/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * 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 <gtest/gtest.h>

#include <fbjni/detail/utf8.h>

using namespace std;
using namespace facebook::jni;

TEST(Utf16toUTF8_test, nullUtf16String) {
  EXPECT_TRUE(detail::utf16toUTF8(NULL, 10).empty());
}

TEST(Utf16toUTF8_test, negativeUtf16StringLength) {
  std::vector<uint16_t> utf16String = {'a'};
  EXPECT_TRUE(detail::utf16toUTF8(utf16String.data(), -1).empty());
}

TEST(Utf16toUTF8_test, zeroUtf16StringLength) {
  std::vector<uint16_t> utf16String = {'a'};
  EXPECT_TRUE(detail::utf16toUTF8(utf16String.data(), 0).empty());
}

TEST(Utf16toUTF8_test, badFormedUtf16String) {
  std::vector<uint16_t> utf16String = {'a', 'b', 'c', 0xD800};
  auto utf8String = detail::utf16toUTF8(utf16String.data(), utf16String.size());
  EXPECT_EQ(utf8String.size(), 6);
  EXPECT_EQ(utf8String, "abc\xED\xA0\x80");
}

TEST(Utf16toUTF8_test, goodUtf16String) {
  std::vector<uint16_t> utf16String = {'a', 0x0123, 0x1234, 0xD812, 0xDC34};
  auto utf8String = detail::utf16toUTF8(utf16String.data(), utf16String.size());
  EXPECT_EQ(utf8String.size(), 10);
  EXPECT_EQ(utf8String, "a\xC4\xA3\xE1\x88\xB4\xF0\x94\xA0\xB4");
}

int main(int argc, char **argv) {
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}