io.fineo.drill.rule.TestDrill.java Source code

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Here is the source code for io.fineo.drill.rule.TestDrill.java

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/*
 *    Copyright 2016 Fineo, Inc.
 *
 *    Licensed 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 io.fineo.drill.rule;

import com.fasterxml.jackson.jr.ob.JSON;
import org.apache.drill.jdbc.Driver;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

import java.io.File;
import java.sql.Connection;
import java.sql.ResultSet;
import java.util.HashMap;
import java.util.Map;

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

/**
 * Simple test to ensure that drill rules work as expected
 */
public class TestDrill {

    @ClassRule
    public static DrillClusterRule drill = new DrillClusterRule(1);

    @Rule
    public TemporaryFolder folder = new TemporaryFolder();

    @BeforeClass
    public static void setup() {
        Driver.load();
    }

    @Test
    public void testReadWrite() throws Exception {
        // writer a simple json file
        Map<String, Object> json = new HashMap<>();
        json.put("a", "c");

        File tmp = folder.newFolder("drill");
        File out = new File(tmp, "test.json");
        JSON j = JSON.std;
        j.write(json, out);

        try (Connection conn = drill.getConnection()) {
            conn.createStatement().execute("ALTER SESSION SET `store.format`='json'");
            String select = String.format("SELECT * FROM dfs.`%s`", out.getPath());
            ResultSet results = conn.createStatement().executeQuery(select);
            assertTrue(results.next());
            assertEquals(json.get("a"), results.getString("a"));
            assertEquals(1, results.getMetaData().getColumnCount());
        }
    }
}