TestGetSchema.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.kite;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.Charset;

import org.apache.avro.Schema;
import org.apache.avro.SchemaBuilder;
import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.kitesdk.data.DatasetDescriptor;
import org.kitesdk.data.Datasets;
import org.kitesdk.data.spi.DefaultConfiguration;

import static org.apache.nifi.processors.kite.TestUtil.bytesFor;

public class TestGetSchema {

    public static final Schema SCHEMA = SchemaBuilder.record("Test").fields()
            .requiredLong("id")
            .requiredString("color")
            .optionalDouble("price")
            .endRecord();

    @Rule
    public TemporaryFolder temp = new TemporaryFolder();

    @Test
    @Ignore("Does not work on windows")
    public void testSchemaFromFileSystem() throws IOException {
        File schemaFile = temp.newFile("schema.avsc");
        FileOutputStream out = new FileOutputStream(schemaFile);
        out.write(bytesFor(SCHEMA.toString(), Charset.forName("utf8")));
        out.close();

        Schema schema = AbstractKiteProcessor.getSchema(
                schemaFile.toString(), DefaultConfiguration.get());

        Assert.assertEquals("Schema from file should match", SCHEMA, schema);
    }

    @Test
    @Ignore("Does not work on windows")
    public void testSchemaFromKiteURIs() throws IOException {
        String location = temp.newFolder("ns", "temp").toString();
        if (location.endsWith("/")) {
            location = location.substring(0, location.length() - 1);
        }
        String datasetUri = "dataset:" + location;
        DatasetDescriptor descriptor = new DatasetDescriptor.Builder()
                .schema(SCHEMA)
                .build();

        Datasets.create(datasetUri, descriptor);

        Schema schema = AbstractKiteProcessor.getSchema(
                datasetUri, DefaultConfiguration.get());
        Assert.assertEquals("Schema from dataset URI should match", SCHEMA, schema);

        schema = AbstractKiteProcessor.getSchema(
                "view:file:" + location + "?color=orange", DefaultConfiguration.get());
        Assert.assertEquals("Schema from view URI should match", SCHEMA, schema);
    }

    @Test
    public void testSchemaFromResourceURI() throws IOException {
        DatasetDescriptor descriptor = new DatasetDescriptor.Builder()
                .schemaUri("resource:schema/user.avsc") // in kite-data-core test-jar
                .build();
        Schema expected = descriptor.getSchema();

        Schema schema = AbstractKiteProcessor.getSchema(
                "resource:schema/user.avsc", DefaultConfiguration.get());

        Assert.assertEquals("Schema from resource URI should match",
                expected, schema);
    }
}