertThat(CdiUtil.lookupService(CdiUtil.class), nullValue());
    }

    public static class TestHk2LocatorManager implements Hk2LocatorManager {

        @Override
        public void registerLocator(final ServiceLocator locator) {
        }

        @Override
        public ServiceLocator getEffectiveLocator() {
            return null;
        }
    }

    @Test
    public void createHk2LocatorManagerCustom() throws Exception {
        assertThat(CdiUtil.createHk2LocatorManager(), instanceOf(TestHk2LocatorManager.class));
    }

    @Test
    public void createHk2LocatorManagerDefault() throws Exception {
        new MockUp<CdiUtil>() {
            @Mock
            @SuppressWarnings("UnusedDeclaration")
            <T> T lookupService(final Class<T> clazz) {
                return null;
            }
        };

        assertThat(CdiUtil.createHk2LocatorManager(), instanceOf(DefaultHk2LocatorManager.class));
    }
}
