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/* stemtest.cc
*
* Copyright 1999,2000,2001 BrightStation PLC
* Copyright 2002 Ananova Ltd
* Copyright 2002,2003,2004,2007,2008,2009,2012,2015 Olly Betts
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include <config.h>
#include <cstdlib>
#include <string>
#include <fstream>
#include <iostream>
#include <xapian.h>
#include "testsuite.h"
using namespace std;
static const int JUNKSIZE = 2 * 1048576;
static string language;
static Xapian::Stem stemmer;
static string srcdir;
static int seed;
// run stemmers on random text
static bool
test_stemrandom()
{
static const char wordchars[] =
"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789^\0";
tout << "Stemming random text... (seed " << seed << ")" << endl;
srand(seed);
string word;
int stemmed_size = 0;
for (int c = JUNKSIZE; c; --c) {
char ch = wordchars[(rand() >> 8) % sizeof wordchars];
if (ch) {
word += ch;
continue;
}
stemmed_size += stemmer(word).length();
word.resize(0);
}
stemmed_size += stemmer(word).length();
tout << "Input size " << JUNKSIZE << ", stemmed size " << stemmed_size
<< endl;
if (stemmed_size > JUNKSIZE * 101 / 100) {
FAIL_TEST("Stemmed data is significantly bigger than input: "
<< stemmed_size << " vs. " << JUNKSIZE);
}
if (stemmed_size < JUNKSIZE / 2) {
FAIL_TEST("Stemmed data is significantly smaller than input: "
<< stemmed_size << " vs. " << JUNKSIZE);
}
return true;
}
// run stemmers on random junk
static bool
test_stemjunk()
{
tout << "Stemming random junk... (seed " << seed << ")" << endl;
srand(seed);
string word;
int stemmed_size = 0;
for (int c = JUNKSIZE; c; --c) {
char ch = rand() >> 8;
if (ch) {
word += ch;
continue;
}
stemmed_size += stemmer(word).length();
word.resize(0);
}
stemmed_size += stemmer(word).length();
tout << "Input size " << JUNKSIZE << ", stemmed size " << stemmed_size
<< endl;
if (stemmed_size > JUNKSIZE * 101 / 100) {
FAIL_TEST("Stemmed data is significantly bigger than input ("
<< stemmed_size << " vs. " << JUNKSIZE);
}
if (stemmed_size < JUNKSIZE / 2) {
FAIL_TEST("Stemmed data is significantly smaller than input ("
<< stemmed_size << " vs. " << JUNKSIZE);
}
return true;
}
static bool
test_stemdict()
{
string dir = srcdir + "/../../xapian-data/stemming/";
ifstream voc((dir + language + "/voc.txt").c_str());
if (!voc.is_open()) {
SKIP_TEST(language << "/voc.txt not found");
}
ifstream st((dir + language + "/output.txt").c_str());
if (!st.is_open()) {
voc.close();
FAIL_TEST(language << "/output.txt not found");
}
tout << "Testing " << language << " with Snowball dictionary..." << endl;
int pass = 1;
while (true) {
string word, stem, expect;
while (!voc.eof() && !st.eof()) {
getline(voc, word);
getline(st, expect);
stem = stemmer(word);
TEST_EQUAL(stem, expect);
}
voc.close();
st.close();
if (pass == 2) break;
voc.open((dir + language + "/voc2.txt").c_str());
if (!voc.is_open()) break;
st.open((dir + language + "/output2.txt").c_str());
if (!st.is_open()) {
voc.close();
FAIL_TEST(language << "/output2.txt not found");
}
tout << "Testing " << language << " with supplemental dictionary..."
<< endl;
++pass;
}
return true;
}
// ##################################################################
// # End of actual tests #
// ##################################################################
/// The lists of tests to perform
static const test_desc tests[] = {
{"stemrandom", test_stemrandom},
{"stemjunk", test_stemjunk},
{"stemdict", test_stemdict},
{0, 0}
};
int main(int argc, char **argv)
try {
string langs = Xapian::Stem::get_available_languages();
test_driver::add_command_line_option("languages", 'l', &langs);
seed = 42;
string seed_str;
test_driver::add_command_line_option("seed", 's', &seed_str);
test_driver::parse_command_line(argc, argv);
srcdir = test_driver::get_srcdir();
int result = 0;
if (!seed_str.empty()) seed = atoi(seed_str.c_str());
cout << "The random seed is " << seed << endl;
cout << "Please report the seed when reporting a test failure." << endl;
string::size_type b = 0;
while (b != langs.size()) {
string::size_type a = b;
while (b < langs.size() && langs[b] != ' ') ++b;
language.assign(langs, a, b - a);
while (b < langs.size() && langs[b] == ' ') ++b;
cout << "Running tests with " << language << " stemmer..." << endl;
stemmer = Xapian::Stem(language);
result = max(result, test_driver::run(tests));
}
return result;
} catch (const char * e) {
cout << e << endl;
return 1;
}
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