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/******************************************************
* Presage, an extensible predictive text entry system
* ---------------------------------------------------
*
* Copyright (C) 2008 Matteo Vescovi <matteo.vescovi@yahoo.co.uk>
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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
**********(*)*/
#include "contextChangeDetectorTest.h"
#include "core/charsets.h"
CPPUNIT_TEST_SUITE_REGISTRATION( ContextChangeDetectorTest );
void ContextChangeDetectorTest::setUp()
{
detector = new ContextChangeDetector(reinterpret_cast<const char *>(DEFAULT_WORD_CHARS),
DEFAULT_SEPARATOR_CHARS,
DEFAULT_BLANKSPACE_CHARS,
DEFAULT_CONTROL_CHARS,
false);
}
void ContextChangeDetectorTest::tearDown()
{
delete detector;
}
void ContextChangeDetectorTest::testCharChanges()
{
detector->set_sliding_window_size("10");
const std::string line = "foo bar foobar, foo bar! Foobar foo bar... foobar. ";
const std::string change = "10010001000000100001000001000000010001000100000000010";
for (size_t i = 0; i < line.size(); i++) {
bool expected = (change[i] == '0' ? false : true);
std::string stream = line.substr(0, i+1);
std::stringstream ss;
ss << "Error detected at: " << stream << '|';
CPPUNIT_ASSERT_EQUAL_MESSAGE(ss.str().c_str(), expected, detector->context_change(stream));
detector->update_sliding_window(stream);
}
}
void ContextChangeDetectorTest::testBlockChanges()
{
std::string str = "The quick brown fox jumped over the lazy dog";
detector->set_sliding_window_size("10");
// sliding window is now empty, so new string will trigger a context change
CPPUNIT_ASSERT_EQUAL(true, detector->context_change("The quick"));
// update detector
detector->update_sliding_window("The quick");
// there was no change since last time, should be false
CPPUNIT_ASSERT_EQUAL(false, detector->context_change("The quick"));
// no changes, should be false
CPPUNIT_ASSERT_EQUAL(false, detector->context_change("The quick"));
// still no changes, should still be false
CPPUNIT_ASSERT_EQUAL(false, detector->context_change("The quick"));
}
void ContextChangeDetectorTest::testGetChange()
{
std::string str = "The quick brown fox jumped over the lazy dog";
detector->set_sliding_window_size("10");
// when sliding window is empty, change is equal to stream
CPPUNIT_ASSERT_EQUAL(detector->change(str), str);
// when sliding window contains part of stream, change is equal to text that is in stream and not in sliding window
detector->update_sliding_window ("The quick bro");
CPPUNIT_ASSERT_EQUAL(detector->get_sliding_window(), std::string(" quick bro"));
CPPUNIT_ASSERT_EQUAL(detector->change(str), std::string("wn fox jumped over the lazy dog"));
detector->update_sliding_window ("The quick brow");
CPPUNIT_ASSERT_EQUAL(detector->get_sliding_window(), std::string("quick brow"));
CPPUNIT_ASSERT_EQUAL(detector->change(str), std::string("n fox jumped over the lazy dog"));
detector->update_sliding_window ("The quick brown");
CPPUNIT_ASSERT_EQUAL(detector->get_sliding_window(), std::string("uick brown"));
CPPUNIT_ASSERT_EQUAL(detector->change(str), std::string(" fox jumped over the lazy dog"));
detector->update_sliding_window ("The quick brown ");
CPPUNIT_ASSERT_EQUAL(detector->get_sliding_window(), std::string("ick brown "));
CPPUNIT_ASSERT_EQUAL(detector->change(str), std::string("fox jumped over the lazy dog"));
// remove last char from stream
detector->update_sliding_window ("The quick brown");
CPPUNIT_ASSERT_EQUAL(detector->get_sliding_window(), std::string("uick brown"));
CPPUNIT_ASSERT_EQUAL(detector->change(str), std::string(" fox jumped over the lazy dog"));
// remove last char from stream again
detector->update_sliding_window ("The quick brow");
CPPUNIT_ASSERT_EQUAL(detector->get_sliding_window(), std::string("quick brow"));
CPPUNIT_ASSERT_EQUAL(detector->change(str), std::string("n fox jumped over the lazy dog"));
}
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