TypeProducerFactoryTest.java

/*******************************************************************************
 * Copyright (c) 2012-2016 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.everrest.core.impl.method;

import org.everrest.core.method.TypeProducer;
import org.everrest.core.util.ParameterizedTypeImpl;
import org.junit.Before;
import org.junit.Test;

import java.util.List;
import java.util.Set;
import java.util.SortedSet;

import static org.junit.Assert.assertEquals;

public class TypeProducerFactoryTest {
    private TypeProducerFactory typeProducerFactory;

    @Before
    public void setUp() throws Exception {
        typeProducerFactory = new TypeProducerFactory();
    }

    @Test
    public void createsProducerForListOfString() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory.createTypeProducer(List.class, ParameterizedTypeImpl.newParameterizedType(List.class, String.class));
        assertEquals(CollectionStringProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForSetOfString() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory.createTypeProducer(Set.class, ParameterizedTypeImpl.newParameterizedType(Set.class, String.class));
        assertEquals(CollectionStringProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForSortedSetOfString() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory
                        .createTypeProducer(SortedSet.class, ParameterizedTypeImpl.newParameterizedType(SortedSet.class, String.class));
        assertEquals(CollectionStringProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForListOfTypeThatHasStringConstructor() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory.createTypeProducer(List.class,
                                                   ParameterizedTypeImpl.newParameterizedType(List.class, StringConstructorClass.class));
        assertEquals(CollectionStringConstructorProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForSetOfTypeThatHasStringConstructor() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory
                        .createTypeProducer(Set.class, ParameterizedTypeImpl.newParameterizedType(Set.class, StringConstructorClass.class));
        assertEquals(CollectionStringConstructorProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForSortedSetOfTypeThatHasStringConstructor() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory.createTypeProducer(SortedSet.class, ParameterizedTypeImpl
                        .newParameterizedType(SortedSet.class, StringConstructorClass.class));
        assertEquals(CollectionStringConstructorProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForListOfTypeThatHasStringValueOfMethod() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory
                        .createTypeProducer(List.class, ParameterizedTypeImpl.newParameterizedType(List.class, ValueOfStringClass.class));
        assertEquals(CollectionStringValueOfProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForSetOfTypeThatHasStringValueOfMethod() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory
                        .createTypeProducer(Set.class, ParameterizedTypeImpl.newParameterizedType(Set.class, ValueOfStringClass.class));
        assertEquals(CollectionStringValueOfProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForSortedSetOfTypeThatHasStringValueOfMethod() throws Exception {
        TypeProducer typeProducer =
                typeProducerFactory.createTypeProducer(SortedSet.class,
                                                   ParameterizedTypeImpl.newParameterizedType(SortedSet.class, ValueOfStringClass.class));
        assertEquals(CollectionStringValueOfProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForPrimitiveType() throws Exception {
        TypeProducer typeProducer = typeProducerFactory.createTypeProducer(int.class, null);
        assertEquals(PrimitiveTypeProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForString() throws Exception {
        TypeProducer typeProducer = typeProducerFactory.createTypeProducer(String.class, null);
        assertEquals(StringProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForTypeThatHasStringConstructor() throws Exception {
        TypeProducer typeProducer = typeProducerFactory.createTypeProducer(StringConstructorClass.class, null);
        assertEquals(StringConstructorProducer.class, typeProducer.getClass());
    }

    @Test
    public void createsProducerForTypeThatHasStringValueOfMethod() throws Exception {
        TypeProducer typeProducer = typeProducerFactory.createTypeProducer(ValueOfStringClass.class, null);
        assertEquals(StringValueOfProducer.class, typeProducer.getClass());
    }

    @Test(expected = IllegalArgumentException.class)
    public void throwsExceptionWhenNeitherStringConstructorNorStringValueOfMethodAvailable() throws Exception {
        typeProducerFactory.createTypeProducer(NoStringConstructorNoValueOfClass.class, null);
    }

    public static class StringConstructorClass {
        public StringConstructorClass(String value) {
        }
    }

    public static class ValueOfStringClass {
        public static ValueOfStringClass valueOf(String value) {
            return new ValueOfStringClass();
        }
    }

    public static class NoStringConstructorNoValueOfClass {
    }

}