JsonArray::remove() and JsonObject::remove() now release the memory of the variant

test/DynamicMemoryPool/allocSlot.cpp

@@ -0,0 +1,27 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson/Memory/DynamicMemoryPool.hpp>
+#include <catch.hpp>
+
+using namespace ARDUINOJSON_NAMESPACE;
+
+TEST_CASE("DynamicMemoryPool::allocSlot()") {
+  DynamicMemoryPool memoryPool;
+
+  SECTION("Returns different pointer") {
+    Slot* s1 = memoryPool.allocSlot();
+    Slot* s2 = memoryPool.allocSlot();
+
+    REQUIRE(s1 != s2);
+  }
+
+  SECTION("Returns same pointer after freeSlot()") {
+    Slot* s1 = memoryPool.allocSlot();
+    memoryPool.freeSlot(s1);
+    Slot* s2 = memoryPool.allocSlot();
+
+    REQUIRE(s1 == s2);
+  }
+}