text: // Copyright 2010-2021, Google Inc.
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  //
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  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
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  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #include "base/serialized_string_array.h"
  
  #include <algorithm>
  #include <cstdint>
  #include <cstring>
  #include <memory>
  #include <string>
  
  #include "base/port.h"
  #include "testing/base/public/gunit.h"
  #include "absl/strings/string_view.h"
  
  namespace mozc {
  namespace {
  
  class SerializedStringArrayTest : public ::testing::Test {
   protected:
    absl::string_view AlignString(const char *s, size_t len) {
      return AlignString(std::string(s, len));
    }
  
    absl::string_view AlignString(const std::string &s) {
      buf_.reset(new uint32_t[(s.size() + 3) / 4]);
      return absl::string_view(
          static_cast<const char *>(memcpy(buf_.get(), s.data(), s.size())),
          s.size());
    }
  
   private:
    std::unique_ptr<uint32_t[]> buf_;
  };
  
  TEST_F(SerializedStringArrayTest, DefaultConstructor) {
    SerializedStringArray a;
    EXPECT_TRUE(a.empty());
    EXPECT_EQ(0, a.size());
  }
  
  TEST_F(SerializedStringArrayTest, EmptyArray) {
    const absl::string_view data = AlignString("\x00\x00\x00\x00", 4);
    ASSERT_TRUE(SerializedStringArray::VerifyData(data));
  
    SerializedStringArray a;
    ASSERT_TRUE(a.Init(data));
    EXPECT_TRUE(a.empty());
    EXPECT_EQ(0, a.size());
  }
  
  constexpr char kTestData[] =
      "\x03\x00\x00\x00"                  // Array size = 3
      "\x1c\x00\x00\x00\x05\x00\x00\x00"  // (28, 5)
      "\x22\x00\x00\x00\x04\x00\x00\x00"  // (34, 4)
      "\x27\x00\x00\x00\x06\x00\x00\x00"  // (39, 6)
      "Hello\0"                           // offset = 28, len = 5
      "Mozc\0"                            // offset = 34, len = 4
      "google\0";                         // offset = 39, len = 6
  
  TEST_F(SerializedStringArrayTest, SerializeToBuffer) {
    std::unique_ptr<uint32_t[]> buf;
    const absl::string_view actual = SerializedStringArray::SerializeToBuffer(
        {"Hello", "Mozc", "google"}, &buf);
    const absl::string_view expected(kTestData, arraysize(kTestData) - 1);
    EXPECT_EQ(expected, actual);
  }
  
  TEST_F(SerializedStringArrayTest, Basic) {
    const absl::string_view data =
        AlignString(std::string(kTestData, arraysize(kTestData) - 1));
  
    ASSERT_TRUE(SerializedStringArray::VerifyData(data));
  
    SerializedStringArray a;
    ASSERT_TRUE(a.Init(data));
    ASSERT_EQ(3, a.size());
    EXPECT_EQ("Hello", a[0]);
    EXPECT_EQ("Mozc", a[1]);
    EXPECT_EQ("google", a[2]);
  
    SerializedStringArray b;
    b.Set(a.data());
    ASSERT_EQ(3, b.size());
    EXPECT_EQ("Hello", b[0]);
    EXPECT_EQ("Mozc", b[1]);
    EXPECT_EQ("google", b[2]);
  
    a.clear();
    EXPECT_TRUE(a.empty());
    EXPECT_EQ(0, a.size());
  }
  
  TEST_F(SerializedStringArrayTest, Iterator) {
    const absl::string_view data =
        AlignString(std::string(kTestData, arraysize(kTestData) - 1));
  
    ASSERT_TRUE(SerializedStringArray::VerifyData(data));
  
    SerializedStringArray a;
    ASSERT_TRUE(a.Init(data));
    {
      auto iter = a.begin();
      ASSERT_NE(a.end(), iter);
      EXPECT_EQ("Hello", *iter);
      ++iter;
      ASSERT_NE(a.end(), iter);
      EXPECT_EQ("Mozc", *iter);
      ++iter;
      ASSERT_NE(a.end(), iter);
      EXPECT_EQ("google", *iter);
      ++iter;
      EXPECT_EQ(a.end(), iter);
    }
    EXPECT_TRUE(std::binary_search(a.begin(), a.end(), "Hello"));
    EXPECT_TRUE(std::binary_search(a.begin(), a.end(), "Mozc"));
    EXPECT_TRUE(std::binary_search(a.begin(), a.end(), "google"));
    EXPECT_FALSE(std::binary_search(a.begin(), a.end(), "Japan"));
  }
  
  }  // namespace
  }  // namespace mozc
  