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diff --git a/src/ceph/src/test/mon/test_mon_types.cc b/src/ceph/src/test/mon/test_mon_types.cc
new file mode 100644
index 0000000..3ffb49d
--- /dev/null
+++ b/src/ceph/src/test/mon/test_mon_types.cc
@@ -0,0 +1,141 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2012 Inktank
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+#include <iostream>
+#include "mon/mon_types.h"
+
+#include "gtest/gtest.h"
+
+TEST(mon_features, supported_v_persistent) {
+
+  mon_feature_t supported = ceph::features::mon::get_supported();
+  mon_feature_t persistent = ceph::features::mon::get_persistent();
+
+  ASSERT_EQ(supported.intersection(persistent), persistent);
+  ASSERT_TRUE(supported.contains_all(persistent));
+
+  mon_feature_t diff = supported.diff(persistent);
+  ASSERT_TRUE((persistent | diff) == supported);
+  ASSERT_TRUE((supported & persistent) == persistent);
+}
+
+TEST(mon_features, binary_ops) {
+
+  mon_feature_t FEATURE_NONE(0ULL);
+  mon_feature_t FEATURE_A((1ULL << 1));
+  mon_feature_t FEATURE_B((1ULL << 2));
+  mon_feature_t FEATURE_C((1ULL << 3));
+  mon_feature_t FEATURE_D((1ULL << 4));
+
+  mon_feature_t FEATURE_ALL(
+      FEATURE_A | FEATURE_B |
+      FEATURE_C | FEATURE_D
+  );
+
+  mon_feature_t foo(FEATURE_A|FEATURE_B);
+  mon_feature_t bar(FEATURE_C|FEATURE_D);
+
+  ASSERT_EQ(FEATURE_A|FEATURE_B, foo);
+  ASSERT_EQ(FEATURE_C|FEATURE_D, bar);
+
+  ASSERT_NE(FEATURE_C, foo);
+  ASSERT_NE(FEATURE_B, bar);
+  ASSERT_NE(FEATURE_NONE, foo);
+  ASSERT_NE(FEATURE_NONE, bar);
+
+  ASSERT_FALSE(foo.empty());
+  ASSERT_FALSE(bar.empty());
+  ASSERT_TRUE(FEATURE_NONE.empty());
+
+  ASSERT_EQ(FEATURE_ALL, (foo ^ bar));
+  ASSERT_EQ(FEATURE_NONE, (foo & bar));
+
+  mon_feature_t baz = foo;
+  ASSERT_EQ(baz, foo);
+
+  baz |= bar;
+  ASSERT_EQ(FEATURE_ALL, baz);
+  baz ^= foo;
+  ASSERT_EQ(baz, bar);
+
+  baz |= FEATURE_A;
+  ASSERT_EQ(FEATURE_C, baz & FEATURE_C);
+  ASSERT_EQ((FEATURE_A|FEATURE_D), baz & (FEATURE_A|FEATURE_D));
+  ASSERT_EQ(FEATURE_B|FEATURE_C|FEATURE_D, (baz ^ foo));
+}
+
+TEST(mon_features, set_funcs) {
+
+  mon_feature_t FEATURE_NONE(0ULL);
+  mon_feature_t FEATURE_A((1ULL << 1));
+  mon_feature_t FEATURE_B((1ULL << 2));
+  mon_feature_t FEATURE_C((1ULL << 3));
+  mon_feature_t FEATURE_D((1ULL << 4));
+
+  mon_feature_t FEATURE_ALL(
+      FEATURE_A | FEATURE_B |
+      FEATURE_C | FEATURE_D
+  );
+
+  mon_feature_t foo(FEATURE_A|FEATURE_B);
+  mon_feature_t bar(FEATURE_C|FEATURE_D);
+
+  ASSERT_TRUE(FEATURE_ALL.contains_all(foo));
+  ASSERT_TRUE(FEATURE_ALL.contains_all(bar));
+  ASSERT_TRUE(FEATURE_ALL.contains_all(foo|bar));
+
+  ASSERT_EQ(foo.diff(bar), foo);
+  ASSERT_EQ(bar.diff(foo), bar);
+  ASSERT_EQ(FEATURE_ALL.diff(foo), bar);
+  ASSERT_EQ(FEATURE_ALL.diff(bar), foo);
+
+  ASSERT_TRUE(foo.contains_any(FEATURE_A|bar));
+  ASSERT_TRUE(bar.contains_any(FEATURE_ALL));
+  ASSERT_TRUE(FEATURE_ALL.contains_any(foo));
+
+  mon_feature_t FEATURE_X((1ULL << 10));
+
+  ASSERT_FALSE(FEATURE_ALL.contains_any(FEATURE_X));
+  ASSERT_FALSE(FEATURE_ALL.contains_all(FEATURE_X));
+  ASSERT_EQ(FEATURE_ALL.diff(FEATURE_X), FEATURE_ALL);
+
+  ASSERT_EQ(foo.intersection(FEATURE_ALL), foo);
+  ASSERT_EQ(bar.intersection(FEATURE_ALL), bar);
+}
+
+TEST(mon_features, set_unset) {
+
+  mon_feature_t FEATURE_A((1ULL << 1));
+  mon_feature_t FEATURE_B((1ULL << 2));
+  mon_feature_t FEATURE_C((1ULL << 3));
+
+  mon_feature_t foo;
+  ASSERT_EQ(ceph::features::mon::FEATURE_NONE, foo);
+
+  foo.set_feature(FEATURE_A);
+  ASSERT_EQ(FEATURE_A, foo);
+  ASSERT_TRUE(foo.contains_all(FEATURE_A));
+
+  foo.set_feature(FEATURE_B|FEATURE_C);
+  ASSERT_EQ((FEATURE_A|FEATURE_B|FEATURE_C), foo);
+  ASSERT_TRUE(foo.contains_all((FEATURE_A|FEATURE_B|FEATURE_C)));
+
+  foo.unset_feature(FEATURE_A);
+  ASSERT_EQ((FEATURE_B|FEATURE_C), foo);
+  ASSERT_FALSE(foo.contains_any(FEATURE_A));
+  ASSERT_TRUE(foo.contains_all((FEATURE_B|FEATURE_C)));
+
+  foo.unset_feature(FEATURE_B|FEATURE_C);
+  ASSERT_EQ(ceph::features::mon::FEATURE_NONE, foo);
+  ASSERT_FALSE(foo.contains_any(FEATURE_A|FEATURE_B|FEATURE_C));
+}