@Test
public void addAndRemoveComponent() {
Entity entity = new Entity();
entity.add(new ComponentA());
assertEquals(1, entity.getComponents().size());
Bits componentBits = entity.getComponentBits();
int componentAIndex = ComponentType.getIndexFor(ComponentA.class);
for (int i = 0; i < componentBits.length(); ++i) {
assertEquals(i == componentAIndex, componentBits.get(i));
}
assertNotNull(am.get(entity));
assertNull(bm.get(entity));
assertTrue(am.has(entity));
assertFalse(bm.has(entity));
entity.remove(ComponentA.class);
assertEquals(0, entity.getComponents().size());
for (int i = 0; i < componentBits.length(); ++i) {
assertFalse(componentBits.get(i));
}
assertNull(am.get(entity));
assertNull(bm.get(entity));
assertFalse(am.has(entity));
assertFalse(bm.has(entity));
}
/** Gets a list of all the components of the specified type. */
public <T> List<T> getComponents(Class<T> type) {
ArrayList<T> components = new ArrayList<T>();
for (Entity e : list) {
components.addAll(e.getComponents(type));
}
return components;
}
@Test
public void noComponents() {
Entity entity = new Entity();
assertEquals(0, entity.getComponents().size());
assertTrue(entity.getComponentBits().isEmpty());
assertNull(am.get(entity));
assertNull(bm.get(entity));
assertFalse(am.has(entity));
assertFalse(bm.has(entity));
}
@Test
public void addAndReturnComponent() {
Entity entity = new Entity();
ComponentA componentA = new ComponentA();
ComponentB componentB = new ComponentB();
assertEquals(componentA, entity.addAndReturn(componentA));
assertEquals(componentB, entity.addAndReturn(componentB));
assertEquals(2, entity.getComponents().size());
}
@Test
public void addSameComponent() {
Entity entity = new Entity();
ComponentA a1 = new ComponentA();
ComponentA a2 = new ComponentA();
entity.add(a1);
entity.add(a2);
assertEquals(1, entity.getComponents().size());
assertTrue(am.has(entity));
assertNotEquals(a1, am.get(entity));
assertEquals(a2, am.get(entity));
}