### Question:
MapTileCollisionModel extends FeatureAbstract implements MapTileCollision { @Override public CollisionFormula getCollisionFormula(String name) { return loader.getCollisionFormula(name); } MapTileCollisionModel(); @Override void prepare(FeatureProvider provider); @Override void loadCollisions(Media collisionFormulas, Media collisionGroups); @Override void loadCollisions(CollisionFormulaConfig formulasConfig, CollisionGroupConfig groupsConfig); @Override void saveCollisions(); @Override CollisionResult computeCollision(Transformable transformable, CollisionCategory category); @Override CollisionFormula getCollisionFormula(String name); @Override CollisionGroup getCollisionGroup(String name); @Override Collection<CollisionFormula> getCollisionFormulas(Tile tile); @Override Collection<CollisionFormula> getCollisionFormulas(); @Override Collection<CollisionGroup> getCollisionGroups(); @Override Media getFormulasConfig(); @Override Media getCollisionsConfig();  }### Answer:
@Test void testUnknownFormula() { assertThrows(() -> mapCollision.getCollisionFormula("void"), MapTileCollisionLoader.ERROR_FORMULA + "void"); }