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package coffee.liz.ecs
import kotlin.test.*
// Test components
data class Position(val x: Float, val y: Float) : Component
data class Velocity(val dx: Float, val dy: Float) : Component
data class Health(val value: Int) : Component
class EntityTest {
@Test
fun `entity has unique id`() {
val entity1 = Entity(1)
val entity2 = Entity(2)
assertNotEquals(entity1.id, entity2.id)
}
@Test
fun `can add component to entity`() {
val entity = Entity(0)
val position = Position(10f, 20f)
entity.add(position)
assertTrue(entity.has<Position>())
assertEquals(position, entity.get<Position>())
}
@Test
fun `can remove component from entity`() {
val entity = Entity(0)
entity.add(Position(10f, 20f))
entity.remove<Position>()
assertFalse(entity.has<Position>())
assertNull(entity.get<Position>())
}
@Test
fun `add returns entity for chaining`() {
val entity = Entity(0)
val result = entity
.add(Position(10f, 20f))
.add(Velocity(1f, 2f))
assertSame(entity, result)
assertTrue(entity.has<Position>())
assertTrue(entity.has<Velocity>())
}
@Test
fun `can replace component by adding same type`() {
val entity = Entity(0)
entity.add(Position(10f, 20f))
entity.add(Position(30f, 40f))
val position = entity.get<Position>()
assertNotNull(position)
assertEquals(30f, position.x)
assertEquals(40f, position.y)
}
@Test
fun `hasAll returns true when entity has all components`() {
val entity = Entity(0)
entity.add(Position(10f, 20f))
entity.add(Velocity(1f, 2f))
assertTrue(entity.hasAll(Position::class, Velocity::class))
}
@Test
fun `hasAll returns false when entity missing component`() {
val entity = Entity(0)
entity.add(Position(10f, 20f))
assertFalse(entity.hasAll(Position::class, Velocity::class))
}
@Test
fun `componentTypes returns all component types`() {
val entity = Entity(0)
entity.add(Position(10f, 20f))
entity.add(Velocity(1f, 2f))
entity.add(Health(100))
val types = entity.componentTypes()
assertEquals(3, types.size)
assertTrue(types.contains(Position::class))
assertTrue(types.contains(Velocity::class))
assertTrue(types.contains(Health::class))
}
@Test
fun `entities with same id are equal`() {
val entity1 = Entity(1)
val entity2 = Entity(1)
assertEquals(entity1, entity2)
assertEquals(entity1.hashCode(), entity2.hashCode())
}
@Test
fun `entities with different id are not equal`() {
val entity1 = Entity(1)
val entity2 = Entity(2)
assertNotEquals(entity1, entity2)
}
}
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