krisskross

public class ProductCatalogue {
  private Multimap<Class, ? extends Item> catalogue = ArrayListMultimap.create();

  public void add(Item item) {
    catalogue.put(item.getClass(), item);
  }

  public <T extends Item> Collection<Item> list(Class<T> clazz) {
    return catalogue.get(clazz);
  }

krisskross

BiMap<String, String> languageCodes = HashBiMap.create();
languageCodes.put("en", "English");
languageCodes.put("fr", "French");
languageCodes.put("zh", "Chinese");
assert "English" == languageCodes.get("en");
assert "en&amp" == languageCodes.inverse().get("English");

krisskross

public Item(String id, String name) {
  this.id = Preconditions.checkNotNull(id, "id must not be null");
  this.name = Preconditions.checkNotNull(name, "name must not be null");
  Preconditions.checkArgument(name.length() < 6, "name must be longer than 6 chars");
}

krisskross

public class Voyage {
  private Country targetcountry;
  private int capacity;
  private List<Cargo> items = Constraints.constrainedList(new ArrayList<Cargo>(), new Constraint<Cargo>() {
    @Override
    public Cargo checkElement(Cargo cargo) {
      Preconditions.checkNotNull(cargo);
      Preconditions.checkArgument(targetcountry.allows(cargo));
      Preconditions.checkArgument(cargo.getUnits() > 0);
      return cargo;

krisskross

Predicate<Item> heavyItemPolicy = new Predicate<Item>() {
  @Override
  public boolean apply(Item item) {
    if(item.getWeight() > 1000){
      return true;
    }
    return false;
  }
};
Collection<Item> heavyItems = Collections2.filter(order, heavyItemPolicy);

krisskross

Function currencyConverter = new Function<Double, Item>() {

  @Override
  public Double apply(Item item) {
   return item.getPrice() * ANOTHER_CURRENCY;
  }
}
Collection<Double> prices = Collections2.transform(order, currencyConverter);

krisskross

InMemoryStorage storage = new InMemoryStorage();
// add a few Item.class objects to storage
Criteria middleprice = field("price").is(largerThan(100)).and(lessThan(200));
Criteria expired = field("expires").is(after(currentDate));
Collection<Item> result = storage.select(middleprice.and(not(expired))).from(Item.class);

krisskross

@RunWith(JUnitRunner.class)
public class JUnitRunnerDemoTest {
  @Test
  public void demoFixtureArguments(FixtureExample one, FixtureExample two, FixtureExample three) {
    System.out.println("demonstrateFixtureArguments(" + one + ", " + two + ", " + three + ")");
  }
}

krisskross

demonstrateFixtureArguments(0, 0, 0)
demonstrateFixtureArguments(1, 0, 0)
demonstrateFixtureArguments(0, 1, 0)
demonstrateFixtureArguments(1, 1, 0)
demonstrateFixtureArguments(0, 0, 1)
demonstrateFixtureArguments(1, 0, 1)
demonstrateFixtureArguments(0, 1, 1)
demonstrateFixtureArguments(1, 1, 1)

krisskross

public class DummyTest {
  @Rule
  public IgnoreLeadingFailure ilf = new IgnoreLeadingFailure();
  @Test
  public void testTest() {
    assertTrue(false);
  }
}