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diff --git a/src/ceph/src/test/librbd/test_mock_fixture.cc b/src/ceph/src/test/librbd/test_mock_fixture.cc
new file mode 100644
index 0000000..fba57b7
--- /dev/null
+++ b/src/ceph/src/test/librbd/test_mock_fixture.cc
@@ -0,0 +1,121 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "test/librbd/test_mock_fixture.h"
+#include "test/librbd/mock/MockImageCtx.h"
+#include "test/librados_test_stub/LibradosTestStub.h"
+#include "test/librados_test_stub/MockTestMemCluster.h"
+
+// template definitions
+#include "librbd/AsyncRequest.cc"
+#include "librbd/AsyncObjectThrottle.cc"
+#include "librbd/operation/Request.cc"
+
+template class librbd::AsyncRequest<librbd::MockImageCtx>;
+template class librbd::AsyncObjectThrottle<librbd::MockImageCtx>;
+template class librbd::operation::Request<librbd::MockImageCtx>;
+
+using ::testing::_;
+using ::testing::DoDefault;
+using ::testing::Return;
+using ::testing::StrEq;
+using ::testing::WithArg;
+
+TestMockFixture::TestClusterRef TestMockFixture::s_test_cluster;
+
+void TestMockFixture::SetUpTestCase() {
+  s_test_cluster = librados_test_stub::get_cluster();
+
+  // use a mock version of the in-memory cluster
+  librados_test_stub::set_cluster(boost::shared_ptr<librados::TestCluster>(
+    new librados::MockTestMemCluster()));
+  TestFixture::SetUpTestCase();
+}
+
+void TestMockFixture::TearDownTestCase() {
+  TestFixture::TearDownTestCase();
+  librados_test_stub::set_cluster(s_test_cluster);
+}
+
+void TestMockFixture::TearDown() {
+  // Mock rados client lives across tests -- reset it to initial state
+  librados::MockTestMemRadosClient *mock_rados_client =
+    get_mock_io_ctx(m_ioctx).get_mock_rados_client();
+  ASSERT_TRUE(mock_rados_client != nullptr);
+
+  ::testing::Mock::VerifyAndClear(mock_rados_client);
+  mock_rados_client->default_to_dispatch();
+
+  TestFixture::TearDown();
+}
+
+void TestMockFixture::expect_unlock_exclusive_lock(librbd::ImageCtx &ictx) {
+  EXPECT_CALL(get_mock_io_ctx(ictx.md_ctx),
+              exec(_, _, StrEq("lock"), StrEq("unlock"), _, _, _))
+                .WillRepeatedly(DoDefault());
+}
+
+void TestMockFixture::expect_op_work_queue(librbd::MockImageCtx &mock_image_ctx) {
+  EXPECT_CALL(*mock_image_ctx.op_work_queue, queue(_, _))
+                .WillRepeatedly(DispatchContext(
+                  mock_image_ctx.image_ctx->op_work_queue));
+}
+
+void TestMockFixture::initialize_features(librbd::ImageCtx *ictx,
+                                          librbd::MockImageCtx &mock_image_ctx,
+                                          librbd::MockExclusiveLock &mock_exclusive_lock,
+                                          librbd::MockJournal &mock_journal,
+                                          librbd::MockObjectMap &mock_object_map) {
+  if (ictx->test_features(RBD_FEATURE_EXCLUSIVE_LOCK)) {
+    mock_image_ctx.exclusive_lock = &mock_exclusive_lock;
+  }
+  if (ictx->test_features(RBD_FEATURE_JOURNALING)) {
+    mock_image_ctx.journal = &mock_journal;
+  }
+  if (ictx->test_features(RBD_FEATURE_OBJECT_MAP)) {
+    mock_image_ctx.object_map = &mock_object_map;
+  }
+}
+
+void TestMockFixture::expect_is_journal_appending(librbd::MockJournal &mock_journal,
+                                                  bool appending) {
+  EXPECT_CALL(mock_journal, is_journal_appending()).WillOnce(Return(appending));
+}
+
+void TestMockFixture::expect_is_journal_replaying(librbd::MockJournal &mock_journal) {
+  EXPECT_CALL(mock_journal, is_journal_replaying()).WillOnce(Return(false));
+}
+
+void TestMockFixture::expect_is_journal_ready(librbd::MockJournal &mock_journal) {
+  EXPECT_CALL(mock_journal, is_journal_ready()).WillOnce(Return(true));
+}
+
+void TestMockFixture::expect_allocate_op_tid(librbd::MockImageCtx &mock_image_ctx) {
+  if (mock_image_ctx.journal != nullptr) {
+    EXPECT_CALL(*mock_image_ctx.journal, allocate_op_tid())
+                  .WillOnce(Return(1U));
+  }
+}
+
+void TestMockFixture::expect_append_op_event(librbd::MockImageCtx &mock_image_ctx,
+                                             bool can_affect_io, int r) {
+  if (mock_image_ctx.journal != nullptr) {
+    if (can_affect_io) {
+      expect_is_journal_replaying(*mock_image_ctx.journal);
+    }
+    expect_is_journal_appending(*mock_image_ctx.journal, true);
+    expect_allocate_op_tid(mock_image_ctx);
+    EXPECT_CALL(*mock_image_ctx.journal, append_op_event_mock(_, _, _))
+                  .WillOnce(WithArg<2>(CompleteContext(r, mock_image_ctx.image_ctx->op_work_queue)));
+  }
+}
+
+void TestMockFixture::expect_commit_op_event(librbd::MockImageCtx &mock_image_ctx, int r) {
+  if (mock_image_ctx.journal != nullptr) {
+    expect_is_journal_appending(*mock_image_ctx.journal, true);
+    expect_is_journal_ready(*mock_image_ctx.journal);
+    EXPECT_CALL(*mock_image_ctx.journal, commit_op_event(1U, r, _))
+                  .WillOnce(WithArg<2>(CompleteContext(r, mock_image_ctx.image_ctx->op_work_queue)));
+  }
+}
+