com.cloudera.cdk.data.TestDatasetDescriptor.java Source code

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Here is the source code for com.cloudera.cdk.data.TestDatasetDescriptor.java

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/**
 * Copyright 2013 Cloudera 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 com.cloudera.cdk.data;

import com.google.common.io.Resources;
import java.io.IOException;
import java.net.URI;
import junit.framework.Assert;
import org.apache.avro.Schema;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.junit.Test;

import static com.cloudera.cdk.data.filesystem.DatasetTestUtilities.*;

public class TestDatasetDescriptor extends MiniDFSTest {

    @Test
    public void testSchemaFromHdfs() throws IOException {
        FileSystem fs = getDFS();

        // copy a schema to HDFS
        Path schemaPath = fs.makeQualified(new Path("schema.avsc"));
        FSDataOutputStream out = fs.create(schemaPath);
        IOUtils.copyBytes(USER_SCHEMA_URL.toURL().openStream(), out, fs.getConf());
        out.close();

        // build a schema using the HDFS path and check it's the same
        Schema schema = new DatasetDescriptor.Builder().schemaUri(schemaPath.toUri()).build().getSchema();

        Assert.assertEquals(USER_SCHEMA, schema);
    }

    @Test
    public void testSchemaFromAvroDataFile() throws Exception {
        URI uri = Resources.getResource("data/strings-100.avro").toURI();
        Schema schema = new DatasetDescriptor.Builder().schemaFromAvroDataFile(uri).build().getSchema();
        Assert.assertEquals(STRING_SCHEMA, schema);
    }

    @Test
    public void testSchemaFromResourceURI() throws Exception {
        String uri = "resource:standard_event.avsc";
        DatasetDescriptor descriptor = new DatasetDescriptor.Builder().schemaUri(uri).build();

        Assert.assertNotNull(descriptor);
        Assert.assertNotNull(descriptor.getSchema());
    }
}