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noahbackus
2025-09-16 20:46:46 -04:00
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tests/core/math/test_expression.h Normal file
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/**************************************************************************/
/* test_expression.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
#pragma once
#include "core/math/expression.h"
#include "tests/test_macros.h"
namespace TestExpression {
TEST_CASE("[Expression] Integer arithmetic") {
Expression expression;
CHECK_MESSAGE(
expression.parse("-123456") == OK,
"Integer identity should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == -123456,
"Integer identity should return the expected result.");
CHECK_MESSAGE(
expression.parse("2 + 3") == OK,
"Integer addition should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 5,
"Integer addition should return the expected result.");
CHECK_MESSAGE(
expression.parse("999999999999 + 999999999999") == OK,
"Large integer addition should parse successfully.");
CHECK_MESSAGE(
int64_t(expression.execute()) == 1'999'999'999'998,
"Large integer addition should return the expected result.");
CHECK_MESSAGE(
expression.parse("25 / 10") == OK,
"Integer / integer division should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 2,
"Integer / integer division should return the expected result.");
CHECK_MESSAGE(
expression.parse("2 * (6 + 14) / 2 - 5") == OK,
"Integer multiplication-addition-subtraction-division should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 15,
"Integer multiplication-addition-subtraction-division should return the expected result.");
}
TEST_CASE("[Expression] Floating-point arithmetic") {
Expression expression;
CHECK_MESSAGE(
expression.parse("-123.456") == OK,
"Float identity should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(-123.456),
"Float identity should return the expected result.");
CHECK_MESSAGE(
expression.parse("2.0 + 3.0") == OK,
"Float addition should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(5),
"Float addition should return the expected result.");
CHECK_MESSAGE(
expression.parse("3.0 / 10") == OK,
"Float / integer division should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(0.3),
"Float / integer division should return the expected result.");
CHECK_MESSAGE(
expression.parse("3 / 10.0") == OK,
"Basic integer / float division should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(0.3),
"Basic integer / float division should return the expected result.");
CHECK_MESSAGE(
expression.parse("3.0 / 10.0") == OK,
"Float / float division should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(0.3),
"Float / float division should return the expected result.");
CHECK_MESSAGE(
expression.parse("2.5 * (6.0 + 14.25) / 2.0 - 5.12345") == OK,
"Float multiplication-addition-subtraction-division should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(20.18905),
"Float multiplication-addition-subtraction-division should return the expected result.");
}
TEST_CASE("[Expression] Floating-point notation") {
Expression expression;
CHECK_MESSAGE(
expression.parse("2.") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(2.0),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse("(2.)") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(2.0),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse(".3") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(0.3),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse("2.+5.") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(7.0),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse(".3-.8") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(-0.5),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse("2.+.2") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(2.2),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse(".0*0.") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(0.0),
"The expression should return the expected result.");
}
TEST_CASE("[Expression] Scientific notation") {
Expression expression;
CHECK_MESSAGE(
expression.parse("2.e5") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
expression.parse("2.E5") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(200'000),
"The expression should return the expected result.");
// The middle "e" is ignored here.
CHECK_MESSAGE(
expression.parse("2e5") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(2e5),
"The expression should return the expected result.");
CHECK_MESSAGE(
expression.parse("2e.5") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(2),
"The expression should return the expected result.");
}
TEST_CASE("[Expression] Underscored numeric literals") {
Expression expression;
CHECK_MESSAGE(
expression.parse("1_000_000") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
expression.parse("1_000.000") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
expression.parse("0xff_99_00") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
expression.parse("0Xff_99_00") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
expression.parse("0b10_11_00") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
expression.parse("0B10_11_00") == OK,
"The expression should parse successfully.");
}
TEST_CASE("[Expression] Built-in functions") {
Expression expression;
CHECK_MESSAGE(
expression.parse("sqrt(pow(3, 2) + pow(4, 2))") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 5,
"`sqrt(pow(3, 2) + pow(4, 2))` should return the expected result.");
CHECK_MESSAGE(
expression.parse("snapped(sin(0.5), 0.01)") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
double(expression.execute()) == doctest::Approx(0.48),
"`snapped(sin(0.5), 0.01)` should return the expected result.");
CHECK_MESSAGE(
expression.parse("pow(2.0, -2500)") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
Math::is_zero_approx(double(expression.execute())),
"`pow(2.0, -2500)` should return the expected result (asymptotically zero).");
}
TEST_CASE("[Expression] Boolean expressions") {
Expression expression;
CHECK_MESSAGE(
expression.parse("24 >= 12") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
bool(expression.execute()),
"The boolean expression should evaluate to `true`.");
CHECK_MESSAGE(
expression.parse("1.0 < 1.25 && 1.25 < 2.0") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
bool(expression.execute()),
"The boolean expression should evaluate to `true`.");
CHECK_MESSAGE(
expression.parse("!2") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
!bool(expression.execute()),
"The boolean expression should evaluate to `false`.");
CHECK_MESSAGE(
expression.parse("!!2") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
bool(expression.execute()),
"The boolean expression should evaluate to `true`.");
CHECK_MESSAGE(
expression.parse("!0") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
bool(expression.execute()),
"The boolean expression should evaluate to `true`.");
CHECK_MESSAGE(
expression.parse("!!0") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
!bool(expression.execute()),
"The boolean expression should evaluate to `false`.");
CHECK_MESSAGE(
expression.parse("2 && 5") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
bool(expression.execute()),
"The boolean expression should evaluate to `true`.");
CHECK_MESSAGE(
expression.parse("0 || 0") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
!bool(expression.execute()),
"The boolean expression should evaluate to `false`.");
CHECK_MESSAGE(
expression.parse("(2 <= 4) && (2 > 5)") == OK,
"The boolean expression should parse successfully.");
CHECK_MESSAGE(
!bool(expression.execute()),
"The boolean expression should evaluate to `false`.");
}
TEST_CASE("[Expression] Expressions with variables") {
Expression expression;
PackedStringArray parameter_names = { "foo", "bar" };
CHECK_MESSAGE(
expression.parse("foo + bar + 50", parameter_names) == OK,
"The expression should parse successfully.");
Array values = { 60, 20 };
CHECK_MESSAGE(
int(expression.execute(values)) == 130,
"The expression should return the expected value.");
PackedStringArray parameter_names_invalid;
parameter_names_invalid.push_back("foo");
parameter_names_invalid.push_back("baz"); // Invalid parameter name.
