Added a test for issue #808

src/ArduinoJson/Data/JsonVariantData.hpp

@@ -30,13 +30,6 @@ struct JsonVariantData {
     content.asFloat = value;
   }
 
-  void setInteger(JsonInteger value) {
-    if (value > 0)
-      setPostiveInteger(static_cast<JsonUInt>(value));
-    else
-      setNegativeInteger(static_cast<JsonUInt>(-value));
-  }
-
   void setNegativeInteger(JsonUInt value) {
     type = JSON_NEGATIVE_INTEGER;
     content.asInteger = value;

test/JsonDeserializer/deserializeJsonValue.cpp

@@ -87,6 +87,14 @@ TEST_CASE("deserializeJson(DynamicJsonDocument&)") {
     REQUIRE(doc.as<bool>() == false);
   }
 
+  SECTION("0") {
+    DeserializationError err = deserializeJson(doc, "0");
+    REQUIRE(err == DeserializationError::Ok);
+    REQUIRE(doc.is<int>() == true);
+    REQUIRE(doc.as<int>() == 0);
+    REQUIRE(doc.as<std::string>() == "0");  // issue #808
+  }
+
   SECTION("NaN") {
     DeserializationError err = deserializeJson(doc, "NaN");
     REQUIRE(err == DeserializationError::Ok);

test/JsonSerializer/JsonVariant.cpp

@@ -45,6 +45,10 @@ TEST_CASE("serializeJson(JsonVariant)") {
     check(3.1415927, "3.1415927");
   }
 
+  SECTION("Zero") {
+    check(0, "0");
+  }
+
   SECTION("Integer") {
     check(42, "42");
   }