gremlin-python/src/test/java/org/apache/tinkerpop/gremlin/python/structure/io/graphson/GraphSONWriterTest.java

/*
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 *  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.apache.tinkerpop.gremlin.python.structure.io.graphson;

import org.apache.tinkerpop.gremlin.process.remote.traversal.DefaultRemoteTraverser;
import org.apache.tinkerpop.gremlin.process.traversal.Bytecode;
import org.apache.tinkerpop.gremlin.process.traversal.P;
import org.apache.tinkerpop.gremlin.process.traversal.Pop;
import org.apache.tinkerpop.gremlin.process.traversal.Scope;
import org.apache.tinkerpop.gremlin.process.traversal.Traverser;
import org.apache.tinkerpop.gremlin.process.traversal.util.AndP;
import org.apache.tinkerpop.gremlin.python.jsr223.JythonScriptEngineSetup;
import org.apache.tinkerpop.gremlin.structure.Column;
import org.apache.tinkerpop.gremlin.structure.T;
import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONMapper;
import org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONVersion;
import org.apache.tinkerpop.gremlin.util.function.Lambda;
import org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper;
import org.junit.Ignore;
import org.junit.Test;
import org.python.jsr223.PyScriptEngine;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

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

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
@Ignore
public class GraphSONWriterTest {

    private static final Set<GraphSONVersion> VERSIONS = new HashSet<>(Arrays.asList(GraphSONVersion.V2_0, GraphSONVersion.V3_0));

    @Test
    public void shouldSerializeNumbers() throws Exception {
        for (final GraphSONVersion version : VERSIONS) {
            final ScriptEngine jythonEngine = JythonScriptEngineSetup.setup((PyScriptEngine) new ScriptEngineManager().getEngineByName("jython"));
            jythonEngine.eval("graphson_writer = " + (version.equals(GraphSONVersion.V2_0) ? "graphsonV2d0_writer" : "graphsonV3d0_writer"));
            final ObjectMapper mapper = GraphSONMapper.build().version(version).create().createMapper();
            //
            assertEquals(1, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(1)").toString(), Object.class));
            assertEquals(mapper.writeValueAsString(1), jythonEngine.eval("graphson_writer.writeObject(1)").toString().replace(" ", ""));
            //
            assertEquals(2L, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(2L)").toString(), Object.class));
            assertEquals(mapper.writeValueAsString(2L), jythonEngine.eval("graphson_writer.writeObject(2L)").toString().replace(" ", ""));
            //
            assertEquals(3.4, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(3.4)").toString(), Object.class));
            assertEquals(mapper.writeValueAsString(3.4), jythonEngine.eval("graphson_writer.writeObject(3.4)").toString().replace(" ", ""));
        }
    }

    @Test
    public void shouldSerializeCollections() throws Exception {
        for (final GraphSONVersion version : VERSIONS) {
            final ScriptEngine jythonEngine = JythonScriptEngineSetup.setup((PyScriptEngine) new ScriptEngineManager().getEngineByName("jython"));
            jythonEngine.eval("graphson_writer = " + (version.equals(GraphSONVersion.V2_0) ? "graphsonV2d0_writer" : "graphsonV3d0_writer"));
            final ObjectMapper mapper = GraphSONMapper.build().version(version).create().createMapper();
            //
            final Map<String, Number> map = new LinkedHashMap<>();
            map.put("a", 2);
            map.put("b", 2.3);
            assertEquals(map, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject({'a':2,'b':2.3})").toString(), Object.class));
            //
            final List<Object> list = Arrays.asList(new DefaultRemoteTraverser<>("hello", 3L), "hello", map, true);
            assertTrue((Boolean) jythonEngine.eval("isinstance([Traverser('hello',3L),'hello',{'a':2,'b':2.3},True],list)"));
            assertEquals(list, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject([Traverser('hello',3L),'hello',{'a':2,'b':2.3},True])").toString(), Object.class));
        }
    }

