/*
 * 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.sparql.algebra.optimize;

import static org.apache.jena.sparql.algebra.optimize.TransformTests.testOp;

import org.junit.jupiter.api.Test;

import org.apache.jena.sparql.algebra.Transform;
import org.apache.jena.sparql.engine.optimizer.reorder.ReorderLib;

/** Test BGP reordering using the fixed reordering algorithm */
public class TestReorderBGP {
    private static Transform t_reorder = new TransformReorder(ReorderLib.fixed());

    public TestReorderBGP() {}

    @Test public void reorderbgp_1_1() {
        testOp("(bgp (?s :p ?o))", t_reorder, "(bgp (?s :p ?o))");
    }

    @Test public void reorderbgp_1_2() {
        testOp("(bgp (?s ?p ?o))", t_reorder, "(bgp (?s ?p ?o))");
    }

    @Test public void reorderbgp_2_1() {
        testOp("(bgp (?s :p ?o) (?s :p 123) )", t_reorder, "(bgp (?s :p 123) (?s :p ?o))");
    }

    @Test public void reorderbgp_2_2() {
        testOp("(bgp (?s :p 123) (?s :p ?o) )", t_reorder, "(bgp (?s :p 123) (?s :p ?o))");
    }

    @Test public void reorderbgp_2_3() {
        testOp("(bgp (?s :p 123) (?s rdf:type :T) )", t_reorder, "(bgp (?s :p 123) (?s rdf:type :T))");
    }

    @Test public void reorderbgp_2_4() {
        testOp("(bgp (?s rdf:type :T) (?s :p 123) )", t_reorder, "(bgp (?s :p 123) (?s rdf:type :T))");
    }

    private static String expected3 = "(bgp (?s :p 123) (?s rdf:type :T) (?s :p ?o) )";

    @Test public void reorderbgp_3_1() {
        testOp("(bgp (?s rdf:type :T) (?s :p ?o) (?s :p 123) )",
             t_reorder, expected3);
    }

    @Test public void reorderbgp_3_2() {
        testOp("(bgp (?s :p ?o) (?s :p 123) (?s rdf:type :T) )",
               t_reorder, expected3);
      }

    @Test public void reorderbgp_3_3() {
        testOp("(bgp (?s :p 123) (?s rdf:type :T) (?s :p ?o) )",
               t_reorder, expected3);
      }

    @Test public void reorderbgp_3_4() {
        testOp("(bgp (?s rdf:type :T) (?s :p 123) (?s :p ?o) )",
               t_reorder, expected3);
      }

    @Test public void reorderbgp_3_5() {
        testOp("(bgp (?s :p 123) (?s :p ?o) (?s rdf:type :T))",
               t_reorder, expected3);
      }
    @Test public void reorderbgp_3_6() {
        testOp("(bgp (?s :p ?o) (?s rdf:type :T) (?s :p 123)  )",
               t_reorder, expected3);
      }
}
