From 2e605eb2745e56619b16fdbcb8095e0a6543ab27 Mon Sep 17 00:00:00 2001
From: Patrick Simianer <p@simianer.de>
Date: Wed, 3 Aug 2011 01:29:52 +0200
Subject: refactoring, cleaning up

---
 dtrain/tests.cc | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 dtrain/tests.cc

(limited to 'dtrain/tests.cc')

diff --git a/dtrain/tests.cc b/dtrain/tests.cc
new file mode 100644
index 00000000..997eafbb
--- /dev/null
+++ b/dtrain/tests.cc
@@ -0,0 +1,141 @@
+#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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