1 files changed, 54 insertions, 0 deletions
diff --git a/src/boost/libs/accumulators/test/external_weights.cpp b/src/boost/libs/accumulators/test/external_weights.cpp
new file mode 100644
index 00000000..4a904b2e
--- /dev/null
+++ b/src/boost/libs/accumulators/test/external_weights.cpp
@@ -0,0 +1,54 @@
+//  (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>
+
+using namespace boost;
+using namespace unit_test;
+using namespace accumulators;
+
+///////////////////////////////////////////////////////////////////////////////
+// test_stat
+//
+void test_stat()
+{
+    accumulator_set<int, stats<tag::weighted_mean>, external<int> > acc;
+    accumulator_set<void, stats<tag::sum_of_weights>, int> weight_acc;
+
+    acc(10, weight = 2);                        //  20
+    weight_acc(weight = 2);                     //
+    BOOST_CHECK_EQUAL(2, sum_of_weights(weight_acc));   //
+                                                //
+    acc(6, weight = 3);                         //  18
+    weight_acc(weight = 3);                     //
+    BOOST_CHECK_EQUAL(5, sum_of_weights(weight_acc));   //
+                                                //
+    acc(4, weight = 4);                         //  16
+    weight_acc(weight = 4);                     //
+    BOOST_CHECK_EQUAL(9, sum_of_weights(weight_acc));   //
+                                                //
+    acc(6, weight = 5);                         //+ 30
+    weight_acc(weight = 5);                     //
+    BOOST_CHECK_EQUAL(14, sum_of_weights(weight_acc));  //
+                                                //= 84  / 14 = 6
+
+    BOOST_CHECK_CLOSE(6., weighted_mean(acc, weights = weight_acc), 1e-5);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// init_unit_test_suite
+//
+test_suite* init_unit_test_suite( int argc, char* argv[] )
+{
+    test_suite *test = BOOST_TEST_SUITE("external_weights test");
+
+    test->add(BOOST_TEST_CASE(&test_stat));
+
+    return test;
+}