@Test
public void testOnNewTurn()
        throws Exception {

    // Create an extractor unit on a tile with fuel.
    ExtractorModule extractorModule = ExtractorModule.createWithStandardResourceCost().resourceType( ResourceType.FUEL ).speed( 5 );
    ContainerModule unconnectedContainerModule = ContainerModule.createWithStandardResourceCost()
                                                                .resourceType( ResourceType.FUEL )
                                                                .capacity( 3 );
    createUnit( testUnitType( "Extractor", extractorModule ), 0, 0 );
    createUnit( testUnitType( "Unconnected Container", unconnectedContainerModule ), 3, 0 );
    extractorModule.getGameObject().getLocation().get().setResourceQuantity( ResourceType.FUEL, 10 );
    // There is no connected container yet, mining should fail.
    assertEquals( (int) extractorModule.getGameObject().getLocation().get().getResourceQuantity( ResourceType.FUEL ).get(), 10 );
    extractorModule.onNewTurn();
    assertEquals( (int) extractorModule.getGameObject().getLocation().get().getResourceQuantity( ResourceType.FUEL ).get(), 10 );
    // Create a connected container unit.
    ContainerModule smallConnectedContainerModule = ContainerModule.createWithStandardResourceCost()
                                                                   .resourceType( ResourceType.FUEL )
                                                                   .capacity( 3 );
    createUnit( testUnitType( "Small Connected Container", smallConnectedContainerModule ), 1, 0 );
    // Now we should be able to mine enough to fill the container.
    assertEquals( smallConnectedContainerModule.getAvailable(), 3 );
    extractorModule.onNewTurn();
    assertEquals( (int) extractorModule.getGameObject().getLocation().get().getResourceQuantity( ResourceType.FUEL ).get(), 7 );
    assertEquals( smallConnectedContainerModule.getAvailable(), 0 );
    extractorModule.onNewTurn();
    assertEquals( (int) extractorModule.getGameObject().getLocation().get().getResourceQuantity( ResourceType.FUEL ).get(), 7 );
    assertEquals( smallConnectedContainerModule.getAvailable(), 0 );
    // Create a bigger connected container unit.
    ContainerModule bigConnectedContainerModule = ContainerModule.createWithStandardResourceCost()
                                                                 .resourceType( ResourceType.FUEL )
                                                                 .capacity( 15 );
    createUnit( testUnitType( "Big Connected Container", bigConnectedContainerModule ), 0, 1 );
    // Now we should be able to mine enough to max out the extractor's speed and then empty the tile.
    assertEquals( smallConnectedContainerModule.getAvailable(), 0 );
    assertEquals( bigConnectedContainerModule.getAvailable(), 15 );
    extractorModule.onNewTurn();
    assertEquals( (int) extractorModule.getGameObject().getLocation().get().getResourceQuantity( ResourceType.FUEL ).get(), 2 );
    assertEquals( bigConnectedContainerModule.getAvailable(), 10 );
    extractorModule.onNewTurn();
    assertFalse( extractorModule.getGameObject().getLocation().get().getResourceQuantity( ResourceType.FUEL ).isPresent() );
    assertEquals( bigConnectedContainerModule.getAvailable(), 8 );
    assertEquals( bigConnectedContainerModule.getStock(), 7 );
}