src/tests/packed-cache_test.cc

// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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// ---
// Author: Geoff Pike

#include <stdio.h>
#include "base/logging.h"
#include "packed-cache-inl.h"

static const int kHashbits = PackedCache<20>::kHashbits;

template <int kKeybits>
static size_t MustGet(const PackedCache<kKeybits>& cache, uintptr_t key) {
  uint32 rv;
  CHECK(cache.TryGet(key, &rv));
  return rv;
}

template <int kKeybits>
static size_t Has(const PackedCache<kKeybits>& cache, uintptr_t key) {
  uint32 dummy;
  return cache.TryGet(key, &dummy);
}

// A basic sanity test.
void PackedCacheTest_basic() {
  PackedCache<20> cache;

  CHECK(!Has(cache, 0));
  cache.Put(0, 17);
  CHECK(Has(cache, 0));
  CHECK_EQ(MustGet(cache, 0), 17);

  cache.Put(19, 99);
  CHECK_EQ(MustGet(cache, 0), 17);
  CHECK_EQ(MustGet(cache, 19), 99);

  // Knock <0, 17> out by using a conflicting key.
  cache.Put(1 << kHashbits, 22);
  CHECK(!Has(cache, 0));
  CHECK_EQ(MustGet(cache, 1 << kHashbits), 22);

  cache.Invalidate(19);
  CHECK(!Has(cache, 19));
  CHECK(!Has(cache, 0));
  CHECK(Has(cache, 1 << kHashbits));
}

int main(int argc, char **argv) {
  PackedCacheTest_basic();

  printf("PASS\n");
  return 0;
}