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 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *    http://www.apache.org/licenses/LICENSE-2.0
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 *  KIND, either express or implied.  See the License for the
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package org.apache.cayenne.di.spi;

import org.apache.cayenne.di.Binder;
import org.apache.cayenne.di.DIRuntimeException;
import org.apache.cayenne.di.Module;
import org.apache.cayenne.di.mock.MockImplementation1_DepOn2;
import org.apache.cayenne.di.mock.MockImplementation1_DepOn2Constructor;
import org.apache.cayenne.di.mock.MockImplementation1_DepOn2Provider;
import org.apache.cayenne.di.mock.MockImplementation2;
import org.apache.cayenne.di.mock.MockImplementation2_Constructor;
import org.apache.cayenne.di.mock.MockImplementation2_I3Dependency;
import org.apache.cayenne.di.mock.MockImplementation3;
import org.apache.cayenne.di.mock.MockInterface1;
import org.apache.cayenne.di.mock.MockInterface2;
import org.apache.cayenne.di.mock.MockInterface3;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

public class DefaultInjectorCircularInjectionTest {

    @Test
    public void testFieldInjection_CircularDependency() {

        Module module = new Module() {

            public void configure(Binder binder) {
                binder.bind(MockInterface1.class).to(MockImplementation1_DepOn2.class);
                binder.bind(MockInterface2.class).to(MockImplementation2.class);
            }
        };

        DefaultInjector injector = new DefaultInjector(module);

        try {
            injector.getInstance(MockInterface1.class);
            fail("Circular dependency is not detected.");
        }
        catch (DIRuntimeException e) {
            // expected
        }
        catch (StackOverflowError e) {
            fail("Circular dependency is not detected, causing stack overflow");
        }
    }

    @Test
    public void testProviderInjection_CircularDependency() {

        Module module = new Module() {

            public void configure(Binder binder) {
                binder.bind(MockInterface1.class).to(
                        MockImplementation1_DepOn2Provider.class);
                binder.bind(MockInterface2.class).to(MockImplementation2.class);
            }
        };

        DefaultInjector injector = new DefaultInjector(module);

        MockInterface1 service = injector.getInstance(MockInterface1.class);
        assertEquals("MockImplementation2Name", service.getName());
    }

    @Test
    public void testConstructorInjection_CircularDependency() {

        Module module = new Module() {

            public void configure(Binder binder) {
                binder.bind(MockInterface1.class).to(
                        MockImplementation1_DepOn2Constructor.class);
                binder.bind(MockInterface2.class).to(
                        MockImplementation2_Constructor.class);
            }
        };

        DefaultInjector injector = new DefaultInjector(module);

        try {
            injector.getInstance(MockInterface1.class);
            fail("Circular dependency is not detected.");
        }
        catch (DIRuntimeException e) {
            // expected
        }
        catch (StackOverflowError e) {
            fail("Circular dependency is not detected, causing stack overflow");
        }
    }

    @Test
    public void testConstructorInjection_WithFieldInjectionDeps() {

        Module module = new Module() {

            public void configure(Binder binder) {
                binder.bind(MockInterface1.class).to(
                        MockImplementation1_DepOn2Constructor.class);
                binder.bind(MockInterface2.class).to(
                        MockImplementation2_I3Dependency.class);
                binder.bind(MockInterface3.class).to(MockImplementation3.class);
            }
        };

        DefaultInjector injector = new DefaultInjector(module);

        try {
            injector.getInstance(MockInterface1.class);
        }
        catch (DIRuntimeException e) {
            fail("Circular dependency is detected incorrectly: " + e.getMessage());
        }
    }
}