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// Copyright (c) 2019 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "math-server" project.
// For details, see https://github.com/egor-tensin/math-server.
// Distributed under the MIT License.
#include <parser/error.hpp>
#include <parser/parser.hpp>
#include <boost/test/data/monomorphic.hpp>
#include <boost/test/data/test_case.hpp>
#include <boost/test/unit_test.hpp>
#include <string>
#include <string_view>
#include <vector>
namespace bdata = boost::unit_test::data;
using math::server::Parser;
using math::server::ParserError;
namespace {
namespace exec::valid {
const std::vector<std::string_view> input{
// Constants and unary operators:
"1",
"-1",
"--1",
"+--+-2",
// Basic exponentiation:
"0^0",
"4^.5",
" 4 ^ ---0.5 ",
// Exponentiation is right-associative:
"2 ^ 3 ^ 3",
"(2 ^ 3) ^ 3",
// Exponentiation has higher precedence than the unary minus:
"(-2) ^ 2",
"-2 ^ 2",
"(.5 ^ -1) ^ 4",
".5 ^ -1 ^ 4",
// Basic binary operators:
" 1 + 2 ",
" 2 * 1 + 3 ",
" 2 * (1 + 3) ",
" 2 * (1 + 3 * (1 - -3)) ",
" -2 * (1 + --3 * (1 - -3)) ",
// Looks weird, but also works in e.g. Python:
" -2 * -+--- (3 + -100e-1) ",
" -2^2 --+- -3^0 / (4 + +12) ^.5^2 ",
" -2^2 --+- -3^0 / ((4 + +12) ^.5)^2 ",
};
const std::vector<double> expected{
// Constants and unary operators:
1,
-1,
1,
-2,
// Basic exponentiation:
1,
2,
0.5,
// Exponentiation is right-associative:
134217728,
512,
// Exponentiation has higher precedence than the unary minus:
4,
-4,
16,
2,
// Basic binary operators:
3,
5,
8,
26,
-26,
// Looks weird, but also works in e.g. Python:
14,
-3.5,
-3.9375,
};
} // namespace exec::valid
namespace exec::invalid {
const std::vector<std::string_view> input{
"",
"-",
"-+-",
// Missing operand:
" 1 + ",
"-2 + 3 ^ -",
// Unmatched parentheses:
" 2 * (1 + 3 ",
" 2 * (1 + 3) )",
};
const std::vector<std::string> error_msg{
"server error: parser error: expected '-', '+', '(' or a number",
"server error: parser error: expected '-', '+', '(' or a number",
"server error: parser error: expected '-', '+', '(' or a number",
// Missing operand:
"server error: parser error: expected '-', '+', '(' or a number",
"server error: parser error: expected '-', '+', '(' or a number",
// Unmatched parentheses:
"server error: parser error: missing closing ')'",
"server error: parser error: expected a binary operator",
};
} // namespace exec::invalid
} // namespace
BOOST_AUTO_TEST_SUITE(parser_tests)
BOOST_DATA_TEST_CASE(test_exec_valid,
bdata::make(exec::valid::input) ^ exec::valid::expected,
input,
expected) {
Parser parser{input};
BOOST_TEST(parser.exec() == expected);
}
BOOST_DATA_TEST_CASE(test_exec_invalid,
bdata::make(exec::invalid::input) ^ exec::invalid::error_msg,
input,
error_msg) {
BOOST_REQUIRE_THROW(
do {
Parser parser{input};
parser.exec();
} while (0),
ParserError);
try {
Parser parser{input};
parser.exec();
} catch (const ParserError& e) {
BOOST_TEST(error_msg == e.what());
}
}
BOOST_AUTO_TEST_SUITE_END()
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