test-re2.cc

#include <string>
#include <re2/re2.h>
#include <iostream>
void test_encoding(std::string enc, bool ignored){
std::cout << "testing " << enc << "\n";
        RE2 re2_parser("^\\s*([\\w-]+|\\*)\\s*(?:;\\s*q\\s*=\\s*([0-9]+(?:\\.[0-9]+)?)\\s*)?(?:,|$)");
        re2::StringPiece encodings_re2(enc);
        std::string name;
        std::string qvalue;
        while (RE2::FindAndConsume(&encodings_re2, re2_parser, &name, &qvalue)) {
std::cout << "found " << name << ": " << qvalue << "\n"; 
        }

    }

int main()     {
     // These encodings are valid and should result in compression                                                                                                         
    test_encoding("gzip", true);
    test_encoding("gzip", true);
    test_encoding("gzip ;q=001", true);
    test_encoding("gzip;q =0.1", true);
    test_encoding("gzip  ;q= 1000.11111  ", true);
    test_encoding("  identity;q=1000.1111  ,  gzip;q=1000.11111", true);
    test_encoding("compress, gzip", true);
    test_encoding("*", true);
    test_encoding("compress;q=0.5, gzip;q=1.0", true);
    test_encoding("gzip;q=1.0, identity; q=0.5, *;q=0", true);
    test_encoding("geewhiz;q=1.0,geezip;q=2.0,*;q=0.5", true);
    test_encoding("geewhiz;q=0.0,geezip;q=2.2,*;q=3", true);

    // These encodings are valid but should not result in compression                                                                                                     
    test_encoding("", false);
    test_encoding("*;q=0.0", false);
    test_encoding("gzip;q=0.1,identity;q=0.2", false);
    test_encoding("gzip;q=1,*;q=1.84", false);
    test_encoding("identity;q=1,*;q=0.5", false);
    test_encoding("geewhiz", false);
    test_encoding("geewhiz;q=1.0", false);
    test_encoding("geewhiz;q=1.0,geezip;q=2.0", false);

    // These encodings have bad syntax and should fail                                                                                                                    
    test_encoding("gzip:q=0.1", false);
    test_encoding("gzip;q=0 .1", false);
    test_encoding("gzip;q=0. 1", false);
    test_encoding("gzip:q=0x1", false);
    test_encoding("gzip;q=", false);
    test_encoding("gzip;q", false);
    test_encoding("gzip;=0.5", false);
    test_encoding("gzip=9.9", false);
    test_encoding("gzip;", false);
    test_encoding("gzip;s=0.6", false);
    test_encoding("gzip;deflate", false);
    test_encoding("gzip,deflate,*=0.0", false);
    test_encoding("g^zip", false);
    test_encoding("g_zip", false);
 }