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    1: // Copyright (c) 2005, Google Inc.
    2: // All rights reserved.
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    4: // Redistribution and use in source and binary forms, with or without
    5: // modification, are permitted provided that the following conditions are
    6: // met:
    7: //
    8: //     * Redistributions of source code must retain the above copyright
    9: // notice, this list of conditions and the following disclaimer.
   10: //     * Redistributions in binary form must reproduce the above
   11: // copyright notice, this list of conditions and the following disclaimer
   12: // in the documentation and/or other materials provided with the
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   15: // contributors may be used to endorse or promote products derived from
   16: // this software without specific prior written permission.
   17: //
   18: // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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   20: // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   21: // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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   24: // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25: // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26: // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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   28: // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29: //
   30: // Author: Greg J. Badros
   31: //
   32: // Unittest for scanner, especially GetNextComments and GetComments()
   33: // functionality.
   34: 
   35: #ifdef HAVE_CONFIG_H
   36: #include "config.h"
   37: #endif
   38: 
   39: #include <stdio.h>
   40: #include <string.h>      /* for strchr */
   41: #include <string>
   42: #include <vector>
   43: 
   44: #include "pcrecpp.h"
   45: #include "pcre_stringpiece.h"
   46: #include "pcre_scanner.h"
   47: 
   48: #define FLAGS_unittest_stack_size   49152
   49: 
   50: // Dies with a fatal error if the two values are not equal.
   51: #define CHECK_EQ(a, b)  do {                                    \
   52:   if ( (a) != (b) ) {                                           \
   53:     fprintf(stderr, "%s:%d: Check failed because %s != %s\n",   \
   54:             __FILE__, __LINE__, #a, #b);                        \
   55:     exit(1);                                                    \
   56:   }                                                             \
   57: } while (0)
   58: 
   59: using std::vector;
   60: using pcrecpp::StringPiece;
   61: using pcrecpp::Scanner;
   62: 
   63: static void TestScanner() {
   64:   const char input[] = "\n"
   65:                        "alpha = 1; // this sets alpha\n"
   66:                        "bravo = 2; // bravo is set here\n"
   67:                        "gamma = 33; /* and here is gamma */\n";
   68: 
   69:   const char *re = "(\\w+) = (\\d+);";
   70: 
   71:   Scanner s(input);
   72:   string var;
   73:   int number;
   74:   s.SkipCXXComments();
   75:   s.set_save_comments(true);
   76:   vector<StringPiece> comments;
   77: 
   78:   s.Consume(re, &var, &number);
   79:   CHECK_EQ(var, "alpha");
   80:   CHECK_EQ(number, 1);
   81:   CHECK_EQ(s.LineNumber(), 3);
   82:   s.GetNextComments(&comments);
   83:   CHECK_EQ(comments.size(), 1);
   84:   CHECK_EQ(comments[0].as_string(), " // this sets alpha\n");
   85:   comments.resize(0);
   86: 
   87:   s.Consume(re, &var, &number);
   88:   CHECK_EQ(var, "bravo");
   89:   CHECK_EQ(number, 2);
   90:   s.GetNextComments(&comments);
   91:   CHECK_EQ(comments.size(), 1);
   92:   CHECK_EQ(comments[0].as_string(), " // bravo is set here\n");
   93:   comments.resize(0);
   94: 
   95:   s.Consume(re, &var, &number);
   96:   CHECK_EQ(var, "gamma");
   97:   CHECK_EQ(number, 33);
   98:   s.GetNextComments(&comments);
   99:   CHECK_EQ(comments.size(), 1);
  100:   CHECK_EQ(comments[0].as_string(), " /* and here is gamma */\n");
  101:   comments.resize(0);
  102: 
  103:   s.GetComments(0, sizeof(input), &comments);
  104:   CHECK_EQ(comments.size(), 3);
  105:   CHECK_EQ(comments[0].as_string(), " // this sets alpha\n");
  106:   CHECK_EQ(comments[1].as_string(), " // bravo is set here\n");
  107:   CHECK_EQ(comments[2].as_string(), " /* and here is gamma */\n");
  108:   comments.resize(0);
  109: 
  110:   s.GetComments(0, (int)(strchr(input, '/') - input), &comments);
  111:   CHECK_EQ(comments.size(), 0);
  112:   comments.resize(0);
  113: 
  114:   s.GetComments((int)(strchr(input, '/') - input - 1), sizeof(input),
  115:                 &comments);
  116:   CHECK_EQ(comments.size(), 3);
  117:   CHECK_EQ(comments[0].as_string(), " // this sets alpha\n");
  118:   CHECK_EQ(comments[1].as_string(), " // bravo is set here\n");
  119:   CHECK_EQ(comments[2].as_string(), " /* and here is gamma */\n");
  120:   comments.resize(0);
  121: 
  122:   s.GetComments((int)(strchr(input, '/') - input - 1),
  123:                 (int)(strchr(input + 1, '\n') - input + 1), &comments);
  124:   CHECK_EQ(comments.size(), 1);
  125:   CHECK_EQ(comments[0].as_string(), " // this sets alpha\n");
  126:   comments.resize(0);
  127: }
  128: 
  129: static void TestBigComment() {
  130:   string input;
  131:   for (int i = 0; i < 1024; ++i) {
  132:     char buf[1024];  // definitely big enough
  133:     sprintf(buf, "    # Comment %d\n", i);
  134:     input += buf;
  135:   }
  136:   input += "name = value;\n";
  137: 
  138:   Scanner s(input.c_str());
  139:   s.SetSkipExpression("\\s+|#.*\n");
  140: 
  141:   string name;
  142:   string value;
  143:   s.Consume("(\\w+) = (\\w+);", &name, &value);
  144:   CHECK_EQ(name, "name");
  145:   CHECK_EQ(value, "value");
  146: }
  147: 
  148: // TODO: also test scanner and big-comment in a thread with a
  149: //       small stack size
  150: 
  151: int main(int argc, char** argv) {
  152:   TestScanner();
  153:   TestBigComment();
  154: 
  155:   // Done
  156:   printf("OK\n");
  157: 
  158:   return 0;
  159: }