use local library source instead to correct some black-box issue for aliyuniot

lib/ArduinoJson/extras/tests/MemoryPool/clear.cpp

@@ -0,0 +1,31 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2020
+// MIT License
+
+#include <ArduinoJson/Memory/MemoryPool.hpp>
+#include <catch.hpp>
+
+using namespace ARDUINOJSON_NAMESPACE;
+
+static const size_t poolCapacity = 512;
+
+TEST_CASE("MemoryPool::clear()") {
+  char buffer[poolCapacity];
+  MemoryPool pool(buffer, sizeof(buffer));
+
+  SECTION("Discards allocated variants") {
+    pool.allocVariant();
+
+    pool.clear();
+    REQUIRE(pool.size() == 0);
+  }
+
+  SECTION("Discards allocated strings") {
+    pool.allocFrozenString(10);
+    REQUIRE(pool.size() > 0);
+
+    pool.clear();
+
+    REQUIRE(pool.size() == 0);
+  }
+}