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Subject [GitHub] [nifi-minifi-cpp] arpadboda commented on a change in pull request #836: MINIFICPP-1248 Create unit tests for the ConsumeWindowsEventLog processor
Date Mon, 13 Jul 2020 11:09:55 GMT

arpadboda commented on a change in pull request #836:
URL: https://github.com/apache/nifi-minifi-cpp/pull/836#discussion_r453573778



##########
File path: extensions/windows-event-log/tests/BookmarkTests.cpp
##########
@@ -0,0 +1,245 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Bookmark.h"
+
+#include <regex>
+
+#include "TestBase.h"
+#include "utils/gsl.h"
+#include "wel/UniqueEvtHandle.h"
+
+using Bookmark = org::apache::nifi::minifi::processors::Bookmark;
+using unique_evt_handle = org::apache::nifi::minifi::wel::unique_evt_handle;
+using IdGenerator = org::apache::nifi::minifi::utils::IdGenerator;
+
+namespace {
+
+const std::wstring APPLICATION_CHANNEL = L"Application";
+
+constexpr DWORD BOOKMARK_TESTS_OPCODE = 10368;  // random opcode hopefully won't clash with
something important
+
+std::unique_ptr<Bookmark> createBookmark(TestPlan &test_plan,
+                                         const std::wstring &channel,
+                                         const std::string &uuid = IdGenerator::getIdGenerator()->generate().to_string())
{
+  const auto state_manager = test_plan.getStateManagerProvider()->getCoreComponentStateManager(uuid);
+  const auto logger = test_plan.getLogger();
+  return utils::make_unique<Bookmark>(channel, L"*", "", uuid, false, state_manager,
logger);
+}
+
+void reportEvent(const std::wstring& channel, const char* message) {
+  auto event_source = RegisterEventSourceW(nullptr, channel.c_str());
+  auto event_source_deleter = gsl::finally([&event_source](){ DeregisterEventSource(event_source);
});
+  ReportEventA(event_source, EVENTLOG_INFORMATION_TYPE, 0,
+               BOOKMARK_TESTS_OPCODE, nullptr, 1, 0, &message, nullptr);
+}
+
+std::wstring bookmarkHandleAsXml(EVT_HANDLE event) {
+  REQUIRE(event);
+  constexpr std::size_t BUFFER_SIZE = 1024;
+  std::array<wchar_t, BUFFER_SIZE> buffer = {};
+  DWORD buffer_used;
+  DWORD property_count;
+  if (!EvtRender(nullptr, event, EvtRenderBookmark, buffer.size(), buffer.data(), &buffer_used,
&property_count)) {
+    FAIL("Could not render event; error code: " << GetLastError());
+  }
+  return std::wstring{buffer.data()};
+}
+
+std::wstring bookmarkAsXml(const std::unique_ptr<Bookmark>& bookmark) {
+  REQUIRE(bookmark);
+  REQUIRE(*bookmark);
+  return bookmarkHandleAsXml(bookmark->getBookmarkHandleFromXML());
+}
+
+unique_evt_handle queryEvents() {
+  std::wstring query = L"Event/System/EventID=" + std::to_wstring(BOOKMARK_TESTS_OPCODE);
+  unique_evt_handle results{EvtQuery(NULL, APPLICATION_CHANNEL.c_str(), query.c_str(), EvtQueryChannelPath
| EvtQueryReverseDirection)};
+  if (!results) {
+    FAIL("EvtQuery() failed; error code: " << GetLastError());
+  }
+  return results;
+}
+
+unique_evt_handle getFirstEventFromResults(const unique_evt_handle& results) {
+  REQUIRE(results);
+  EVT_HANDLE event_raw_handle = 0;
+  DWORD timeout_ms = 100;
+  DWORD num_results_found = 0;
+  bool result = EvtNext(results.get(), 1, &event_raw_handle, timeout_ms, 0, &num_results_found);

Review comment:
       I just meant embedding in the if statement, but I can live with the current code as
well, not a big deal. 




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