### Question:
OrderProjectImportAdapter implements FixtureAwareRowHandler<OrderProjectImportAdapter>, ExcelMetaDataEnabled { public String deriveProjectReference() { if (getCommessa() == null) return null; if (getCentro() == null) return ProjectImportAdapter.ITA_PROJECT_PREFIX + getCommessa(); return ProjectImportAdapter.deriveProjectReference(getCommessa()); }  OrderProjectImportAdapter handle(final OrderProjectImportAdapter previousRow); String deriveOrderNumber(); void correctProgressivoCentroIfNecessary(); String deriveProjectReference(); @Override void handleRow(final OrderProjectImportAdapter previousRow);  }### Answer:
@Test public void deriveProjectNumberTest() { OrderProjectImportAdapter adapter = new OrderProjectImportAdapter(); adapter.setCommessa("106"); assertThat(adapter.deriveProjectReference()).isEqualTo("ITPR106"); }