*/
public void testMatrix() throws IOException {
// some other tests set this to null.
// set it here in case tests are run out of the usual order.
ShingleMatrixFilter.defaultSettingsCodec = new ShingleMatrixFilter.SimpleThreeDimensionalTokenSettingsCodec();
Matrix matrix = new Matrix();
matrix.new Column(tokenFactory("no", 1));
matrix.new Column(tokenFactory("surprise", 1));
matrix.new Column(tokenFactory("to", 1));
matrix.new Column(tokenFactory("see", 1));