@Test
public void testMatrixDiagonalizeMapper() throws Exception {
MatrixDiagonalizeMapper mapper = new MatrixDiagonalizeMapper();
Configuration conf = getConfiguration();
conf.setInt(Keys.AFFINITY_DIMENSIONS, RAW_DIMENSIONS);
// set up the dummy writers
DummyRecordWriter<NullWritable, IntDoublePairWritable> writer = new DummyRecordWriter<>();
Mapper<IntWritable, VectorWritable, NullWritable, IntDoublePairWritable>.Context context =
DummyRecordWriter.build(mapper, conf, writer);
// perform the mapping
for (int i = 0; i < RAW_DIMENSIONS; i++) {
RandomAccessSparseVector toAdd = new RandomAccessSparseVector(RAW_DIMENSIONS);
toAdd.assign(RAW[i]);
mapper.map(new IntWritable(i), new VectorWritable(toAdd), context);
}
// check the number of the results
assertEquals(
"Number of map results", RAW_DIMENSIONS, writer.getValue(NullWritable.get()).size());
}
@Test
public void testMatrixDiagonalizeReducer() throws Exception {
MatrixDiagonalizeMapper mapper = new MatrixDiagonalizeMapper();
Configuration conf = getConfiguration();
conf.setInt(Keys.AFFINITY_DIMENSIONS, RAW_DIMENSIONS);
// set up the dummy writers
DummyRecordWriter<NullWritable, IntDoublePairWritable> mapWriter = new DummyRecordWriter<>();
Mapper<IntWritable, VectorWritable, NullWritable, IntDoublePairWritable>.Context mapContext =
DummyRecordWriter.build(mapper, conf, mapWriter);
// perform the mapping
for (int i = 0; i < RAW_DIMENSIONS; i++) {
RandomAccessSparseVector toAdd = new RandomAccessSparseVector(RAW_DIMENSIONS);
toAdd.assign(RAW[i]);
mapper.map(new IntWritable(i), new VectorWritable(toAdd), mapContext);
}
// now perform the reduction
MatrixDiagonalizeReducer reducer = new MatrixDiagonalizeReducer();
DummyRecordWriter<NullWritable, VectorWritable> redWriter = new DummyRecordWriter<>();
Reducer<NullWritable, IntDoublePairWritable, NullWritable, VectorWritable>.Context redContext =
DummyRecordWriter.build(
reducer, conf, redWriter, NullWritable.class, IntDoublePairWritable.class);
// only need one reduction
reducer.reduce(NullWritable.get(), mapWriter.getValue(NullWritable.get()), redContext);
// first, make sure there's only one result
List<VectorWritable> list = redWriter.getValue(NullWritable.get());
assertEquals("Only a single resulting vector", 1, list.size());
Vector v = list.get(0).get();
for (int i = 0; i < v.size(); i++) {
assertEquals("Element sum is correct", rowSum(RAW[i]), v.get(i), 0.01);
}
}