godot/tests/test_variant.h
Andrii Doroshenko (Xrayez) 3f77056dc6 Add test suite for Variant
Added a test case for `VariantWriter` and `VariantParser` overflows.
2020-07-28 18:34:55 +03:00

112 lines
4.6 KiB
C++

/*************************************************************************/
/* test_variant.h */
/*************************************************************************/
/* This file is part of: */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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#ifndef TEST_VARIANT_H
#define TEST_VARIANT_H
#include "core/variant.h"
#include "core/variant_parser.h"
#include "thirdparty/doctest/doctest.h"
namespace TestVariant {
TEST_CASE("[Variant] Writer and parser integer") {
int64_t a32 = 2147483648; // 2^31, so out of bounds for 32-bit signed int [-2^31,-2^31-1].
String a32_str;
VariantWriter::write_to_string(a32, a32_str);
CHECK_MESSAGE(a32_str != "-2147483648", "Should not wrap around");
int64_t b64 = 9223372036854775807; // 2^63-1, upper bound for signed 64-bit int.
String b64_str;
VariantWriter::write_to_string(b64, b64_str);
CHECK_MESSAGE(b64_str == "9223372036854775807", "Should not wrap around.");
VariantParser::StreamString ss;
String errs;
int line;
Variant b64_parsed;
int64_t b64_int_parsed;
ss.s = b64_str;
VariantParser::parse(&ss, b64_parsed, errs, line);
b64_int_parsed = b64_parsed;
CHECK_MESSAGE(b64_int_parsed == 9223372036854775807, "Should parse back.");
ss.s = "9223372036854775808"; // Overflowed by one.
VariantParser::parse(&ss, b64_parsed, errs, line);
b64_int_parsed = b64_parsed;
CHECK_MESSAGE(b64_int_parsed == 9223372036854775807, "The result should be clamped to max value.");
ss.s = "1e100"; // Googol! Scientific notation.
VariantParser::parse(&ss, b64_parsed, errs, line);
b64_int_parsed = b64_parsed;
CHECK_MESSAGE(b64_int_parsed == 9223372036854775807, "The result should be clamped to max value.");
}
TEST_CASE("[Variant] Writer and parser float") {
// Assuming real_t is double.
real_t a64 = 340282346638528859811704183484516925440.0; // std::numeric_limits<real_t>::max()
String a64_str;
VariantWriter::write_to_string(a64, a64_str);
CHECK_MESSAGE(a64_str == "3.40282e+38", "Writes in scientific notation.");
CHECK_MESSAGE(a64_str != "inf", "Should not overflow.");
CHECK_MESSAGE(a64_str != "nan", "The result should be defined.");
VariantParser::StreamString ss;
String errs;
int line;
Variant b64_parsed;
real_t b64_float_parsed;
ss.s = a64_str;
VariantParser::parse(&ss, b64_parsed, errs, line);
b64_float_parsed = b64_parsed;
CHECK_MESSAGE(b64_float_parsed == 340282001837565597733306976381245063168.0, "Should parse back.");
// Loses precision, but that's alright.
ss.s = "1.0e+100"; // Float version of Googol!
VariantParser::parse(&ss, b64_parsed, errs, line);
b64_float_parsed = b64_parsed;
CHECK_MESSAGE(b64_float_parsed == 340282001837565597733306976381245063168.0, "Should not overflow.");
}
} // namespace TestVariant
#endif // TEST_VARIANT_H