diff --git a/src/test/skiplist_tests.cpp b/src/test/skiplist_tests.cpp index ea301685c9..11762c6ea0 100644 --- a/src/test/skiplist_tests.cpp +++ b/src/test/skiplist_tests.cpp @@ -41,5 +41,61 @@ BOOST_AUTO_TEST_CASE(skiplist_test) } } +BOOST_AUTO_TEST_CASE(getlocator_test) +{ + // Build a main chain 100000 blocks long. + std::vector vHashMain(100000); + std::vector vBlocksMain(100000); + for (unsigned int i=0; inHeight + 1); + } + + // Build a branch that splits off at block 49999, 50000 blocks long. + std::vector vHashSide(50000); + std::vector vBlocksSide(50000); + for (unsigned int i=0; inHeight + 1); + } + + // Build a CChain for the main branch. + CChain chain; + chain.SetTip(&vBlocksMain.back()); + + // Test 100 random starting points for locators. + for (int n=0; n<100; n++) { + int r = insecure_rand() % 150000; + CBlockIndex* tip = (r < 100000) ? &vBlocksMain[r] : &vBlocksSide[r - 100000]; + CBlockLocator locator = chain.GetLocator(tip); + + // The first result must be the block itself, the last one must be genesis. + BOOST_CHECK(locator.vHave.front() == tip->GetBlockHash()); + BOOST_CHECK(locator.vHave.back() == vBlocksMain[0].GetBlockHash()); + + // Entries 1 through 11 (inclusive) go back one step each. + for (unsigned int i = 1; i < 12 && i < locator.vHave.size() - 1; i++) { + BOOST_CHECK_EQUAL(locator.vHave[i].GetLow64(), tip->nHeight - i); + } + + // The further ones (excluding the last one) go back with exponential steps. + unsigned int dist = 2; + for (unsigned int i = 12; i < locator.vHave.size() - 1; i++) { + BOOST_CHECK_EQUAL(locator.vHave[i - 1].GetLow64() - locator.vHave[i].GetLow64(), dist); + dist *= 2; + } + } +} + BOOST_AUTO_TEST_SUITE_END()