/* __ _____ _____ _____ __| | __| | | | JSON for Modern C++ (test suite) | | |__ | | | | | | version 3.10.5 |_____|_____|_____|_|___| https://github.com/nlohmann/json Licensed under the MIT License . SPDX-License-Identifier: MIT Copyright (c) 2013-2022 Niels Lohmann . 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. */ #include "doctest_compatibility.h" #define JSON_TESTS_PRIVATE #include using nlohmann::json; namespace { // shortcut to scan a string literal json::lexer::token_type scan_string(const char* s, bool ignore_comments = false); json::lexer::token_type scan_string(const char* s, const bool ignore_comments) { auto ia = nlohmann::detail::input_adapter(s); return nlohmann::detail::lexer(std::move(ia), ignore_comments).scan(); // NOLINT(hicpp-move-const-arg,performance-move-const-arg) } } // namespace std::string get_error_message(const char* s, bool ignore_comments = false); std::string get_error_message(const char* s, const bool ignore_comments) { auto ia = nlohmann::detail::input_adapter(s); auto lexer = nlohmann::detail::lexer(std::move(ia), ignore_comments); // NOLINT(hicpp-move-const-arg,performance-move-const-arg) lexer.scan(); return lexer.get_error_message(); } TEST_CASE("lexer class") { SECTION("scan") { SECTION("structural characters") { CHECK((scan_string("[") == json::lexer::token_type::begin_array)); CHECK((scan_string("]") == json::lexer::token_type::end_array)); CHECK((scan_string("{") == json::lexer::token_type::begin_object)); CHECK((scan_string("}") == json::lexer::token_type::end_object)); CHECK((scan_string(",") == json::lexer::token_type::value_separator)); CHECK((scan_string(":") == json::lexer::token_type::name_separator)); } SECTION("literal names") { CHECK((scan_string("null") == json::lexer::token_type::literal_null)); CHECK((scan_string("true") == json::lexer::token_type::literal_true)); CHECK((scan_string("false") == json::lexer::token_type::literal_false)); } SECTION("numbers") { CHECK((scan_string("0") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("1") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("2") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("3") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("4") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("5") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("6") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("7") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("8") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("9") == json::lexer::token_type::value_unsigned)); CHECK((scan_string("-0") == json::lexer::token_type::value_integer)); CHECK((scan_string("-1") == json::lexer::token_type::value_integer)); CHECK((scan_string("1.1") == json::lexer::token_type::value_float)); CHECK((scan_string("-1.1") == json::lexer::token_type::value_float)); CHECK((scan_string("1E10") == json::lexer::token_type::value_float)); } SECTION("whitespace") { // result is end_of_input, because not token is following CHECK((scan_string(" ") == json::lexer::token_type::end_of_input)); CHECK((scan_string("\t") == json::lexer::token_type::end_of_input)); CHECK((scan_string("\n") == json::lexer::token_type::end_of_input)); CHECK((scan_string("\r") == json::lexer::token_type::end_of_input)); CHECK((scan_string(" \t\n\r\n\t ") == json::lexer::token_type::end_of_input)); } } SECTION("token_type_name") { CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::uninitialized)) == "")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::literal_true)) == "true literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::literal_false)) == "false literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::literal_null)) == "null literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::value_string)) == "string literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::value_unsigned)) == "number literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::value_integer)) == "number literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::value_float)) == "number literal")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::begin_array)) == "'['")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::begin_object)) == "'{'")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::end_array)) == "']'")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::end_object)) == "'}'")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::name_separator)) == "':'")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::value_separator)) == "','")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::parse_error)) == "")); CHECK((std::string(json::lexer::token_type_name(json::lexer::token_type::end_of_input)) == "end of input")); } SECTION("parse errors on first character") { for (int c = 1; c < 128; ++c) { // create string from the ASCII code const auto s = std::string(1, static_cast(c)); // store scan() result const auto res = scan_string(s.c_str()); CAPTURE(s) switch (c) { // single characters that are valid tokens case ('['): case (']'): case ('{'): case ('}'): case (','): case (':'): case ('0'): case ('1'): case ('2'): case ('3'): case ('4'): case ('5'): case ('6'): case ('7'): case ('8'): case ('9'): { CHECK((res != json::lexer::token_type::parse_error)); break; } // whitespace case (' '): case ('\t'): case ('\n'): case ('\r'): { CHECK((res == json::lexer::token_type::end_of_input)); break; } // anything else is not expected default: { CHECK((res == json::lexer::token_type::parse_error)); break; } } } } SECTION("very large string") { // strings larger than 1024 bytes yield a resize of the lexer's yytext buffer std::string s("\""); s += std::string(2048, 'x'); s += "\""; CHECK((scan_string(s.c_str()) == json::lexer::token_type::value_string)); } SECTION("fail on comments") { CHECK((scan_string("/", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/", false) == "invalid literal"); CHECK((scan_string("/!", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/!", false) == "invalid literal"); CHECK((scan_string("/*", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/*", false) == "invalid literal"); CHECK((scan_string("/**", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/**", false) == "invalid literal"); CHECK((scan_string("//", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("//", false) == "invalid literal"); CHECK((scan_string("/**/", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/**/", false) == "invalid literal"); CHECK((scan_string("/** /", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/** /", false) == "invalid literal"); CHECK((scan_string("/***/", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/***/", false) == "invalid literal"); CHECK((scan_string("/* true */", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/* true */", false) == "invalid literal"); CHECK((scan_string("/*/**/", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/*/**/", false) == "invalid literal"); CHECK((scan_string("/*/* */", false) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/*/* */", false) == "invalid literal"); } SECTION("ignore comments") { CHECK((scan_string("/", true) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/", true) == "invalid comment; expecting '/' or '*' after '/'"); CHECK((scan_string("/!", true) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/!", true) == "invalid comment; expecting '/' or '*' after '/'"); CHECK((scan_string("/*", true) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/*", true) == "invalid comment; missing closing '*/'"); CHECK((scan_string("/**", true) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/**", true) == "invalid comment; missing closing '*/'"); CHECK((scan_string("//", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("/**/", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("/** /", true) == json::lexer::token_type::parse_error)); CHECK(get_error_message("/** /", true) == "invalid comment; missing closing '*/'"); CHECK((scan_string("/***/", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("/* true */", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("/*/**/", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("/*/* */", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("//\n//\n", true) == json::lexer::token_type::end_of_input)); CHECK((scan_string("/**//**//**/", true) == json::lexer::token_type::end_of_input)); } }