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+/*************************************************************************/
+/* test_expression.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2021 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_EXPRESSION_H
+#define TEST_EXPRESSION_H
+
+#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(
+ Math::is_equal_approx(double(expression.execute()), -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(
+ Math::is_equal_approx(double(expression.execute()), 5),
+ "Float addition should return the expected result.");
+
+ CHECK_MESSAGE(
+ expression.parse("3.0 / 10") == OK,
+ "Float / integer division should parse successfully.");
+ CHECK_MESSAGE(
+ Math::is_equal_approx(double(expression.execute()), 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(
+ Math::is_equal_approx(double(expression.execute()), 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(
+ Math::is_equal_approx(double(expression.execute()), 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(
+ Math::is_equal_approx(double(expression.execute()), 20.18905),
+ "Float multiplication-addition-subtraction-division 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(
+ Math::is_equal_approx(double(expression.execute()), 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(
+ Math::is_equal_approx(double(expression.execute()), 25),
+ "The expression should return the expected result.");
+
+ CHECK_MESSAGE(
+ expression.parse("2e.5") == OK,
+ "The expression should parse successfully.");
+ CHECK_MESSAGE(
+ Math::is_equal_approx(double(expression.execute()), 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.");
+}
+
+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(
+ Math::is_equal_approx(double(expression.execute()), 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;
+ parameter_names.push_back("foo");
+ parameter_names.push_back("bar");
+ CHECK_MESSAGE(
+ expression.parse("foo + bar + 50", parameter_names) == OK,
+ "The expression should parse successfully.");
+ Array values;
+ values.push_back(60);
+ values.push_back(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;
+ values_invalid.push_back(60);
+ values_invalid.push_back(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;
+ parameter_names_mismatch.push_back("foo");
+ parameter_names_mismatch.push_back("bar");
+ CHECK_MESSAGE(
+ expression.parse("foo + bar + 50", parameter_names_mismatch) == OK,
+ "The expression should parse successfully.");
+ Array values_mismatch;
+ values_mismatch.push_back(60);
+ values_mismatch.push_back(20);
+ values_mismatch.push_back(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;
+ parameter_names_mismatch2.push_back("foo");
+ parameter_names_mismatch2.push_back("bar");
+ parameter_names_mismatch2.push_back("baz");
+ CHECK_MESSAGE(
+ expression.parse("foo + bar + baz + 50", parameter_names_mismatch2) == OK,
+ "The expression should parse successfully.");
+ Array values_mismatch2;
+ values_mismatch2.push_back(60);
+ values_mismatch2.push_back(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
+
+#endif // TEST_EXPRESSION_H
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