Add tests for gettxoutsetinfo, CLevelDBBatch, CLevelDBIterator

Thanks @dexX7.

src/test/leveldbwrapper_tests.cpp

@@ -41,5 +41,80 @@ BOOST_AUTO_TEST_CASE(leveldbwrapper)
         BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
     }
 }
+
+// Test batch operations
+BOOST_AUTO_TEST_CASE(leveldbwrapper_batch)
+{
+    {
+        path ph = temp_directory_path() / unique_path();
+        CLevelDBWrapper dbw(ph, (1 << 20), true, false);
+
+        char key = 'i';
+        uint256 in = GetRandHash();
+        char key2 = 'j';
+        uint256 in2 = GetRandHash();
+        char key3 = 'k';
+        uint256 in3 = GetRandHash();
+
+        uint256 res;
+        CLevelDBBatch batch;
+
+        batch.Write(key, in);
+        batch.Write(key2, in2);
+        batch.Write(key3, in3);
+
+        // Remove key3 before it's even been written
+        batch.Erase(key3);
+
+        dbw.WriteBatch(batch);
+
+        BOOST_CHECK(dbw.Read(key, res));
+        BOOST_CHECK_EQUAL(res.ToString(), in.ToString());
+        BOOST_CHECK(dbw.Read(key2, res));
+        BOOST_CHECK_EQUAL(res.ToString(), in2.ToString());
+
+        // key3 never should've been written
+        BOOST_CHECK(dbw.Read(key3, res) == false);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(leveldbwrapper_iterator)
+{
+    {
+        path ph = temp_directory_path() / unique_path();
+        CLevelDBWrapper dbw(ph, (1 << 20), true, false);
+
+        // The two keys are intentionally chosen for ordering
+        char key = 'j';
+        uint256 in = GetRandHash();
+        BOOST_CHECK(dbw.Write(key, in));
+        char key2 = 'k';
+        uint256 in2 = GetRandHash();
+        BOOST_CHECK(dbw.Write(key2, in2));
+
+        boost::scoped_ptr<CLevelDBIterator> it(const_cast<CLevelDBWrapper*>(&dbw)->NewIterator());
+
+        // Be sure to seek past any earlier key (if it exists)
+        it->Seek(key);
+
+        char key_res;
+        uint256 val_res;
+
+        it->GetKey(key_res);
+        it->GetValue(val_res);
+        BOOST_CHECK_EQUAL(key_res, key);
+        BOOST_CHECK_EQUAL(val_res.ToString(), in.ToString());
+
+        it->Next();
+
+        it->GetKey(key_res);
+        it->GetValue(val_res);
+        BOOST_CHECK_EQUAL(key_res, key2);
+        BOOST_CHECK_EQUAL(val_res.ToString(), in2.ToString());
+
+        it->Next();
+        BOOST_CHECK_EQUAL(it->Valid(), false);
+    }
+}
  
 BOOST_AUTO_TEST_SUITE_END()