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#include "tests.h"
namespace dtrain
{
/*
* approx_equal
*
*/
double
approx_equal( double x, double y )
{
const double EPSILON = 1E-5;
if ( x == 0 ) return fabs( y ) <= EPSILON;
if ( y == 0 ) return fabs( x ) <= EPSILON;
return fabs( x - y ) / max( fabs(x), fabs(y) ) <= EPSILON;
}
/*
* test_ngrams
*
*/
void
test_ngrams()
{
cout << "Testing ngrams..." << endl << endl;
size_t N = 5;
cout << "N = " << N << endl;
vector<int> a; // hyp
vector<int> b; // ref
cout << "a ";
for (size_t i = 1; i <= 8; i++) {
cout << i << " ";
a.push_back(i);
}
cout << endl << "b ";
for (size_t i = 1; i <= 4; i++) {
cout << i << " ";
b.push_back(i);
}
cout << endl << endl;
NgramCounts c = make_ngram_counts( a, b, N );
assert( c.clipped[N-1] == 0 );
assert( c.sum[N-1] == 4 );
c.print();
c += c;
cout << endl;
c.print();
cout << endl;
}
/*
* test_metrics
*
*/
void
test_metrics()
{
cout << "Testing metrics..." << endl << endl;
using namespace boost::assign;
vector<string> a, b;
vector<double> expect_vanilla, expect_smooth, expect_stupid;
a += "a a a a", "a a a a", "a", "a", "b", "a a a a", "a a", "a a a", "a b a"; // hyp
b += "b b b b", "a a a a", "a", "b", "b b b b", "a", "a a", "a a a", "a b b"; // ref
expect_vanilla += 0, 1, 1, 0, 0, .25, 1, 1, 0;
expect_smooth += 0, .9375, .0625, 0, .00311169, .0441942, .1875, .4375, .161587;
expect_stupid += 0, 1, 1, 0, .0497871, .25, 1, 1, .605707;
vector<string> aa, bb;
vector<WordID> aai, bbi;
double vanilla, smooth, stupid;
size_t N = 4;
cout << "N = " << N << endl << endl;
for ( size_t i = 0; i < a.size(); i++ ) {
cout << " hyp: " << a[i] << endl;
cout << " ref: " << b[i] << endl;
aa.clear(); bb.clear(); aai.clear(); bbi.clear();
boost::split( aa, a[i], boost::is_any_of(" ") );
boost::split( bb, b[i], boost::is_any_of(" ") );
register_and_convert( aa, aai );
register_and_convert( bb, bbi );
NgramCounts counts = make_ngram_counts( aai, bbi, N );
vanilla = bleu( counts, aa.size(), bb.size(), N);
smooth = smooth_bleu( counts, aa.size(), bb.size(), N);
stupid = stupid_bleu( counts, aa.size(), bb.size(), N);
assert( approx_equal(vanilla, expect_vanilla[i]) );
assert( approx_equal(smooth, expect_smooth[i]) );
assert( approx_equal(stupid, expect_stupid[i]) );
cout << setw(14) << "bleu = " << vanilla << endl;
cout << setw(14) << "smooth bleu = " << smooth << endl;
cout << setw(14) << "stupid bleu = " << stupid << endl << endl;
}
cout << endl;
}
/*
* test_SetWeights
*
*/
void
test_SetWeights()
{
cout << "Testing Weights::SetWeight..." << endl << endl;
Weights weights;
SparseVector<double> lambdas;
weights.InitSparseVector( &lambdas );
weights.SetWeight( &lambdas, "test", 0 );
weights.SetWeight( &lambdas, "test1", 1 );
WordID fid = FD::Convert( "test2" );
weights.SetWeight( &lambdas, fid, 2 );
string fn = "weights-test";
cout << "FD::NumFeats() " << FD::NumFeats() << endl;
assert( FD::NumFeats() == 4 );
weights.WriteToFile( fn, true );
cout << endl;
}
/*
* run_tests
*
*/
void
run_tests()
{
cout << endl;
test_ngrams();
cout << endl;
test_metrics();
cout << endl;
test_SetWeights();
exit(0);
}
} // namespace
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