Boost.Spirit 的单元测试
我是 Boost.Spirit 和 Boost.Test 的新手，我想知道您如何验证语法的正确性。 下面是我目前的做法的简化版本，我非常确定有更好的方法：
每个测试用例都有一对两个字符串，其中包含要解析的文本和由分号分隔的预期结果。
解析函数执行实际的解析并返回一个应该等于预期结果的字符串。
std::string parse(std::string const & line) {
std::string name;
int hours;
rule<> top_rule = ... ; // rule assignes values to 'name' and 'hours'
parse_info<> info = parse(line.c_str(), top_rule);
if(info.full) {
std::stringstream sstr;
sstr << name << ";" << hours;
return sstr.str();
}
return "parser failed.";
}
BOOST_AUTO_TEST_SUITE( TestSuite )
BOOST_AUTO_TEST_CASE( TestCase ) {
BOOST_CHECK_EQUAL(parse("Tom worked for 10 hours."), "Tom;10");
}
BOOST_AUTO_TEST_SUITE_END()
I'm new to Boost.Spirit and Boost.Test and I would like to know how you verify the correctness of your grammars. Below is a simplified version of how I do it at the moment and I'm pretty sure that there's a better way:
Each test case hase a pair of two strings containing the text to parse and the expected result delimited by semicolons.
The parse functions does the actual parsing and returns a string which should be equal to the expected result.
std::string parse(std::string const & line) {
std::string name;
int hours;
rule<> top_rule = ... ; // rule assignes values to 'name' and 'hours'
parse_info<> info = parse(line.c_str(), top_rule);
if(info.full) {
std::stringstream sstr;
sstr << name << ";" << hours;
return sstr.str();
}
return "parser failed.";
}
BOOST_AUTO_TEST_SUITE( TestSuite )
BOOST_AUTO_TEST_CASE( TestCase ) {
BOOST_CHECK_EQUAL(parse("Tom worked for 10 hours."), "Tom;10");
}
BOOST_AUTO_TEST_SUITE_END()
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总的来说，你的方法对我来说似乎很好。 我可能会将测试类分组到具有描述性名称的函数中，例如 TestInvalidGrammar、TestErrorHandling、TestNestedGrammar 等，并从 main 调用这些函数。
我确信您已阅读文档，但请查看 示例（如果有帮助）。
In general, your approach seems fine to me. I would probably group class of tests into function with descriptive names, e.g. TestInvalidGrammar, TestErrorHandling, TestNestedGrammar etc. and have those called from the main.
I am sure you have read documentation but take a look at examples if it helps.
在这里你可以看到他们（boostspirit作者）如何测试他们自己的解析器：http://svn.boost.org/svn/boost/trunk/libs/spirit/test/qi/grammar.cpp 。 对于 qi 的每个部分，您可以在这里找到一个 C++ 文件： http ://svn.boost.org/svn/boost/trunk/libs/spirit/test/qi/。
Here you can see how they (the boost spirit authors) test their own parsers: http://svn.boost.org/svn/boost/trunk/libs/spirit/test/qi/grammar.cpp . For each part of qi you can find a C++ file here: http://svn.boost.org/svn/boost/trunk/libs/spirit/test/qi/.