/*
 * 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
 *
 *   https://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.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.graph.compose;

import java.util.StringTokenizer;

import junit.framework.TestSuite;
import org.apache.jena.graph.AbstractTestGraph;
import org.apache.jena.graph.Graph;
import org.apache.jena.graph.GraphMemFactory;
import org.apache.jena.graph.Triple;
import org.apache.jena.util.iterator.ExtendedIterator;
import org.apache.jena.util.iterator.NiceIterator;

public abstract class TestDyadic extends AbstractTestGraph {
    public TestDyadic(String name) {
        super(name);
    }

    public static TestSuite suite() {
        return new TestSuite(TestDyadic.class);
    }

    static private ExtendedIterator<String> things(final String x) {
        return new NiceIterator<String>() {
            private StringTokenizer tokens = new StringTokenizer(x);
            @Override
            public boolean hasNext() {
                return tokens.hasMoreTokens();
            }

            @Override
            public String next() {
                return tokens.nextToken();
            }
        };
    }

    /**
     * Test the things() iterator generating utility function.
     */
    public void testThings() {
        ExtendedIterator<String> it1 = things("now is the time");
        ExtendedIterator<String> it2 = things("now is the time");
        ExtendedIterator<String> mt1 = things("");
        ExtendedIterator<String> mt2 = things("");
        assertEquals("mt1.hasNext()", false, mt1.hasNext());
        assertEquals("mt2.hasNext()", false, mt2.hasNext());
        assertEquals("andThen(mt1,mt2).hasNext()", false, mt1.andThen(mt2).hasNext());
        assertEquals("butNot(it1,it2).hasNext()", false, CompositionBase.butNot(it1, it2).hasNext());
        assertEquals("x y z @butNot z", true, CompositionBase.butNot(things("x y z"), things("z")).hasNext());
        assertEquals("x y z @butNot a", true, CompositionBase.butNot(things("x y z"), things("z")).hasNext());
    }

    public void testDyadicOperands() {
        Graph g = GraphMemFactory.createDefaultGraph();
        Graph h = GraphMemFactory.createDefaultGraph();
        Dyadic d = new Dyadic(g, h) {
            @Override
            protected ExtendedIterator<Triple> _graphBaseFind(Triple m) {
                return null;
            }
        };
        assertSame(g, d.getL());
        assertSame(h, d.getR());
    }
}
