Removed the automatic expansion of DynamicJsonDocument

test/MemoryPool/allocVariant.cpp

@@ -0,0 +1,60 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson/Memory/MemoryPool.hpp>
+#include <catch.hpp>
+
+using namespace ARDUINOJSON_NAMESPACE;
+
+static char buffer[4096];
+
+TEST_CASE("MemoryPool::allocVariant()") {
+  SECTION("Returns different pointer") {
+    MemoryPool pool(buffer, sizeof(buffer));
+
+    VariantSlot* s1 = pool.allocVariant();
+    REQUIRE(s1 != 0);
+    VariantSlot* s2 = pool.allocVariant();
+    REQUIRE(s2 != 0);
+
+    REQUIRE(s1 != s2);
+  }
+
+  SECTION("Returns same pointer after freeSlot()") {
+    MemoryPool pool(buffer, sizeof(buffer));
+
+    VariantSlot* s1 = pool.allocVariant();
+    pool.freeVariant(s1);
+    VariantSlot* s2 = pool.allocVariant();
+
+    REQUIRE(s1 == s2);
+  }
+
+  SECTION("Returns aligned pointers") {
+    MemoryPool pool(buffer, sizeof(buffer));
+
+    REQUIRE(isAligned(pool.allocVariant()));
+    REQUIRE(isAligned(pool.allocVariant()));
+  }
+
+  SECTION("Returns zero if capacity is 0") {
+    MemoryPool pool(buffer, 0);
+
+    REQUIRE(pool.allocVariant() == 0);
+  }
+
+  SECTION("Returns zero if buffer is null") {
+    MemoryPool pool(0, sizeof(buffer));
+
+    REQUIRE(pool.allocVariant() == 0);
+  }
+
+  SECTION("Returns zero if capacity is insufficient") {
+    MemoryPool pool(buffer, sizeof(VariantSlot));
+
+    pool.allocVariant();
+
+    REQUIRE(pool.allocVariant() == 0);
+  }
+}