add build test for Imprints

tests/test_imprints/imprint_tests.cpp

@@ -2,6 +2,20 @@
 
 class ImprintsTest : public BlissIndexTest {};
 
+TEST_F(ImprintsTest, TestImprint_Build) {
+    index.reset(new bliss::BlissImprintsIndex<size_t, key_type>(64, 64, std::string("unsigned long")));
+    std::vector<key_type> data;
+    GenerateData(data, num_keys, false);
+    std::vector < std::pair<size_t, key_type> > bulkload_data;
+    for (size_t i = 0; i < data.size(); i ++) {
+        bulkload_data.push_back(std::make_pair(i, data[i]));
+    }
+    index->bulkload(bulkload_data);
+    // auto insert_start = data.begin();
+    // auto insert_end = data.end();
+    // executor::execute_inserts(*index, insert_start, insert_end);
+}
+
 TEST_F(ImprintsTest, TestImprint_Random) {
     index.reset(new bliss::BlissImprintsIndex<size_t, key_type>(64, 64, std::string("unsigned long")));
     std::vector<key_type> data;