Update to ArduinoJson 7.0.4

lib/ArduinoJson/extras/tests/JsonVariant/isnull.cpp

@@ -1,12 +1,12 @@
 // ArduinoJson - https://arduinojson.org
-// Copyright © 2014-2023, Benoit BLANCHON
+// Copyright © 2014-2024, Benoit BLANCHON
 // MIT License
 
 #include <ArduinoJson.h>
 #include <catch.hpp>
 
 TEST_CASE("JsonVariant::isNull()") {
-  DynamicJsonDocument doc(4096);
+  JsonDocument doc;
   JsonVariant variant = doc.to<JsonVariant>();
 
   SECTION("returns true when Undefined") {
@@ -20,7 +20,7 @@ TEST_CASE("JsonVariant::isNull()") {
   }
 
   SECTION("returns false when EmptyArray") {
-    DynamicJsonDocument doc2(4096);
+    JsonDocument doc2;
     JsonArray array = doc2.to<JsonArray>();
 
     variant.set(array);
@@ -28,7 +28,7 @@ TEST_CASE("JsonVariant::isNull()") {
   }
 
   SECTION("returns false when EmptyObject") {
-    DynamicJsonDocument doc2(4096);
+    JsonDocument doc2;
     JsonObject obj = doc2.to<JsonObject>();
 
     variant.set(obj);
@@ -69,25 +69,4 @@ TEST_CASE("JsonVariant::isNull()") {
     variant.set(serialized(static_cast<const char*>(0)));
     REQUIRE(variant.isNull() == true);
   }
-
-  SECTION("returns true for a shallow null copy") {
-    StaticJsonDocument<128> doc2;
-    variant.shallowCopy(doc2);
-    CHECK(variant.isNull() == true);
-  }
-
-  SECTION("returns false for a shallow array copy") {
-    StaticJsonDocument<128> doc2;
-    doc2[0] = 42;
-    variant.shallowCopy(doc2);
-    CHECK(variant.isNull() == false);
-  }
-
-  SECTION("works with JsonVariantConst") {
-    variant.set(42);
-
-    JsonVariantConst cvar = variant;
-
-    REQUIRE(cvar.isNull() == false);
-  }
 }