source: josm/trunk/test/unit/org/openstreetmap/josm/actions/JoinAreasActionTest.java@ 11738

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.actions;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

import org.junit.Rule;
import org.junit.Test;
import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.TestUtils;
import org.openstreetmap.josm.actions.search.SearchAction;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.Relation;
import org.openstreetmap.josm.data.osm.RelationMember;
import org.openstreetmap.josm.data.osm.Way;
import org.openstreetmap.josm.gui.layer.Layer;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
import org.openstreetmap.josm.io.IllegalDataException;
import org.openstreetmap.josm.io.OsmReader;
import org.openstreetmap.josm.testutils.JOSMTestRules;
import org.openstreetmap.josm.tools.MultiMap;
import org.openstreetmap.josm.tools.Utils;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

/**
 * Unit tests of {@link JoinAreasAction} class.
 */
public class JoinAreasActionTest {

    /**
     * Setup test.
     */
    @Rule
    @SuppressFBWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
    public JOSMTestRules test = new JOSMTestRules().commands();

    /**
     * Non-regression test for bug #10511.
     * @throws IOException if any I/O error occurs
     * @throws IllegalDataException if OSM parsing fails
     */
    @Test
    public void testTicket10511() throws IOException, IllegalDataException {
        try (InputStream is = TestUtils.getRegressionDataStream(10511, "10511_mini.osm")) {
            DataSet ds = OsmReader.parseDataSet(is, null);
            Layer layer = new OsmDataLayer(ds, null, null);
            Main.getLayerManager().addLayer(layer);
            try {
                new JoinAreasAction().join(ds.getWays());
            } finally {
                // Ensure we clean the place before leaving, even if test fails.
                Main.getLayerManager().removeLayer(layer);
            }
        }
    }

    /**
     * Non-regression test for bug #11992.
     * @throws IOException if any I/O error occurs
     * @throws IllegalDataException if OSM parsing fails
     */
    @Test
    public void testTicket11992() throws IOException, IllegalDataException {
        try (InputStream is = TestUtils.getRegressionDataStream(11992, "shapes.osm")) {
            DataSet ds = OsmReader.parseDataSet(is, null);
            assertEquals(10, ds.getWays().size());
            Layer layer = new OsmDataLayer(ds, null, null);
            Main.getLayerManager().addLayer(layer);
            for (String ref : new String[]{"A", "B", "C", "D", "E"}) {
                System.out.print("Joining ways " + ref);
                Collection<OsmPrimitive> found = SearchAction.searchAndReturn("type:way ref="+ref, SearchAction.SearchMode.replace);
                assertEquals(2, found.size());

                Main.main.menu.joinAreas.join(Utils.filteredCollection(found, Way.class));

                Collection<OsmPrimitive> found2 = SearchAction.searchAndReturn("type:relation ref="+ref, SearchAction.SearchMode.replace);
                assertEquals(1, found2.size());
                System.out.println(" ==> OK");
            }
        }
    }

    @Test
    public void testExamples() throws Exception {
        DataSet dsToJoin, dsExpected;
        try (InputStream is = new FileInputStream("data_nodist/Join_Areas_Tests.osm")) {
            dsToJoin = OsmReader.parseDataSet(is, NullProgressMonitor.INSTANCE);
        }
        try (InputStream is = new FileInputStream("data_nodist/Join_Areas_Tests_joined.osm")) {
            dsExpected = OsmReader.parseDataSet(is, NullProgressMonitor.INSTANCE);
        }
        Collection<OsmPrimitive> testPrims = dsToJoin.getPrimitives(osm -> osm.get("test") != null);
        MultiMap<String, OsmPrimitive> tests = new MultiMap<>();
        for (OsmPrimitive testPrim : testPrims) {
            tests.put(testPrim.get("test"), testPrim);
        }
        for (String test : tests.keySet()) {
            Collection<OsmPrimitive> primitives = tests.get(test);
            for (OsmPrimitive osm : primitives) {
                assertTrue(test + "; expected way, but got: " + osm, osm instanceof Way);
            }
            new JoinAreasAction().join((Collection) primitives);
            Collection<OsmPrimitive> joinedCol = dsToJoin.getPrimitives(osm -> !osm.isDeleted() && Objects.equals(osm.get("test"), test));
            assertEquals("in test " + test + ":", 1, joinedCol.size());
            Collection<OsmPrimitive> expectedCol = dsExpected.getPrimitives(osm -> !osm.isDeleted() && Objects.equals(osm.get("test"), test));
            assertEquals("in test " + test + ":", 1, expectedCol.size());
            OsmPrimitive osmJoined = joinedCol.iterator().next();
            OsmPrimitive osmExpected = expectedCol.iterator().next();
            assertTrue("difference in test " + test, isSemanticallyEqual(osmExpected, osmJoined));
        }
    }

    /**
     * Check if 2 primitives are semantically equal as result of a join areas
     * operation.
     * @param osm1 first primitive
     * @param osm2 second primitive
     * @return true if both primitives are semantically equal
     */
    private boolean isSemanticallyEqual(OsmPrimitive osm1, OsmPrimitive osm2) {
        if (osm1 instanceof Node && osm2 instanceof Node)
            return isSemanticallyEqualNode((Node) osm1, (Node) osm2);
        if (osm1 instanceof Way && osm2 instanceof Way)
            return isSemanticallyEqualWay((Way) osm1, (Way) osm2);
        if (osm1 instanceof Relation && osm2 instanceof Relation)
            return isSemanticallyEqualRelation((Relation) osm1, (Relation) osm2);
        return false;
    }

    private boolean isSemanticallyEqualRelation(Relation r1, Relation r2) {
        if (!r1.getKeys().equals(r2.getKeys())) return false;
        if (r1.getMembersCount() != r2.getMembersCount()) return false;
        Set<RelationMember> matchCandidates = new HashSet<>(r2.getMembers());
        for (RelationMember rm : r1.getMembers()) {
            RelationMember matched = null;
            for (RelationMember cand : matchCandidates) {
                if (!rm.getRole().equals(cand.getRole())) continue;
                if (!isSemanticallyEqual(rm.getMember(), cand.getMember())) continue;
                matched = cand;
                break;
            }
            if (matched == null) return false;
            matchCandidates.remove(matched);
        }
        return true;
    }

    private boolean isSemanticallyEqualWay(Way w1, Way w2) {
        if (!w1.isClosed() || !w2.isClosed()) throw new UnsupportedOperationException();
        if (!w1.getKeys().equals(w2.getKeys())) return false;
        if (w1.getNodesCount() != w2.getNodesCount()) return false;
        int n = w1.getNodesCount() - 1;
        for (int dir : Arrays.asList(1, -1)) {
            for (int i = 0; i < n; i++) {
                boolean different = false;
                for (int j = 0; j < n; j++) {
                    Node n1 = w1.getNode(j);
                    Node n2 = w2.getNode(Utils.mod(i + dir*j, n));
                    if (!isSemanticallyEqualNode(n1, n2)) {
                        different = true;
                        break;
                    }
                }
                if (!different)
                    return true;
            }
        }
        return false;
    }

    private boolean isSemanticallyEqualNode(Node n1, Node n2) {
        return n1.hasEqualSemanticAttributes(n2);
    }
}