update source to Ceph Pacific 16.2.2

[ceph.git] / ceph / src / boost / libs / histogram / test / accumulators_mean_test.cpp

diff --git a/ceph/src/boost/libs/histogram/test/accumulators_mean_test.cpp b/ceph/src/boost/libs/histogram/test/accumulators_mean_test.cpp
new file mode 100644 (file)
index 0000000..d9a3c5d
--- /dev/null
+++ b/ceph/src/boost/libs/histogram/test/accumulators_mean_test.cpp
@@ -0,0 +1,69 @@
+// Copyright 2015-2018 Hans Dembinski
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/histogram/accumulators/mean.hpp>
+#include <boost/histogram/accumulators/ostream.hpp>
+#include <boost/histogram/weight.hpp>
+#include <sstream>
+#include "is_close.hpp"
+#include "throw_exception.hpp"
+#include "utility_str.hpp"
+
+using namespace boost::histogram;
+using namespace std::literals;
+
+int main() {
+  using m_t = accumulators::mean<double>;
+  m_t a;
+  BOOST_TEST_EQ(a.count(), 0);
+  BOOST_TEST_EQ(a, m_t{});
+
+  a(4);
+  a(7);
+  a(13);
+  a(16);
+
+  BOOST_TEST_EQ(a.count(), 4);
+  BOOST_TEST_EQ(a.value(), 10);
+  BOOST_TEST_EQ(a.variance(), 30);
+
+  BOOST_TEST_EQ(str(a), "mean(4, 10, 30)"s);
+  BOOST_TEST_EQ(str(a, 20, false), "     mean(4, 10, 30)"s);
+  BOOST_TEST_EQ(str(a, 20, true), "mean(4, 10, 30)     "s);
+
+  m_t b;
+  b(1e8 + 4);
+  b(1e8 + 7);
+  b(1e8 + 13);
+  b(1e8 + 16);
+
+  BOOST_TEST_EQ(b.count(), 4);
+  BOOST_TEST_EQ(b.value(), 1e8 + 10);
+  BOOST_TEST_EQ(b.variance(), 30);
+
+  auto c = a;
+  c += a; // same as feeding all samples twice
+
+  BOOST_TEST_EQ(c.count(), 8);
+  BOOST_TEST_EQ(c.value(), 10);
+  BOOST_TEST_IS_CLOSE(c.variance(), 25.714, 1e-3);
+
+  // also same as feeding all samples twice
+  m_t d;
+  d(weight(2), 4);
+  d(weight(2), 7);
+  d(weight(2), 13);
+  d(weight(2), 16);
+
+  BOOST_TEST_EQ(d, c);
+
+  BOOST_TEST_EQ(m_t() += m_t(), m_t());
+  BOOST_TEST_EQ(m_t(1, 2, 3) += m_t(), m_t(1, 2, 3));
+  BOOST_TEST_EQ(m_t() += m_t(1, 2, 3), m_t(1, 2, 3));
+
+  return boost::report_errors();
+}