Use unique_ptr for dbw (CDBWrapper)

src/test/dbwrapper_tests.cpp

@@ -125,7 +125,7 @@ BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
     create_directories(ph);
 
     // Set up a non-obfuscated wrapper to write some initial data.
-    CDBWrapper* dbw = new CDBWrapper(ph, (1 << 10), false, false, false);
+    std::unique_ptr<CDBWrapper> dbw = std::unique_ptr<CDBWrapper>(new CDBWrapper(ph, (1 << 10), false, false, false));
     char key = 'k';
     uint256 in = InsecureRand256();
     uint256 res;
@@ -135,8 +135,7 @@ BOOST_AUTO_TEST_CASE(existing_data_no_obfuscate)
     BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
 
     // Call the destructor to free leveldb LOCK
-    delete dbw;
-    dbw = nullptr;
+    dbw.reset();
 
     // Now, set up another wrapper that wants to obfuscate the same directory
     CDBWrapper odbw(ph, (1 << 10), false, false, true);
@@ -167,7 +166,7 @@ BOOST_AUTO_TEST_CASE(existing_data_reindex)
     create_directories(ph);
 
     // Set up a non-obfuscated wrapper to write some initial data.
-    CDBWrapper* dbw = new CDBWrapper(ph, (1 << 10), false, false, false);
+    std::unique_ptr<CDBWrapper> dbw = std::unique_ptr<CDBWrapper>(new CDBWrapper(ph, (1 << 10), false, false, false));
     char key = 'k';
     uint256 in = InsecureRand256();
     uint256 res;
@@ -177,8 +176,7 @@ BOOST_AUTO_TEST_CASE(existing_data_reindex)
     BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
 
     // Call the destructor to free leveldb LOCK
-    delete dbw;
-    dbw = nullptr;
+    dbw.reset();
 
     // Simulate a -reindex by wiping the existing data store
     CDBWrapper odbw(ph, (1 << 10), false, true, true);