public static void verifyMapReduce(
SmartMapper mapper, SmartReducer reducer, Object key, Object input) throws Exception {
MapDriver mapDriver = new MapDriver();
mapDriver.setMapper(mapper);
MapReduceDriver mapReduceDriver = new MapReduceDriver();
mapReduceDriver.setMapper(mapper);
Object writableKey = createWritable(key, mapper.getKeyInType());
Object writableValue = createWritable(input, mapper.getValueInType());
mapDriver.withInput(writableKey, writableValue);
List results = mapDriver.run();
Collections.sort(results, PairComparer.INSTANCE);
mapReduceDriver =
new MapReduceDriver<LongWritable, Text, Text, LongWritable, Text, LongWritable>();
writableKey = createWritable(key, mapper.getKeyInType());
writableValue = createWritable(input, mapper.getValueInType());
mapReduceDriver.withInput(writableKey, writableValue);
mapReduceDriver.setMapper(mapper);
mapReduceDriver.setReducer(reducer);
List finalResults = mapReduceDriver.run();
String text =
String.format(
"[%s]\r\n\r\n -> maps via %s to -> \r\n\r\n%s\r\n\r\n -> reduces via %s to -> \r\n\r\n%s",
input,
mapper.getClass().getSimpleName(),
ArrayUtils.toString(results, Echo.INSTANCE),
reducer.getClass().getSimpleName(),
ArrayUtils.toString(finalResults, Echo.INSTANCE));
Approvals.verify(text);
}
public static void verifyReducer(SmartReducer reducer, Object key, Object... values)
throws Exception {
List list = new ArrayList();
for (Object value : values) {
list.add(createWritable(value, reducer.getValueInType()));
}
ReduceDriver reduceDriver = new ReduceDriver<Text, LongWritable, Text, LongWritable>();
reduceDriver.withInput(createWritable(key, reducer.getKeyInType()), list);
reduceDriver.setReducer(reducer);
List results = reduceDriver.run();
Collections.sort(results, PairComparer.INSTANCE);
String header =
String.format(
"(%s, %s)\r\n\r\n -> reduces via %s to -> \r\n",
key, list, reducer.getClass().getSimpleName());
Approvals.verifyAll(header, results, Echo.INSTANCE);
}