    @Test
    public void shouldSerializeTraverser() throws Exception {
        for (final GraphSONVersion version : VERSIONS) {
            final ScriptEngine jythonEngine = JythonScriptEngineSetup.setup((PyScriptEngine) new ScriptEngineManager().getEngineByName("jython"));
            jythonEngine.eval("graphson_writer = " + (version.equals(GraphSONVersion.V2_0) ? "graphsonV2d0_writer" : "graphsonV3d0_writer"));
            final ObjectMapper mapper = GraphSONMapper.build().version(version).create().createMapper();
            //
            assertEquals(
                    new DefaultRemoteTraverser<>("hello", 3L),
                    mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Traverser('hello',3L))").toString(), Object.class));
            assertEquals(3L, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Traverser('hello',3L))").toString(), Traverser.class).bulk());
            assertEquals("hello", mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Traverser('hello',3L))").toString(), Traverser.class).get());
        }
    }

    @Test
    public void shouldSerializeBytecode() throws Exception {
        for (final GraphSONVersion version : VERSIONS) {
            final ScriptEngine jythonEngine = JythonScriptEngineSetup.setup((PyScriptEngine) new ScriptEngineManager().getEngineByName("jython"));
            jythonEngine.eval("graphson_writer = " + (version.equals(GraphSONVersion.V2_0) ? "graphsonV2d0_writer" : "graphsonV3d0_writer"));
            final ObjectMapper mapper = GraphSONMapper.build().version(version).create().createMapper();
            //
            assertEquals(P.eq(7L), mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(P.eq(7L))").toString(), Object.class));
            // TODO: assertEquals(mapper.writeValueAsString(P.between(1, 2).and(P.eq(7L))), jythonEngine.eval("graphson_writer.writeObject(P.eq(7L)._and(P.between(1,2)))").toString().replace(" ",""));
            assertEquals(AndP.class, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(P.eq(7L).and_(P.between(1,2)))").toString(), Object.class).getClass());
            //
            assertEquals(new Bytecode.Binding<>("a", 5L), mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Binding('a',5L))").toString(), Object.class));
            //
            for (final Column t : Column.values()) {
                assertEquals(t, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Column." + t.name() + ")").toString(), Object.class));
            }
            for (final T t : T.values()) {
                assertEquals(t, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(T." + t.name() + ")").toString(), Object.class));
            }
            assertEquals(Pop.first, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Pop.first)").toString(), Object.class));
            assertEquals(Pop.last, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Pop.last)").toString(), Object.class));
            assertEquals(Pop.all, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Pop.all_)").toString(), Object.class));
            assertEquals(Pop.mixed, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Pop.mixed)").toString(), Object.class));
            assertEquals(Scope.global, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Scope.global_)").toString(), Object.class));
            assertEquals(Scope.local, mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(Scope.local)").toString(), Object.class));
        }
    }

    @Test
    public void shouldSerializeLambda() throws Exception {
        for (final GraphSONVersion version : VERSIONS) {
            final ScriptEngine jythonEngine = JythonScriptEngineSetup.setup((PyScriptEngine) new ScriptEngineManager().getEngineByName("jython"));
            jythonEngine.eval("graphson_writer = " + (version.equals(GraphSONVersion.V2_0) ? "graphsonV2d0_writer" : "graphsonV3d0_writer"));
            final ObjectMapper mapper = GraphSONMapper.build().version(version).create().createMapper();
            //
            assertEquals(
                    Lambda.function("lambda z : 1+2", "gremlin-python"),
                    mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(lambda : 'z : 1+2')").toString(), Object.class));
            assertEquals(
                    Lambda.function("lambda z : z+ 7", "gremlin-python"),
                    mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(lambda : 'lambda z : z+ 7')").toString(), Object.class));
            assertEquals(
                    Lambda.supplier("lambda : 23", "gremlin-python"),
                    mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(lambda : 'lambda : 23')").toString(), Object.class));
            assertEquals(
                    Lambda.consumer("lambda z : z + 23", "gremlin-python"),
                    mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(lambda : 'lambda z : z + 23')").toString(), Object.class));
            assertEquals(
                    Lambda.biFunction("lambda z,y : z - y + 2", "gremlin-python"),
                    mapper.readValue(jythonEngine.eval("graphson_writer.writeObject(lambda : 'lambda z,y : z - y + 2')").toString(), Object.class));
        }
    }
}