Added ARDUINOJSON_ENABLE_INFINITY to enable Infinity in JSON

test/MixedConfiguration/CMakeLists.txt

@@ -8,12 +8,14 @@ set(CMAKE_CXX_STANDARD 11)
 add_executable(MixedConfigurationTests
 	decode_unicode_0.cpp
 	decode_unicode_1.cpp
+	enable_nan_0.cpp
+	enable_nan_1.cpp
+	enable_infinity_0.cpp
+	enable_infinity_1.cpp
 	use_double_0.cpp
 	use_double_1.cpp
 	use_long_long_0.cpp
 	use_long_long_1.cpp
-	enable_nan_0.cpp
-	enable_nan_1.cpp
 )
 
 target_link_libraries(MixedConfigurationTests catch)

test/MixedConfiguration/enable_infinity_0.cpp

@@ -0,0 +1,35 @@
+#define ARDUINOJSON_ENABLE_INFINITY 0
+#include <ArduinoJson.h>
+
+#include <catch.hpp>
+#include <limits>
+
+static void assertParseFails(const char* json) {
+  DynamicJsonDocument doc(4096);
+  auto err = deserializeJson(doc, json);
+
+  REQUIRE(err == DeserializationError::InvalidInput);
+}
+
+static void assertJsonEquals(const JsonDocument& doc,
+                             std::string expectedJson) {
+  std::string actualJson;
+  serializeJson(doc, actualJson);
+  REQUIRE(actualJson == expectedJson);
+}
+
+TEST_CASE("ARDUINOJSON_ENABLE_INFINITY == 0") {
+  SECTION("serializeJson()") {
+    DynamicJsonDocument doc(4096);
+    doc.add(std::numeric_limits<double>::infinity());
+    doc.add(-std::numeric_limits<double>::infinity());
+
+    assertJsonEquals(doc, "[null,null]");
+  }
+
+  SECTION("deserializeJson()") {
+    assertParseFails("{\"X\":Infinity}");
+    assertParseFails("{\"X\":-Infinity}");
+    assertParseFails("{\"X\":+Infinity}");
+  }
+}

test/MixedConfiguration/enable_infinity_1.cpp

@@ -0,0 +1,38 @@
+#define ARDUINOJSON_ENABLE_INFINITY 1
+#include <ArduinoJson.h>
+
+#include <catch.hpp>
+#include <limits>
+
+namespace my {
+using ARDUINOJSON_NAMESPACE::isinf;
+}  // namespace my
+
+TEST_CASE("ARDUINOJSON_ENABLE_INFINITY == 1") {
+  DynamicJsonDocument doc(4096);
+
+  SECTION("serializeJson()") {
+    doc.add(std::numeric_limits<double>::infinity());
+    doc.add(-std::numeric_limits<double>::infinity());
+
+    std::string json;
+    serializeJson(doc, json);
+
+    REQUIRE(json == "[Infinity,-Infinity]");
+  }
+
+  SECTION("deserializeJson()") {
+    auto err = deserializeJson(doc, "[Infinity,-Infinity,+Infinity]");
+    float a = doc[0];
+    float b = doc[1];
+    float c = doc[2];
+
+    REQUIRE(err == DeserializationError::Ok);
+    REQUIRE(my::isinf(a));
+    REQUIRE(a > 0);
+    REQUIRE(my::isinf(b));
+    REQUIRE(b < 0);
+    REQUIRE(my::isinf(c));
+    REQUIRE(c > 0);
+  }
+}