/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.openjena.atlas.lib;

import static org.openjena.atlas.lib.ListUtils.asList ;

import java.util.HashSet ;
import java.util.List ;
import java.util.Set ;

import org.junit.Test ;
import org.openjena.atlas.junit.BaseTest ;

public class TestSetUtils extends BaseTest
{
    @Test public void set01() 
    {
        Set<Integer> x = set(1,2,3) ;
        test(x,1,2,3) ;
    }

    @Test public void set02() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(1,2,3) ;
        Set<Integer> x3 = SetUtils.intersection(x1, x2) ;
        test(x3, 1,2,3) ;
        x3 = SetUtils.intersection(x2, x1) ;
        test(x3, 1,2,3) ;
    }

    @Test public void set03() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(2,9) ;
        Set<Integer> x3 = SetUtils.intersection(x1, x2) ;
        test(x3, 2) ;
        x3 = SetUtils.intersection(x2, x1) ;
        test(x3, 2) ;
    }

    @Test public void set04() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(6,7,8) ;
        Set<Integer> x3 = SetUtils.intersection(x1, x2) ;
        test(x3) ;
        x3 = SetUtils.intersection(x2, x1) ;
        test(x3) ;
    }

    @Test public void set05() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(1,2,3) ;
        Set<Integer> x3 = SetUtils.union(x1, x2) ;
        test(x3, 1,2,3) ;
        x3 = SetUtils.union(x2, x1) ;
        test(x3, 1,2,3) ;
    }

    @Test public void set06() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(2,9) ;
        Set<Integer> x3 = SetUtils.union(x1, x2) ;
        test(x3, 1,2,3,9) ;
        x3 = SetUtils.union(x2, x1) ;
        test(x3, 1,2,3,9) ;
    }

    @Test public void set07() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set() ;
        Set<Integer> x3 = SetUtils.union(x1, x2) ;
        test(x3,1,2,3) ;
        x3 = SetUtils.union(x2, x1) ;
        test(x3,1,2,3) ;
    }

    @Test public void set08() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set() ;
        Set<Integer> x3 = SetUtils.difference(x1, x2) ;
        test(x3,1,2,3) ;
        x3 = SetUtils.difference(x2, x1) ;
        test(x3) ;
    }

    @Test public void set09() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(3) ;
        Set<Integer> x3 = SetUtils.difference(x1, x2) ;
        test(x3,1,2) ;
        x3 = SetUtils.difference(x2, x1) ;
        test(x3) ;
    }

    @Test public void set10() 
    {
        Set<Integer> x1 = set(1,2,3) ;
        Set<Integer> x2 = set(4,5,6) ;
        Set<Integer> x3 = SetUtils.difference(x1, x2) ;
        test(x3,1,2,3) ;
        x3 = SetUtils.difference(x2, x1) ;
        test(x3,4,5,6) ;
    }
    
    // --------
    
    private static Set<Integer> set(int... values)
    {
        return new HashSet<Integer>(asList(values)) ;
    }

    private void test(Set<Integer> x, int...values)
    {
        List<Integer> y = asList(values) ;
        assertEquals(y.size(), x.size()) ;
        
        for ( int i = 0; i < y.size() ; i++ )
            assertTrue(x.contains(y.get(i))) ; 
    }
}