@Test
public void testReduce() throws Exception {
List<IntWritable> counts = new ArrayList<IntWritable>();
counts.add(new IntWritable(2));
PairsRelativeOccurrenceReducer reducer = new PairsRelativeOccurrenceReducer();
Field f = reducer.getClass().getDeclaredField("totalCount");
f.setAccessible(true);
DoubleWritable dw = (DoubleWritable) f.get(reducer);
dw.set(2);
new ReduceDriver<WordPair, IntWritable, WordPair, DoubleWritable>()
.withReducer(reducer)
.withInput(new WordPair("apple", "nut"), counts)
.withOutput(new WordPair("apple", "nut"), new DoubleWritable(1.0))
.runTest();
}
@Test
public void testReduceStar() throws Exception {
List<IntWritable> allCounts = new ArrayList<IntWritable>();
allCounts.add(new IntWritable(4));
PairsRelativeOccurrenceReducer reducer = new PairsRelativeOccurrenceReducer();
new ReduceDriver<WordPair, IntWritable, WordPair, DoubleWritable>()
.withReducer(reducer)
.withInput(new WordPair("apple", "*"), allCounts)
.runTest();
Field f = reducer.getClass().getDeclaredField("totalCount");
f.setAccessible(true);
DoubleWritable dw = (DoubleWritable) f.get(reducer);
assertThat(dw.get(), is((double) 4));
f = reducer.getClass().getDeclaredField("currentWord");
f.setAccessible(true);
assertThat((f.get(reducer)).toString(), is("apple"));
}