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libraries/ArduinoJson/extras/tests/Numbers/parseNumber.cpp

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+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2025, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.hpp>
+#include <catch.hpp>
+
+using namespace ArduinoJson;
+using namespace ArduinoJson::detail;
+
+TEST_CASE("Test unsigned integer overflow") {
+  Number first, second;
+
+  // Avoids MSVC warning C4127 (conditional expression is constant)
+  size_t integerSize = sizeof(JsonInteger);
+
+  if (integerSize == 8) {
+    first = parseNumber("18446744073709551615");
+    second = parseNumber("18446744073709551616");
+  } else {
+    first = parseNumber("4294967295");
+    second = parseNumber("4294967296");
+  }
+
+  REQUIRE(first.type() == NumberType::UnsignedInteger);
+  REQUIRE(second.type() == NumberType::Double);
+}
+
+TEST_CASE("Test signed integer overflow") {
+  Number first, second;
+
+  // Avoids MSVC warning C4127 (conditional expression is constant)
+  size_t integerSize = sizeof(JsonInteger);
+
+  if (integerSize == 8) {
+    first = parseNumber("-9223372036854775808");
+    second = parseNumber("-9223372036854775809");
+  } else {
+    first = parseNumber("-2147483648");
+    second = parseNumber("-2147483649");
+  }
+
+  REQUIRE(first.type() == NumberType::SignedInteger);
+  REQUIRE(second.type() == NumberType::Double);
+}
+
+TEST_CASE("Invalid value") {
+  auto result = parseNumber("6a3");
+
+  REQUIRE(result.type() == NumberType::Invalid);
+}
+
+TEST_CASE("float") {
+  auto result = parseNumber("3.402823e38");
+
+  REQUIRE(result.type() == NumberType::Float);
+}
+
+TEST_CASE("double") {
+  auto result = parseNumber("1.7976931348623157e308");
+
+  REQUIRE(result.type() == NumberType::Double);
+}