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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 <server/parser/error.hpp>
#include <server/parser/parser.hpp>
#include <boost/test/data/test_case.hpp>
#include <boost/test/data/monomorphic.hpp>
#include <boost/test/unit_test.hpp>
#include <string>
#include <string_view>
#include <vector>
BOOST_AUTO_TEST_SUITE(parser_tests)
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 binary operators:
" 1 + 2 ",
" 2 * 1 + 3 ",
" 2 * (1 + 3) ",
" 2 * (1 + 3 * (1 - -3)) ",
// Looks weird, but also works in e.g. Python:
" -2 * -+--- (3 + -100e-1) ",
// Power operator is right-associative:
"2 ^ 3 ^ 3",
"(2 ^ 3) ^ 3",
// Power operator has higher precedence than the unary minus:
"(.5 ^ -1) ^ 4",
".5 ^ -1 ^ 4",
};
const std::vector<double> expected{
1,
-1,
1,
-2,
3,
5,
8,
26,
14,
134217728,
512,
16,
2,
};
}
namespace exec::invalid {
const std::vector<std::string_view> input{
"",
// Missing operand:
" 1 + ",
// 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: missing closing ')'",
"server error: parser error: expected a binary operator",
};
}
}
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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