mirror of
https://github.com/bblanchon/ArduinoJson.git
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102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
// ArduinoJson - https://arduinojson.org
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// Copyright © 2014-2022, Benoit BLANCHON
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// MIT License
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#define ARDUINOJSON_USE_DOUBLE 0
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#define ARDUINOJSON_ENABLE_NAN 1
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#define ARDUINOJSON_ENABLE_INFINITY 1
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#include <ArduinoJson.hpp>
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#include <catch.hpp>
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using namespace ARDUINOJSON_NAMESPACE;
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void checkFloat(const char* input, float expected) {
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CAPTURE(input);
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REQUIRE(parseNumber<float>(input) == Approx(expected));
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}
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void checkFloatNaN(const char* input) {
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CAPTURE(input);
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float result = parseNumber<float>(input);
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REQUIRE(result != result);
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}
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void checkFloatInf(const char* input, bool negative) {
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CAPTURE(input);
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float x = parseNumber<float>(input);
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if (negative)
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REQUIRE(x < 0);
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else
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REQUIRE(x > 0);
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REQUIRE(x == x); // not a NaN
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REQUIRE(x * 2 == x); // a property of infinity
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}
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TEST_CASE("parseNumber<float>()") {
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SECTION("Float_Short_NoExponent") {
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checkFloat("3.14", 3.14f);
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checkFloat("-3.14", -3.14f);
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checkFloat("+3.14", +3.14f);
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}
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SECTION("Short_NoDot") {
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checkFloat("1E+38", 1E+38f);
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checkFloat("-1E+38", -1E+38f);
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checkFloat("+1E-38", +1E-38f);
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checkFloat("+1e+38", +1e+38f);
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checkFloat("-1e-38", -1e-38f);
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}
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SECTION("Max") {
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checkFloat("340.2823e+36", 3.402823e+38f);
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checkFloat("34.02823e+37", 3.402823e+38f);
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checkFloat("3.402823e+38", 3.402823e+38f);
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checkFloat("0.3402823e+39", 3.402823e+38f);
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checkFloat("0.03402823e+40", 3.402823e+38f);
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checkFloat("0.003402823e+41", 3.402823e+38f);
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}
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SECTION("VeryLong") {
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checkFloat("0.00000000000000000000000000000001", 1e-32f);
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checkFloat("100000000000000000000000000000000.0", 1e+32f);
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checkFloat(
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"100000000000000000000000000000000.00000000000000000000000000000",
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1e+32f);
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}
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SECTION("MantissaTooLongToFit") {
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checkFloat("0.340282346638528861111111111111", 0.34028234663852886f);
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checkFloat("34028234663852886.11111111111111", 34028234663852886.0f);
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checkFloat("34028234.66385288611111111111111", 34028234.663852886f);
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checkFloat("-0.340282346638528861111111111111", -0.34028234663852886f);
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checkFloat("-34028234663852886.11111111111111", -34028234663852886.0f);
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checkFloat("-34028234.66385288611111111111111", -34028234.663852886f);
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}
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SECTION("ExponentTooBig") {
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checkFloatInf("1e39", false);
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checkFloatInf("-1e39", true);
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checkFloatInf("1e255", false);
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checkFloat("1e-255", 0.0f);
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}
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SECTION("NaN") {
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checkFloatNaN("NaN");
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checkFloatNaN("nan");
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}
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SECTION("Infinity") {
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checkFloatInf("Infinity", false);
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checkFloatInf("+Infinity", false);
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checkFloatInf("-Infinity", true);
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checkFloatInf("inf", false);
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checkFloatInf("+inf", false);
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checkFloatInf("-inf", true);
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checkFloatInf("1e300", false);
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checkFloatInf("-1e300", true);
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}
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}
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