Ashin Walpola
d107534eb2
obu-firmware builds against the vanetza-idf C-ITS library, which until now came from the colleague's microbu-esp32c5 tree beside the repository and was not tracked here, so a clone of this repository could not build the firmware it ships. The library alone is now part of obu-firmware, as obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from there by default; -DVANETZA_IDF_DIR still points the build elsewhere. The rest of the colleague's tree (their own VAM firmware, PKI tooling, station-link Python tools, the V2X2MAP bridge) stays out of this repository and gitignored; nothing is pushed to their repository. NOTES.md, docs/06, TODO.md and the pcap verifier's usage line point at the new location.
83 lines
1.6 KiB
C++
83 lines
1.6 KiB
C++
#include <gtest/gtest.h>
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#include <vanetza/common/lru_cache.hpp>
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using namespace vanetza;
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class LruCacheTest : public ::testing::Test
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{
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protected:
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void SetUp() override
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{
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generator_calls = 0;
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last_key = 0;
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}
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std::function<int(int)> generator()
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{
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return [this](int key) {
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++generator_calls;
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last_key = key;
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return ~key;
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};
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}
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unsigned generator_calls;
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int last_key;
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};
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TEST_F(LruCacheTest, caching)
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{
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LruCache<int, int> cache(generator(), 5);
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// generate one new entry
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EXPECT_EQ(~8, cache[8]);
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EXPECT_EQ(1, generator_calls);
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// refer to cached entry
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EXPECT_EQ(~8, cache[8]);
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EXPECT_EQ(1, generator_calls);
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// further entry
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EXPECT_EQ(~4, cache[4]);
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EXPECT_EQ(2, generator_calls);
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// first entry is still there
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EXPECT_EQ(~8, cache[8]);
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EXPECT_EQ(2, generator_calls);
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}
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TEST_F(LruCacheTest, modify)
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{
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LruCache<int, int> cache(generator(), 5);
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// modify new cache entry
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cache[8] = 23;
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EXPECT_EQ(23, cache[8]);
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// modify existing entry
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cache[8] = 42;
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EXPECT_EQ(42, cache[8]);
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EXPECT_EQ(1, generator_calls);
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}
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TEST_F(LruCacheTest, drop_lru)
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{
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LruCache<int, int> cache(generator(), 3);
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cache[1];
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cache[2];
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cache[3];
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EXPECT_EQ(3, generator_calls);
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EXPECT_EQ(~2, cache[2]); // LRU: 1, 3, 2
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cache[4]; // drop 1, LRU: 3, 2, 4
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cache[1]; // re-create entry, LRU: 2, 4, 1
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EXPECT_EQ(5, generator_calls);
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EXPECT_EQ(~2, cache[2]);
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EXPECT_EQ(~4, cache[4]);
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EXPECT_EQ(~1, cache[1]);
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EXPECT_EQ(5, generator_calls);
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}
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