1 files changed, 102 insertions, 0 deletions
diff --git a/src/boost/libs/accumulators/test/weighted_mean.cpp b/src/boost/libs/accumulators/test/weighted_mean.cpp
new file mode 100644
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+++ b/src/boost/libs/accumulators/test/weighted_mean.cpp
@@ -0,0 +1,102 @@
+//  (C) Copyright Eric Niebler 2005.
+//  Use, modification and distribution are subject to 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/test/unit_test.hpp>
+#include <boost/test/floating_point_comparison.hpp>
+#include <boost/accumulators/accumulators.hpp>
+#include <boost/accumulators/statistics/stats.hpp>
+#include <boost/accumulators/statistics/weighted_mean.hpp>
+#include <boost/accumulators/statistics/variates/covariate.hpp>
+
+using namespace boost;
+using namespace unit_test;
+using namespace accumulators;
+
+template<typename T>
+void assert_is_double(T const &)
+{
+    BOOST_MPL_ASSERT((is_same<T, double>));
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// test_stat
+//
+void test_stat()
+{
+        accumulator_set<
+        int
+      , stats<
+            tag::weighted_mean
+          , tag::mean_of_weights
+          , tag::weighted_mean_of_variates<int, tag::covariate1>
+        >
+      , int
+    > acc, test_acc(sample = 0);
+
+    acc(1, weight = 2, covariate1 = 3);
+    BOOST_CHECK_CLOSE(1., weighted_mean(acc), 1e-5);
+    BOOST_CHECK_EQUAL(1u, count(acc));
+    BOOST_CHECK_EQUAL(2, sum(acc));
+    BOOST_CHECK_CLOSE(2., mean_of_weights(acc), 1e-5);
+    BOOST_CHECK_CLOSE(3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
+
+    acc(0, weight = 4, covariate1 = 4);
+    BOOST_CHECK_CLOSE(1./3., weighted_mean(acc), 1e-5);
+    BOOST_CHECK_EQUAL(2u, count(acc));
+    BOOST_CHECK_EQUAL(2, sum(acc));
+    BOOST_CHECK_CLOSE(3., mean_of_weights(acc), 1e-5);
+    BOOST_CHECK_CLOSE(11./3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
+
+    acc(2, weight = 9, covariate1 = 8);
+    BOOST_CHECK_CLOSE(4./3., weighted_mean(acc), 1e-5);
+    BOOST_CHECK_EQUAL(3u, count(acc));
+    BOOST_CHECK_EQUAL(20, sum(acc));
+    BOOST_CHECK_CLOSE(5., mean_of_weights(acc), 1e-5);
+    BOOST_CHECK_CLOSE(94./15., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc)), 1e-5);
+
+    assert_is_double(mean(acc));
+
+    accumulator_set<
+        int
+      , stats<
+            tag::weighted_mean(immediate)
+          , tag::mean_of_weights(immediate)
+          , tag::weighted_mean_of_variates<int, tag::covariate1>(immediate)
+        >
+      , int
+    > acc2, test_acc2(sample = 0);
+
+    acc2(1, weight = 2, covariate1 = 3);
+    BOOST_CHECK_CLOSE(1., weighted_mean(acc2), 1e-5);
+    BOOST_CHECK_EQUAL(1u, count(acc2));
+    BOOST_CHECK_CLOSE(2., mean_of_weights(acc2), 1e-5);
+    BOOST_CHECK_CLOSE(3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
+
+    acc2(0, weight = 4, covariate1 = 4);
+    BOOST_CHECK_CLOSE(1./3., weighted_mean(acc2), 1e-5);
+    BOOST_CHECK_EQUAL(2u, count(acc2));
+    BOOST_CHECK_CLOSE(3., mean_of_weights(acc2), 1e-5);
+    BOOST_CHECK_CLOSE(11./3., (accumulators::weighted_mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
+
+    acc2(2, weight = 9, covariate1 = 8);
+    BOOST_CHECK_CLOSE(4./3., weighted_mean(acc2), 1e-5);
+    BOOST_CHECK_EQUAL(3u, count(acc2));
+    BOOST_CHECK_CLOSE(5., mean_of_weights(acc2), 1e-5);
+    BOOST_CHECK_CLOSE(94./15., (accumulators::mean_of_variates<int, tag::covariate1>(acc2)), 1e-5);
+
+    assert_is_double(mean(acc2));
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// init_unit_test_suite
+//
+test_suite* init_unit_test_suite( int argc, char* argv[] )
+{
+    test_suite *test = BOOST_TEST_SUITE("weighted_mean test");
+
+    test->add(BOOST_TEST_CASE(&test_stat));
+
+    return test;
+}