test: add group parallel

src/core_test/cases/ranges.cc

@@ -20,6 +20,7 @@ using klotski::cases::BASIC_RANGES_NUM_;
 
 constexpr auto Heads = RangesUnion::Heads;
 
+static_assert(std::is_default_constructible_v<Ranges>); // TODO: more concept assert
 static_assert(std::is_base_of_v<std::vector<uint32_t>, Ranges>);
 
 TEST(Ranges, check) {

src/core_test/helper/internal/parallel.cc

@@ -32,7 +32,15 @@ void helper::block_num_parallel(std::function<void(int n, int n_2x1, int n_1x1)>
 }
 
 void helper::group_parallel(std::function<void(Group)> &&func) {
-    // TODO: spawn all Groups
+    BS::thread_pool pool;
+    for (uint32_t type_id = 0; type_id < TYPE_ID_LIMIT; ++type_id) {
+        for (auto group : GroupUnion::unsafe_create(type_id).groups()) {
+            pool.detach_task([group, &func] {
+                func(group);
+            });
+        }
+    }
+    pool.wait();
 }
 
 void helper::type_id_parallel(std::function<void(uint32_t type_id)> &&func) {