Moved ancillary files to extras/ (fixes #1011)

extras/tests/JsonObject/size.cpp

@@ -0,0 +1,39 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2019
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+#include <string>
+
+TEST_CASE("JsonObject::size()") {
+  DynamicJsonDocument doc(4096);
+  JsonObject obj = doc.to<JsonObject>();
+
+  SECTION("initial size is zero") {
+    REQUIRE(0 == obj.size());
+  }
+
+  SECTION("increases when values are added") {
+    obj["hello"] = 42;
+    REQUIRE(1 == obj.size());
+  }
+
+  SECTION("decreases when values are removed") {
+    obj["hello"] = 42;
+    obj.remove("hello");
+    REQUIRE(0 == obj.size());
+  }
+
+  SECTION("doesn't increase when the same key is added twice") {
+    obj["hello"] = 1;
+    obj["hello"] = 2;
+    REQUIRE(1 == obj.size());
+  }
+
+  SECTION("doesn't decrease when another key is removed") {
+    obj["hello"] = 1;
+    obj.remove("world");
+    REQUIRE(1 == obj.size());
+  }
+}