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https://github.com/bblanchon/ArduinoJson.git
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120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
// ArduinoJson - https://arduinojson.org
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// Copyright © 2014-2023, Benoit BLANCHON
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// MIT License
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#include <catch.hpp>
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#include <limits>
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#include <string>
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#define ARDUINOJSON_ENABLE_NAN 1
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#define ARDUINOJSON_ENABLE_INFINITY 1
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#include <ArduinoJson/Json/TextFormatter.hpp>
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#include <ArduinoJson/Serialization/Writer.hpp>
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using namespace ArduinoJson::detail;
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template <typename TFloat>
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void check(TFloat input, const std::string& expected) {
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std::string output;
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Writer<std::string> sb(output);
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TextFormatter<Writer<std::string>> writer(sb);
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writer.writeFloat(input);
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REQUIRE(writer.bytesWritten() == output.size());
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CHECK(expected == output);
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}
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TEST_CASE("TextFormatter::writeFloat(double)") {
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SECTION("Pi") {
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check<double>(3.14159265359, "3.141592654");
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}
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SECTION("Signaling NaN") {
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double nan = std::numeric_limits<double>::signaling_NaN();
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check<double>(nan, "NaN");
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}
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SECTION("Quiet NaN") {
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double nan = std::numeric_limits<double>::quiet_NaN();
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check<double>(nan, "NaN");
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}
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SECTION("Infinity") {
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double inf = std::numeric_limits<double>::infinity();
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check<double>(inf, "Infinity");
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check<double>(-inf, "-Infinity");
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}
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SECTION("Zero") {
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check<double>(0.0, "0");
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check<double>(-0.0, "0");
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}
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SECTION("Espilon") {
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check<double>(2.2250738585072014E-308, "2.225073859e-308");
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check<double>(-2.2250738585072014E-308, "-2.225073859e-308");
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}
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SECTION("Max double") {
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check<double>(1.7976931348623157E+308, "1.797693135e308");
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check<double>(-1.7976931348623157E+308, "-1.797693135e308");
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}
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SECTION("Big exponent") {
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// this test increases coverage of normalize()
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check<double>(1e255, "1e255");
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check<double>(1e-255, "1e-255");
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}
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SECTION("Exponentation when <= 1e-5") {
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check<double>(1e-4, "0.0001");
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check<double>(1e-5, "1e-5");
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check<double>(-1e-4, "-0.0001");
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check<double>(-1e-5, "-1e-5");
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}
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SECTION("Exponentation when >= 1e7") {
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check<double>(9999999.999, "9999999.999");
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check<double>(10000000.0, "1e7");
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check<double>(-9999999.999, "-9999999.999");
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check<double>(-10000000.0, "-1e7");
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}
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SECTION("Rounding when too many decimals") {
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check<double>(0.000099999999999, "0.0001");
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check<double>(0.0000099999999999, "1e-5");
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check<double>(0.9999999996, "1");
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}
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SECTION("9 decimal places") {
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check<double>(0.100000001, "0.100000001");
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check<double>(0.999999999, "0.999999999");
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check<double>(9.000000001, "9.000000001");
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check<double>(9.999999999, "9.999999999");
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}
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SECTION("10 decimal places") {
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check<double>(0.1000000001, "0.1");
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check<double>(0.9999999999, "1");
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check<double>(9.0000000001, "9");
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check<double>(9.9999999999, "10");
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}
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}
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TEST_CASE("TextFormatter::writeFloat(float)") {
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SECTION("Pi") {
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check<float>(3.14159265359f, "3.141593");
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}
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SECTION("999.9") { // issue #543
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check<float>(999.9f, "999.9");
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}
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SECTION("24.3") { // # issue #588
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check<float>(24.3f, "24.3");
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}
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}
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