1 files changed, 91 insertions, 0 deletions
diff --git a/klm/lm/ngram_test.cc b/klm/lm/ngram_test.cc
new file mode 100644
index 00000000..031e0348
--- /dev/null
+++ b/klm/lm/ngram_test.cc
@@ -0,0 +1,91 @@
+#include "lm/ngram.hh"
+
+#include <stdlib.h>
+
+#define BOOST_TEST_MODULE NGramTest
+#include <boost/test/unit_test.hpp>
+
+namespace lm {
+namespace ngram {
+namespace {
+
+#define StartTest(word, ngram, score) \
+  ret = model.FullScore( \
+      state, \
+      model.GetVocabulary().Index(word), \
+      out);\
+  BOOST_CHECK_CLOSE(score, ret.prob, 0.001); \
+  BOOST_CHECK_EQUAL(static_cast<unsigned int>(ngram), ret.ngram_length); \
+  BOOST_CHECK_EQUAL(std::min<unsigned char>(ngram, 5 - 1), out.valid_length_);
+
+#define AppendTest(word, ngram, score) \
+  StartTest(word, ngram, score) \
+  state = out;
+
+template <class M> void Starters(M &model) {
+  FullScoreReturn ret;
+  Model::State state(model.BeginSentenceState());
+  Model::State out;
+
+  StartTest("looking", 2, -0.4846522);
+
+  // , probability plus <s> backoff
+  StartTest(",", 1, -1.383514 + -0.4149733);
+  // <unk> probability plus <s> backoff
+  StartTest("this_is_not_found", 0, -1.995635 + -0.4149733);
+}
+
+template <class M> void Continuation(M &model) {
+  FullScoreReturn ret;
+  Model::State state(model.BeginSentenceState());
+  Model::State out;
+
+  AppendTest("looking", 2, -0.484652);
+  AppendTest("on", 3, -0.348837);
+  AppendTest("a", 4, -0.0155266);
+  AppendTest("little", 5, -0.00306122);
+  State preserve = state;
+  AppendTest("the", 1, -4.04005);
+  AppendTest("biarritz", 1, -1.9889);
+  AppendTest("not_found", 0, -2.29666);
+  AppendTest("more", 1, -1.20632);
+  AppendTest(".", 2, -0.51363);
+  AppendTest("</s>", 3, -0.0191651);
+
+  state = preserve;
+  AppendTest("more", 5, -0.00181395);
+  AppendTest("loin", 5, -0.0432557);
+}
+
+BOOST_AUTO_TEST_CASE(starters_probing) { Model m("test.arpa"); Starters(m); }
+BOOST_AUTO_TEST_CASE(continuation_probing) { Model m("test.arpa"); Continuation(m); }
+BOOST_AUTO_TEST_CASE(starters_sorted) { SortedModel m("test.arpa"); Starters(m); }
+BOOST_AUTO_TEST_CASE(continuation_sorted) { SortedModel m("test.arpa"); Continuation(m); }
+
+BOOST_AUTO_TEST_CASE(write_and_read_probing) {
+  Config config;
+  config.write_mmap = "test.binary";
+  {
+    Model copy_model("test.arpa", config);
+  }
+  Model binary("test.binary");
+  Starters(binary);
+  Continuation(binary);
+}
+
+BOOST_AUTO_TEST_CASE(write_and_read_sorted) {
+  Config config;
+  config.write_mmap = "test.binary";
+  config.prefault = true;
+  {
+    SortedModel copy_model("test.arpa", config);
+  }
+  SortedModel binary("test.binary");
+  Starters(binary);
+  Continuation(binary);
+}
+
+
+} // namespace
+} // namespace ngram
+} // namespace lm