/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2007-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 */
package org.geotools.resources;

import java.io.*;
import java.util.Set;
import java.util.HashSet;

import org.junit.*;
import static org.junit.Assert.*;


/**
 * Tests the {@link Classes} static methods.
 *
 *
 * @source $URL$
 * @version $Id$
 * @author Martin Desruisseaux
 */
public final class ClassesTest {
    /**
     * Tests {@link Classes#mostSpecificClass} and {@link Classes#commonClass}.
     */
    @Test
    public void testCommonParent() {
        final Set<Object> types = new HashSet<Object>();

        assertTrue(types.add(new NotSerializableException()));
        assertEquals(NotSerializableException.class, Classes.commonClass     (types));
        assertEquals(NotSerializableException.class, Classes.specializedClass(types));

        assertTrue(types.add(new InvalidObjectException(null)));
        assertEquals(ObjectStreamException.class, Classes.commonClass     (types));
        assertEquals(ObjectStreamException.class, Classes.specializedClass(types));

        assertTrue(types.add(new FileNotFoundException()));
        assertEquals(IOException.class, Classes.commonClass     (types));
        assertEquals(IOException.class, Classes.specializedClass(types));

        assertTrue(types.add(new IOException()));
        assertEquals(IOException.class, Classes.commonClass     (types));
        assertEquals(IOException.class, Classes.specializedClass(types));

        assertTrue(types.add(new Exception()));
        assertEquals(  Exception.class, Classes.commonClass     (types));
        assertEquals(IOException.class, Classes.specializedClass(types));
    }

    /**
     * Tests {@link Classes#sameInterfaces}.
     */
    @Test
    @SuppressWarnings("unchecked") // We break consistency on purpose for one test.
    public void testSameInterfaces() {
        assertTrue (Classes.sameInterfaces(StringBuilder.class, String.class, CharSequence.class));
        assertTrue (Classes.sameInterfaces(StringBuilder.class, String.class, Serializable.class));
        assertFalse(Classes.sameInterfaces((Class)  File.class, String.class, CharSequence.class));
        assertTrue (Classes.sameInterfaces(         File.class, String.class, Serializable.class));
    }

    /**
     * Tests the {@link #boundOfParameterizedAttribute} method.
     *
     * @throws NoSuchFieldException  Should never occur.
     * @throws NoSuchMethodException Should never occur.
     */
    @Test
    public void testBoundOfParameterizedAttribute()
            throws NoSuchFieldException, NoSuchMethodException
    {
        final Class<?>[] g = null;
        final Class<?>[] s = new Class[] {Set.class};
        final Class<ClassesTest> c = ClassesTest.class;
        assertNull(Classes.boundOfParameterizedAttribute(c.getMethod("getter0", g)));
        assertNull(Classes.boundOfParameterizedAttribute(c.getMethod("setter0", s)));
        assertEquals(Long   .class, Classes.boundOfParameterizedAttribute(c.getField ("attrib2"   )));
        assertEquals(Integer.class, Classes.boundOfParameterizedAttribute(c.getMethod("getter1", g)));
        assertEquals(Byte   .class, Classes.boundOfParameterizedAttribute(c.getMethod("getter2", g)));
        assertEquals(Object .class, Classes.boundOfParameterizedAttribute(c.getMethod("getter3", g)));
        assertEquals(String .class, Classes.boundOfParameterizedAttribute(c.getMethod("setter1", s)));
        assertEquals(Short  .class, Classes.boundOfParameterizedAttribute(c.getMethod("setter2", s)));
        assertEquals(Object .class, Classes.boundOfParameterizedAttribute(c.getMethod("setter3", s)));
    }

    public Set<? extends Long> attrib2 = null;
    public Set                 getter0() {return null;}
    public Set<       Integer> getter1() {return null;}
    public Set<? extends Byte> getter2() {return null;}
    public Set<? super  Float> getter3() {return null;}
    public void setter0(Set                  dummy) {}
    public void setter1(Set<         String> dummy) {}
    public void setter2(Set<? extends Short> dummy) {}
    public void setter3(Set<? super  Double> dummy) {}
}