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mb-script/lib/ArduinoJson/extras/tests/MixedConfiguration/use_double_1.cpp

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+#define ARDUINOJSON_USE_DOUBLE 1
+#include <ArduinoJson.h>
+
+#include <catch.hpp>
+
+TEST_CASE("ARDUINOJSON_USE_DOUBLE == 1") {
+  JsonDocument doc;
+  JsonObject root = doc.to<JsonObject>();
+
+  root["pi"] = 3.14;
+  root["e"] = 2.72;
+
+  std::string json;
+  serializeJson(doc, json);
+
+  REQUIRE(json == "{\"pi\":3.14,\"e\":2.72}");
+}