Added PetDataset

src/test/java/es/uvigo/esei/daa/dataset/PetsDataset.java

+package es.uvigo.esei.daa.dataset;
+
+import static java.util.Arrays.binarySearch;
+import static java.util.Arrays.stream;
+
+import java.util.Arrays;
+import java.util.function.Predicate;
+
+import es.uvigo.esei.daa.entities.Pet;
+
+public final class PetsDataset {
+	private PetsDataset() {}
+	
+	public static Pet[] pets() {
+		return new Pet[] {
+			new Pet(1, "Ron", "Can", "Moito", 1),
+			new Pet(2, "Paul", "Gato", "Alerxico", 2),
+			new Pet(3, "Punky", "Gato", "Alerxico", 2)
+		};
+	}
+	
+	public static Pet[] peopleWithout(int ... ids) {
+		Arrays.sort(ids);
+		
+		final Predicate<Pet> hasValidId = pet ->
+			binarySearch(ids, pet.getId()) < 0;
+		
+		return stream(pets())
+			.filter(hasValidId)
+		.toArray(Pet[]::new);
+	}
+	
+	public static Pet pet(int id) {
+		return stream(pets())
+			.filter(pet -> pet.getId() == id)
+			.findAny()
+		.orElseThrow(IllegalArgumentException::new);
+	}
+	
+	public static int existentId() {
+		return 1;
+	}
+	
+	public static int nonExistentId() {
+		return 1234;
+	}
+
+	public static Pet existentPet() {
+		return pet(existentId());
+	}
+	
+	public static Pet nonExistentPet() {
+		return new Pet(nonExistentId(), "Cospe", "Gaivota", "Pepera",1);
+	}
+	
+	public static String newName() {
+		return "Tor";
+	}
+	
+	public static String newKind() {
+		return "Pe";
+	}
+	
+	public static String newBreed() {
+		return "QueFlipas";
+	}
+	
+	public static int newOwner() {
+		return 2;
+	}
+	
+	public static Pet newPet() {
+		return new Pet(pets().length + 1, newName(), newKind(), newBreed(), newOwner());
+	}
+}