SERVER-31767 Provide a window of snapshot history that is accessible for PIT reads

1 files changed, 70 insertions, 0 deletions

diff --git a/src/mongo/db/service_context_devnull_test_fixture.cpp b/src/mongo/db/service_context_devnull_test_fixture.cpp
new file mode 100644
index 00000000000..cefea8a0053
--- /dev/null
+++ b/src/mongo/db/service_context_devnull_test_fixture.cpp
@@ -0,0 +1,70 @@
+/**
+ *    Copyright (C) 2018 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/service_context_devnull_test_fixture.h"
+
+#include "mongo/db/client.h"
+#include "mongo/db/operation_context.h"
+#include "mongo/db/service_context.h"
+#include "mongo/db/service_context_d.h"
+#include "mongo/db/storage/storage_engine_init.h"
+#include "mongo/stdx/memory.h"
+#include "mongo/unittest/temp_dir.h"
+#include "mongo/util/assert_util.h"
+
+namespace mongo {
+
+void ServiceContextDevnullTestFixture::setUp() {
+    Test::setUp();
+    Client::initThread(getThreadName());
+
+    auto const serviceContext = getServiceContext();
+    if (!serviceContext->getStorageEngine()) {
+        // When using the 'devnull' storage engine, it is fine for the temporary directory to
+        // go away after the global storage engine is initialized.
+        unittest::TempDir tempDir("service_context_devnull_test");
+        mongo::storageGlobalParams.dbpath = tempDir.path();
+        mongo::storageGlobalParams.engine = "devnull";
+        mongo::storageGlobalParams.engineSetByUser = true;
+        createLockFile(serviceContext);
+        initializeStorageEngine(serviceContext);
+    }
+}
+
+void ServiceContextDevnullTestFixture::tearDown() {
+    Client::destroy();
+    Test::tearDown();
+}
+
+ServiceContext* ServiceContextDevnullTestFixture::getServiceContext() {
+    return getGlobalServiceContext();
+}
+
+}  // namespace mongo