nifi-nar-bundles/nifi-graph-bundle/nifi-graph-processors/src/test/java/org/apache/nifi/processors/graph/TestExecuteGraphQuery.java

/*
 * 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.apache.nifi.processors.graph;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.nifi.graph.GraphClientService;
import org.apache.nifi.util.MockFlowFile;
import org.apache.nifi.util.TestRunner;
import org.apache.nifi.util.TestRunners;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

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

/**
 * Cypher unit tests.
 */
public class TestExecuteGraphQuery {
    protected TestRunner runner;

    @BeforeEach
    public void setUp() throws Exception {
        MockCypherClientService service = new MockCypherClientService();
        runner = TestRunners.newTestRunner(ExecuteGraphQuery.class);
        runner.addControllerService("clientService", service);
        runner.enableControllerService(service);
        runner.setProperty(AbstractGraphExecutor.CLIENT_SERVICE, "clientService");
        runner.setProperty(AbstractGraphExecutor.QUERY, "match (n) return n");
    }

    @Test
    public void testExecuteFromParameter() throws Exception {
        runner.setProperty(AbstractGraphExecutor.QUERY, "MATCH (p:person) RETURN p");
        testExecute(1, 0, 0);
    }

    @Test
    public void testExecuteFromBody() throws Exception {
        runner.enqueue("MATCH (p:person) RETURN p");
        testExecute(1, 0, 1);
    }

    @Test
    public void testExecuteFromParameterWithEL() throws Exception {
        runner.setProperty(AbstractGraphExecutor.QUERY, "${query}");
        runner.enqueue("test-data", new HashMap<String, String>(){{
            put("query", "MATCH (p:person) RETURN p");
        }});
        testExecute(1, 0, 1);
    }

    private void testExecute(int success, int failure, int original) throws Exception {
        runner.run(1,true,true);
        runner.assertTransferCount(ExecuteGraphQuery.REL_SUCCESS, success);
        runner.assertTransferCount(ExecuteGraphQuery.REL_FAILURE, failure);
        runner.assertTransferCount(ExecuteGraphQuery.REL_ORIGINAL, original);
        List<MockFlowFile> flowFiles = runner.getFlowFilesForRelationship(ExecuteGraphQuery.REL_SUCCESS);
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.LABELS_ADDED));
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.NODES_CREATED));
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.NODES_DELETED));
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.RELATIONS_CREATED));
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.RELATIONS_DELETED));
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.PROPERTIES_SET));
        assertEquals("1",flowFiles.get(0).getAttribute(GraphClientService.ROWS_RETURNED));
        byte[] raw = runner.getContentAsByteArray(flowFiles.get(0));
        String str = new String(raw);
        List<Map<String, Object>> parsed = new ObjectMapper().readValue(str, List.class);
        assertNotNull(parsed);
        assertEquals(2, parsed.size());
        for (Map<String, Object> result : parsed) {
            assertEquals(2, result.size());
            assertTrue(result.containsKey("name"));
            assertTrue(result.containsKey("age"));
        }
    }
}