Implement multiplayer persistence and vanilla lighting

internal/registry/entity_test.go

@@ -0,0 +1,25 @@
+package registry
+
+import "testing"
+
+func TestEntityTypeIndex(t *testing.T) {
+	tests := map[string]int{
+		"minecraft:pig":    100,
+		"minecraft:player": 155,
+		"minecraft:zombie": 150,
+	}
+	for name, want := range tests {
+		if got := EntityTypeIndex(name); got != want {
+			t.Fatalf("EntityTypeIndex(%q) = %d, want %d", name, got, want)
+		}
+	}
+	if got := EntityTypeIndex("minecraft:not_a_real_entity"); got != -1 {
+		t.Fatalf("unknown entity type = %d, want -1", got)
+	}
+}
+
+func TestEntityTypeIsNotSyncedRegistry(t *testing.T) {
+	if got := Index("minecraft:entity_type", "minecraft:pig"); got != -1 {
+		t.Fatalf("synced registry unexpectedly has entity_type pig = %d", got)
+	}
+}