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add a test for the long term weight cache
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tests/unit_tests/long_term_block_weight.cpp

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@@ -407,3 +407,38 @@ TEST(long_term_block_weight, long_growth_spike_and_drop)
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ASSERT_GT(long_term_effective_median_block_weight, 300000 * 1.07);
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ASSERT_LT(long_term_effective_median_block_weight, 300000 * 1.09);
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}
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TEST(long_term_block_weight, cache_matches_true_value)
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{
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PREFIX(16);
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// Add big blocks to increase the block weight limit
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for (uint64_t h = 0; h <= 2000; ++h)
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{
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size_t w = bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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bc->update_next_cumulative_weight_limit();
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}
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ASSERT_GT(bc->get_current_cumulative_block_weight_limit() * 10/17 , 300000);
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// Add small blocks to the top of the chain
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for (uint64_t h = 2000; h <= 5001; ++h)
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{
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size_t w = (bc->get_current_cumulative_block_weight_median() * 10/17) - 1000;
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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bc->update_next_cumulative_weight_limit();
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}
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// get the weight limit
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uint64_t weight_limit = bc->get_current_cumulative_block_weight_limit();
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// refresh the cache
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bc->m_long_term_block_weights_cache_rolling_median.clear();
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bc->get_long_term_block_weight_median(bc->get_db().height() - TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW, TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW);
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bc->update_next_cumulative_weight_limit();
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// make sure the weight limit is the same
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ASSERT_EQ(weight_limit, bc->get_current_cumulative_block_weight_limit());
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}

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