diff options
| -rw-r--r-- | src/test/timedata_tests.cpp | 65 |
1 files changed, 64 insertions, 1 deletions
diff --git a/src/test/timedata_tests.cpp b/src/test/timedata_tests.cpp index b4c0e6a0f4..7b00222ab7 100644 --- a/src/test/timedata_tests.cpp +++ b/src/test/timedata_tests.cpp @@ -2,8 +2,14 @@ // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. // -#include <timedata.h> + +#include <netaddress.h> +#include <noui.h> #include <test/setup_common.h> +#include <timedata.h> +#include <warnings.h> + +#include <string> #include <boost/test/unit_test.hpp> @@ -34,4 +40,61 @@ BOOST_AUTO_TEST_CASE(util_MedianFilter) BOOST_CHECK_EQUAL(filter.median(), 7); } +static void MultiAddTimeData(int n, int64_t offset) +{ + static int cnt = 0; + for (int i = 0; i < n; ++i) { + CNetAddr addr; + addr.SetInternal(std::to_string(++cnt)); + AddTimeData(addr, offset); + } +} + + +BOOST_AUTO_TEST_CASE(addtimedata) +{ + BOOST_CHECK_EQUAL(GetTimeOffset(), 0); + + //Part 1: Add large offsets to test a warning message that our clock may be wrong. + MultiAddTimeData(3, DEFAULT_MAX_TIME_ADJUSTMENT + 1); + // Filter size is 1 + 3 = 4: It is always initialized with a single element (offset 0) + + noui_suppress(); + MultiAddTimeData(1, DEFAULT_MAX_TIME_ADJUSTMENT + 1); //filter size 5 + noui_reconnect(); + + BOOST_CHECK(GetWarnings("gui").find("clock is wrong") != std::string::npos); + + // nTimeOffset is not changed if the median of offsets exceeds DEFAULT_MAX_TIME_ADJUSTMENT + BOOST_CHECK_EQUAL(GetTimeOffset(), 0); + + // Part 2: Test positive and negative medians by adding more offsets + MultiAddTimeData(4, 100); // filter size 9 + BOOST_CHECK_EQUAL(GetTimeOffset(), 100); + MultiAddTimeData(10, -100); //filter size 19 + BOOST_CHECK_EQUAL(GetTimeOffset(), -100); + + // Part 3: Test behaviour when filter has reached maximum number of offsets + const int MAX_SAMPLES = 200; + int nfill = (MAX_SAMPLES - 3 - 19) / 2; //89 + MultiAddTimeData(nfill, 100); + MultiAddTimeData(nfill, -100); //filter size MAX_SAMPLES - 3 + BOOST_CHECK_EQUAL(GetTimeOffset(), -100); + + MultiAddTimeData(2, 100); + //filter size MAX_SAMPLES -1, median is the initial 0 offset + //since we added same number of positive/negative offsets + + BOOST_CHECK_EQUAL(GetTimeOffset(), 0); + + // After the number of offsets has reached MAX_SAMPLES -1 (=199), nTimeOffset will never change + // because it is only updated when the number of elements in the filter becomes odd. It was decided + // not to fix this because it prevents possible attacks. See the comment in AddTimeData() or issue #4521 + // for a more detailed explanation. + MultiAddTimeData(2, 100); // filter median is 100 now, but nTimeOffset will not change + BOOST_CHECK_EQUAL(GetTimeOffset(), 0); + + // We want this test to end with nTimeOffset==0, otherwise subsequent tests of the suite will fail. +} + BOOST_AUTO_TEST_SUITE_END() |