CHECK_MESSAGE(
expression.parse("foo + bar + 50", parameter_names_invalid) == OK,
"The expression should parse successfully.");
Array values_invalid = { 60, 20 };
// Invalid parameters will parse successfully but print an error message when executing.
ERR_PRINT_OFF;
CHECK_MESSAGE(
int(expression.execute(values_invalid)) == 0,
"The expression should return the expected value.");
ERR_PRINT_ON;
// Mismatched argument count (more values than parameters).
PackedStringArray parameter_names_mismatch = { "foo", "bar" };
CHECK_MESSAGE(
expression.parse("foo + bar + 50", parameter_names_mismatch) == OK,
"The expression should parse successfully.");
Array values_mismatch = { 60, 20, 110 };
CHECK_MESSAGE(
int(expression.execute(values_mismatch)) == 130,
"The expression should return the expected value.");
// Mismatched argument count (more parameters than values).
PackedStringArray parameter_names_mismatch2 = { "foo", "bar", "baz" };
CHECK_MESSAGE(
expression.parse("foo + bar + baz + 50", parameter_names_mismatch2) == OK,
"The expression should parse successfully.");
Array values_mismatch2 = { 60, 20 };
// Having more parameters than values will parse successfully but print an
// error message when executing.
ERR_PRINT_OFF;
CHECK_MESSAGE(
int(expression.execute(values_mismatch2)) == 0,
"The expression should return the expected value.");
ERR_PRINT_ON;
}
TEST_CASE("[Expression] Invalid expressions") {
Expression expression;
CHECK_MESSAGE(
expression.parse("\\") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("0++") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("()") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("()()") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("() - ()") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("() * 12345") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("() * 12345") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("123'456") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
CHECK_MESSAGE(
expression.parse("123\"456") == ERR_INVALID_PARAMETER,
"The expression shouldn't parse successfully.");
}
TEST_CASE("[Expression] Unusual expressions") {
Expression expression;
// Redundant parentheses don't cause a parse error as long as they're matched.
CHECK_MESSAGE(
expression.parse("(((((((((((((((666)))))))))))))))") == OK,
"The expression should parse successfully.");
// Using invalid identifiers doesn't cause a parse error.
ERR_PRINT_OFF;
CHECK_MESSAGE(
expression.parse("hello + hello") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 0,
"The expression should return the expected result.");
ERR_PRINT_ON;
ERR_PRINT_OFF;
CHECK_MESSAGE(
expression.parse("$1.00 + ???5") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 0,
"The expression should return the expected result.");
ERR_PRINT_ON;
// Commas can't be used as a decimal parameter.
CHECK_MESSAGE(
expression.parse("123,456") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 123,
"The expression should return the expected result.");
// Spaces can't be used as a separator for large numbers.
CHECK_MESSAGE(
expression.parse("123 456") == OK,
"The expression should parse successfully.");
CHECK_MESSAGE(
int(expression.execute()) == 123,
"The expression should return the expected result.");
// Division by zero is accepted, even though it prints an error message normally.
CHECK_MESSAGE(
expression.parse("-25.4 / 0") == OK,
"The expression should parse successfully.");
ERR_PRINT_OFF;
CHECK_MESSAGE(
Math::is_inf(double(expression.execute())),
"`-25.4 / 0` should return inf.");
ERR_PRINT_ON;
CHECK_MESSAGE(
expression.parse("0 / 0") == OK,
"The expression should parse successfully.");
ERR_PRINT_OFF;
CHECK_MESSAGE(
int(expression.execute()) == 0,
"`0 / 0` should return 0.");
ERR_PRINT_ON;
// The tests below currently crash the engine.
//
//CHECK_MESSAGE(
// expression.parse("(-9223372036854775807 - 1) % -1") == OK,
// "The expression should parse successfully.");
//CHECK_MESSAGE(
// int64_t(expression.execute()) == 0,
// "`(-9223372036854775807 - 1) % -1` should return the expected result.");
//
//CHECK_MESSAGE(
// expression.parse("(-9223372036854775807 - 1) / -1") == OK,
// "The expression should parse successfully.");
//CHECK_MESSAGE(
// int64_t(expression.execute()) == 0,
// "`(-9223372036854775807 - 1) / -1` should return the expected result.");
}
} // namespace TestExpression