libartbase/base/utils_test.cc

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "utils.h"

#include "gtest/gtest.h"

namespace art {

class UtilsTest : public testing::Test {};

TEST_F(UtilsTest, PrettySize) {
  EXPECT_EQ("1GB", PrettySize(1 * GB));
  EXPECT_EQ("2GB", PrettySize(2 * GB));
  if (sizeof(size_t) > sizeof(uint32_t)) {
    EXPECT_EQ("100GB", PrettySize(100 * GB));
  }
  EXPECT_EQ("1024KB", PrettySize(1 * MB));
  EXPECT_EQ("10MB", PrettySize(10 * MB));
  EXPECT_EQ("100MB", PrettySize(100 * MB));
  EXPECT_EQ("1024B", PrettySize(1 * KB));
  EXPECT_EQ("10KB", PrettySize(10 * KB));
  EXPECT_EQ("100KB", PrettySize(100 * KB));
  EXPECT_EQ("0B", PrettySize(0));
  EXPECT_EQ("1B", PrettySize(1));
  EXPECT_EQ("10B", PrettySize(10));
  EXPECT_EQ("100B", PrettySize(100));
  EXPECT_EQ("512B", PrettySize(512));
}

TEST_F(UtilsTest, Split) {
  std::vector<std::string> actual;
  std::vector<std::string> expected;

  expected.clear();

  actual.clear();
  Split("", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split(":", ':', &actual);
  EXPECT_EQ(expected, actual);

  expected.clear();
  expected.push_back("foo");

  actual.clear();
  Split(":foo", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split("foo:", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split(":foo:", ':', &actual);
  EXPECT_EQ(expected, actual);

  expected.push_back("bar");

  actual.clear();
  Split("foo:bar", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split(":foo:bar", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split("foo:bar:", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split(":foo:bar:", ':', &actual);
  EXPECT_EQ(expected, actual);

  expected.push_back("baz");

  actual.clear();
  Split("foo:bar:baz", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split(":foo:bar:baz", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split("foo:bar:baz:", ':', &actual);
  EXPECT_EQ(expected, actual);

  actual.clear();
  Split(":foo:bar:baz:", ':', &actual);
  EXPECT_EQ(expected, actual);
}

TEST_F(UtilsTest, ArrayCount) {
  int i[64];
  EXPECT_EQ(ArrayCount(i), 64u);
  char c[7];
  EXPECT_EQ(ArrayCount(c), 7u);
}

TEST_F(UtilsTest, BoundsCheckedCast) {
  char buffer[64];
  const char* buffer_end = buffer + ArrayCount(buffer);
  EXPECT_EQ(BoundsCheckedCast<const uint64_t*>(nullptr, buffer, buffer_end), nullptr);
  EXPECT_EQ(BoundsCheckedCast<const uint64_t*>(buffer, buffer, buffer_end),
            reinterpret_cast<const uint64_t*>(buffer));
  EXPECT_EQ(BoundsCheckedCast<const uint64_t*>(buffer + 56, buffer, buffer_end),
            reinterpret_cast<const uint64_t*>(buffer + 56));
  EXPECT_EQ(BoundsCheckedCast<const uint64_t*>(buffer - 1, buffer, buffer_end), nullptr);
  EXPECT_EQ(BoundsCheckedCast<const uint64_t*>(buffer + 57, buffer, buffer_end), nullptr);
}

}  // namespace art