add test cases to bi-gram

diff --git a/tests/storage/test_ngram.cpp b/tests/storage/test_ngram.cpp
index 7fc1b85..9577167 100644 (file)
--- a/tests/storage/test_ngram.cpp
+++ b/tests/storage/test_ngram.cpp
@@ -74,4 +74,9 @@ int main(int argc, char * argv[]){
        phrase_token_t * token = &g_array_index(items, phrase_token_t, i);
        printf("item:%d\n", *token);
     }
+
+    assert(bigram.load_db("/tmp/test.db"));
+    assert(bigram.save_db("/tmp/test.db"));
+
+    return 0;
 }