forked from bblanchon/ArduinoJson
105 lines
2.4 KiB
C++
105 lines
2.4 KiB
C++
// Copyright Benoit Blanchon 2014-2017
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// MIT License
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//
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// Arduino JSON library
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// https://bblanchon.github.io/ArduinoJson/
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// If you like this project, please add a star!
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#include <catch.hpp>
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#include <limits>
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#include <string>
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#include <ArduinoJson/Serialization/DynamicStringBuilder.hpp>
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#include <ArduinoJson/Serialization/JsonWriter.hpp>
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using namespace ArduinoJson::Internals;
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void check(double input, const std::string& expected) {
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std::string output;
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DynamicStringBuilder<std::string> sb(output);
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JsonWriter<DynamicStringBuilder<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("JsonWriter::writeFloat()") {
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SECTION("Pi") {
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check(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(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(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(inf, "Infinity");
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check(-inf, "-Infinity");
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}
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SECTION("Zero") {
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check(0.0, "0");
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check(-0.0, "0");
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}
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SECTION("Espilon") {
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check(2.2250738585072014E-308, "2.225073859e-308");
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check(-2.2250738585072014E-308, "-2.225073859e-308");
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}
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SECTION("Max double") {
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check(1.7976931348623157E+308, "1.797693135e308");
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check(-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(1e255, "1e255");
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check(1e-255, "1e-255");
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}
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SECTION("Exponentation when <= 1e-5") {
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check(1e-4, "0.0001");
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check(1e-5, "1e-5");
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check(-1e-4, "-0.0001");
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check(-1e-5, "-1e-5");
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}
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SECTION("Exponentation when >= 1e7") {
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check(9999999.999, "9999999.999");
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check(10000000, "1e7");
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check(-9999999.999, "-9999999.999");
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check(-10000000, "-1e7");
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}
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SECTION("Rounding when too many decimals") {
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check(0.000099999999999, "0.0001");
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check(0.0000099999999999, "1e-5");
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}
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SECTION("9 decimal places") {
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check(0.100000001, "0.100000001");
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check(0.999999999, "0.999999999");
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check(9.000000001, "9.000000001");
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check(9.999999999, "9.999999999");
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}
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SECTION("10 decimal places") {
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check(0.1000000001, "0.1");
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check(0.9999999999, "1");
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check(9.0000000001, "9");
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check(9.9999999999, "10");
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}
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}
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