third_party/tcmalloc/chromium/src/tests/packed-cache_test.cc

// Copyright (c) 2007, Google Inc.
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// ---
// Author: Geoff Pike

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

static const int kHashbits = PackedCache<64, uint64>::kHashbits;

// A basic sanity test.
void PackedCacheTest_basic() {
  PackedCache<32, uint32> cache(0);
  CHECK_EQ(cache.GetOrDefault(0, 1), 0);
  cache.Put(0, 17);
  CHECK(cache.Has(0));
  CHECK_EQ(cache.GetOrDefault(0, 1), 17);
  cache.Put(19, 99);
  CHECK(cache.Has(0) && cache.Has(19));
  CHECK_EQ(cache.GetOrDefault(0, 1), 17);
  CHECK_EQ(cache.GetOrDefault(19, 1), 99);
  // Knock <0, 17> out by using a conflicting key.
  cache.Put(1 << kHashbits, 22);
  CHECK(!cache.Has(0));
  CHECK_EQ(cache.GetOrDefault(0, 1), 1);
  CHECK_EQ(cache.GetOrDefault(1 << kHashbits, 1), 22);
}

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

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