test: add group cases fast mode test

test/group/group_info.cc

@@ -68,4 +68,50 @@ TEST(Group, group_info) {
     pool.boot().join();
 }
 
-// TODO: add group_info FAST mode
+TEST(Group, group_info_fast_invalid) {
+    GroupCase::speed_up(); // switch into fast mode
+
+    SHOULD_PANIC(GroupCase::parse(GroupCase::info_t {
+        .type_id = TYPE_ID_LIMIT,
+        .group_id = 0,
+        .group_index = 0,
+    }))
+
+    SHOULD_PANIC(GroupCase::parse(GroupCase::info_t {
+        .type_id = 0,
+        .group_id = static_cast<uint16_t>(GroupType(0).group_num()),
+        .group_index = 0,
+    }))
+
+    SHOULD_PANIC(GroupCase::parse(GroupCase::info_t {
+        .type_id = 0,
+        .group_id = 0,
+        .group_index = Group(0, 0).size(),
+    }))
+}
+
+TEST(Group, group_info_fast) {
+    auto test = [](GroupType group_type) {
+        for (uint32_t group_id = 0; group_id < group_type.group_num(); ++group_id) {
+            auto cases = CommonCode::convert(Group(group_type, group_id).cases());
+            std::sort(cases.begin(), cases.end());
+
+            for (uint32_t group_index = 0; group_index < cases.size(); ++group_index) {
+                auto info = GroupCase::info_t {
+                    .type_id = static_cast<uint16_t>(group_type.unwrap()),
+                    .group_id = static_cast<uint16_t>(group_id),
+                    .group_index = group_index,
+                };
+                EXPECT_EQ(cases[group_index], GroupCase::parse(info));
+                EXPECT_EQ(info, GroupCase::encode(cases[group_index]));
+            }
+        }
+    };
+
+    auto pool = TinyPool();
+    GroupCase::speed_up(); // entry fast mode
+    for (uint32_t type_id = 0; type_id < TYPE_ID_LIMIT; ++type_id) {
+        pool.submit(test, GroupType(type_id));
+    }
+    pool.boot().join();
+}