append basic io test and pass

CMakeLists.txt

@@ -535,3 +535,8 @@ add_executable(test_vtable
         "${PROJECT_SOURCE_DIR}/test/test_vtable.cc"
 )
 target_link_libraries(test_vtable PRIVATE leveldb gtest)
+
+add_executable(test_basicio
+        "${PROJECT_SOURCE_DIR}/test/test_basicio.cc"
+)
+target_link_libraries(test_basicio PRIVATE leveldb gtest)

test/test_basicio.cc

@@ -0,0 +1,75 @@
+#include "gtest/gtest.h"
+#include "leveldb/env.h"
+#include "leveldb/db.h"
+using namespace leveldb;
+
+constexpr int value_size = 2048;
+constexpr int data_size = 128 << 20;
+
+std::map<std::string, std::string> data;
+
+Status OpenDB(std::string dbName, DB **db) {
+  Options options;
+  options.create_if_missing = true;
+  return DB::Open(options, dbName, db);
+}
+
+void InsertData(DB *db) {
+  WriteOptions writeOptions;
+  int key_num = data_size / value_size;
+  srand(0);
+
+  for (int i = 0; i < key_num; i++) {
+    int key_ = rand() % key_num+1;
+    std::string key = std::to_string(key_);
+    std::string value(value_size, 'a');
+    db->Put(writeOptions, key, value);
+    data[key] = value;
+  }
+}
+
+TEST(TestBasicIO, PointGet) {
+  DB *db;
+  if(OpenDB("testdb", &db).ok() == false) {
+    std::cerr << "open db failed" << std::endl;
+    abort();
+  }
+
+  data.clear();
+  InsertData(db);
+
+  ReadOptions readOptions;
+
+  for (auto iter = data.begin(); iter != data.end(); ++iter) {
+    std::string value;
+    db->Get(readOptions, iter->first, &value);
+    ASSERT_TRUE(value == iter->second);
+  }
+
+  delete db;
+}
+
+TEST(TestBasicIO, RangeQuery) {
+  DB *db;
+  if(OpenDB("testdb", &db).ok() == false) {
+    std::cerr << "open db failed" << std::endl;
+    abort();
+  }
+
+  data.clear();
+  InsertData(db);
+
+  ReadOptions readOptions;
+
+  auto iter = db->NewIterator(readOptions);
+  iter->SeekToFirst();
+  while (iter->Valid()) {
+    ASSERT_TRUE(data[iter->key().ToString()] == iter->fields()["1"]);
+    iter->Next();
+  }
+}
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}