/*
* 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.pig.test.pigunit;
import java.io.File;
import java.io.IOException;
import junit.framework.TestCase;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.fs.Path;
import org.apache.pig.pigunit.Cluster;
import org.apache.pig.pigunit.PigTest;
import org.apache.pig.pigunit.pig.PigServer;
import org.apache.pig.tools.parameters.ParseException;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
/**
* <p>Various examples about how to use PigUnit.
*
* <p>Requires in CLASSPATH:
* <ul>
* <li>pig.jar</li>
* <li>pigunit.jar</li>
* <li>$HADOOP_CONF_DIR to current/future cluster if not using LOCAL mode</li>
* </ul>
*/
public class TestPigTest {
private PigTest test;
private static Cluster cluster;
private static final String PIG_SCRIPT = "test/data/pigunit/top_queries.pig";
@BeforeClass
public static void setUpOnce() throws IOException {
cluster = PigTest.getCluster();
cluster.update(
new Path("test/data/pigunit/top_queries_input_data.txt"),
new Path("top_queries_input_data.txt"));
}
@Test
public void testNtoN() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
String[] output = {
"(yahoo,25)",
"(facebook,15)",
"(twitter,7)",
};
test.assertOutput("queries_limit", output);
}
@Test
public void testImplicitNtoN() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
String[] output = {
"(yahoo,25)",
"(facebook,15)",
"(twitter,7)",
};
test.assertOutput(output);
}
@Test
public void testTextInput() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
String[] input = {
"yahoo\t10",
"twitter\t7",
"facebook\t10",
"yahoo\t15",
"facebook\t5",
"a\t1",
"b\t2",
"c\t3",
"d\t4",
"e\t5",
};
String[] output = {
"(yahoo,25)",
"(facebook,15)",
"(twitter,7)",
};
test.assertOutput("data", input, "queries_limit", output);
}
@Test
public void testSubset() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
String[] input = {
"yahoo\t10",
"twitter\t7",
"facebook\t10",
"yahoo\t15",
"facebook\t5",
"a\t1",
"b\t2",
"c\t3",
"d\t4",
"e\t5",
};
String[] output = {
"(yahoo,25)",
"(facebook,15)",
"(twitter,7)",
};
test.assertOutput("data", input, "queries_limit", output);
}
@Test
public void testOverride() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
test.override("queries_limit", "queries_limit = LIMIT queries_ordered 2;");
String[] output = {
"(yahoo,25)",
"(facebook,15)",
};
test.assertOutput(output);
}
@Test
public void testInlinePigScript() throws ParseException, IOException {
String[] script = {
"data = LOAD 'top_queries_input_data.txt' AS (query:CHARARRAY, count:INT);",
"queries_group = GROUP data BY query PARALLEL 1;",
"queries_sum = FOREACH queries_group GENERATE group AS query, SUM(data.count) AS count;",
"queries_ordered = ORDER queries_sum BY count DESC PARALLEL 1;",
"queries_limit = LIMIT queries_ordered 3;",
"STORE queries_limit INTO 'top_3_queries';",
};
test = new PigTest(script);
String[] output = {
"(yahoo,25)",
"(facebook,15)",
"(twitter,7)",
};
test.assertOutput(output);
}
@Test
public void testFileOutput() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
test.assertOutput(new File("test/data/pigunit/top_queries_expected_top_3.txt"));
}
@Test
public void testArgFiles() throws ParseException, IOException {
String[] argsFile = {
"test/data/pigunit/top_queries_params.txt"
};
test = new PigTest(PIG_SCRIPT, null, argsFile);
test.assertOutput(new File("test/data/pigunit/top_queries_expected_top_3.txt"));
}
@Test
public void testGetLastAlias() throws ParseException, IOException {
String[] script = {
"data = LOAD 'top_queries_input_data.txt' AS (query:CHARARRAY, count:INT);",
"queries_group = GROUP data BY query PARALLEL 1;",
"queries_sum = FOREACH queries_group GENERATE group AS query, SUM(data.count) AS count;",
"queries_ordered = ORDER queries_sum BY count DESC PARALLEL 1;",
"queries_limit = LIMIT queries_ordered 3;",
"STORE queries_limit INTO 'top_3_queries';",
};
test = new PigTest(script);
String expected =
"(yahoo,25)\n" +
"(facebook,15)\n" +
"(twitter,7)";
TestCase.assertEquals(expected, StringUtils.join(test.getAlias("queries_limit"), "\n"));
}
@Test
public void testWithUdf() throws ParseException, IOException {
String[] script = {
// "REGISTER myIfNeeded.jar;",
"DEFINE TOKENIZE TOKENIZE();",
"data = LOAD 'top_queries_input_data.txt' AS (query:CHARARRAY, count:INT);",
"queries = FOREACH data GENERATE query, TOKENIZE(query) AS query_tokens;",
"queries_ordered = ORDER queries BY query DESC PARALLEL 1;",
"queries_limit = LIMIT queries_ordered 3;",
"STORE queries_limit INTO 'top_3_queries';",
};
test = new PigTest(script);
String[] output = {
"(yahoo,{(yahoo)})",
"(yahoo,{(yahoo)})",
"(twitter,{(twitter)})",
};
test.assertOutput(output);
}
@Test
public void testStore() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
test = new PigTest(PIG_SCRIPT, args);
// By default PigUnit removes all the STORE and DUMP
test.unoverride("STORE");
test.runScript();
TestCase.assertTrue(cluster.delete(new Path("top_3_queries")));
}
@Ignore("Not ready yet")
@Test
public void testWithMock() throws ParseException, IOException {
String[] args = {
"n=3",
"reducers=1",
"input=top_queries_input_data.txt",
"output=top_3_queries",
};
PigServer mockServer = null;
Cluster mockCluster = null;
test = new PigTest(PIG_SCRIPT, args, mockServer, mockCluster);
test.assertOutput(new File("data/top_queries_expected_top_3.txt"));
}
}