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Add test suite for `Variant` 

Added a test case for `VariantWriter` and `VariantParser` overflows.
This commit is contained in:
Andrii Doroshenko (Xrayez) 2020-07-24 22:06:24 +03:00
parent 2efba27089
commit 3f77056dc6
2 changed files with 112 additions and 0 deletions
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1
tests/test_main.cpp
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@ -48,6 +48,7 @@
#include "test_shader_lang.h"
#include "test_string.h"
#include "test_validate_testing.h"
#include "test_variant.h"
#include "modules/modules_tests.gen.h"

111
tests/test_variant.h Normal file
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/*************************************************************************/
/* test_variant.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#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