blockfilter: Simple test for GCSFilter construction and Match.

src/Makefile.test.include

@@ -39,6 +39,7 @@ BITCOIN_TESTS =\
   test/bip32_tests.cpp \
   test/blockchain_tests.cpp \
   test/blockencodings_tests.cpp \
+  test/blockfilter_tests.cpp \
   test/bloom_tests.cpp \
   test/bswap_tests.cpp \
   test/checkqueue_tests.cpp \

src/test/blockfilter_tests.cpp

@@ -0,0 +1,34 @@
+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <blockfilter.h>
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(blockfilter_tests)
+
+BOOST_AUTO_TEST_CASE(gcsfilter_test)
+{
+    GCSFilter::ElementSet included_elements, excluded_elements;
+    for (int i = 0; i < 100; ++i) {
+        GCSFilter::Element element1(32);
+        element1[0] = i;
+        included_elements.insert(std::move(element1));
+
+        GCSFilter::Element element2(32);
+        element2[1] = i;
+        excluded_elements.insert(std::move(element2));
+    }
+
+    GCSFilter filter(0, 0, 10, 1 << 10, included_elements);
+    for (const auto& element : included_elements) {
+        BOOST_CHECK(filter.Match(element));
+
+        auto insertion = excluded_elements.insert(element);
+        BOOST_CHECK(filter.MatchAny(excluded_elements));
+        excluded_elements.erase(insertion.first);
+    }
+}
+
+BOOST_AUTO_TEST_SUITE_END()