Add a stub for StaticJsonDocument

extras/tests/CMakeLists.txt

@@ -12,6 +12,7 @@ link_libraries(ArduinoJson catch)
 include_directories(Helpers)
 add_subdirectory(Cpp17)
 add_subdirectory(Cpp20)
+add_subdirectory(Deprecated)
 add_subdirectory(FailingBuilds)
 add_subdirectory(IntegrationTests)
 add_subdirectory(JsonArray)

extras/tests/Deprecated/CMakeLists.txt

@@ -0,0 +1,26 @@
+# ArduinoJson - https://arduinojson.org
+# Copyright © 2014-2023, Benoit BLANCHON
+# MIT License
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "(GNU|Clang)")
+	add_compile_options(
+		-Wno-deprecated-declarations
+	)
+endif()
+
+if(MSVC)
+	add_compile_options(
+		/wd4996
+	)
+endif()
+
+add_executable(DeprecatedTests
+	StaticJsonDocument.cpp
+)
+
+add_test(Deprecated DeprecatedTests)
+
+set_tests_properties(Deprecated
+	PROPERTIES
+	LABELS "Catch"
+)

extras/tests/Deprecated/StaticJsonDocument.cpp

@@ -0,0 +1,32 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+using ArduinoJson::detail::is_base_of;
+
+TEST_CASE("StaticJsonDocument") {
+  SECTION("is a JsonDocument") {
+    REQUIRE(is_base_of<JsonDocument, StaticJsonDocument<256>>::value == true);
+  }
+
+  SECTION("deserialize / serialize") {
+    StaticJsonDocument<256> doc;
+    deserializeJson(doc, "{\"hello\":\"world\"}");
+    REQUIRE(doc.as<std::string>() == "{\"hello\":\"world\"}");
+  }
+
+  SECTION("copy") {
+    StaticJsonDocument<256> doc;
+    doc["hello"] = "world";
+    auto copy = doc;
+    REQUIRE(copy.as<std::string>() == "{\"hello\":\"world\"}");
+  }
+
+  SECTION("capacity") {
+    StaticJsonDocument<256> doc;
+    REQUIRE(doc.capacity() == 256);
+  }
+}