formats/tiff/constants_test.cc

// Copyright 2026 Google LLC
//
// 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
//
//    https://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 "formats/tiff/constants.h"

#include "gtest/gtest.h"

namespace credentio {
namespace {

TEST(ConstantsTest, SizeOfTiffType) {
  EXPECT_EQ(SizeOfTiffType(kTiffTypeByte), 1);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeAscii), 1);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeShort), 2);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeLong), 4);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeRational), 8);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeSByte), 1);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeUndefined), 1);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeSShort), 2);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeSLong), 4);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeSRational), 8);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeFloat), 4);
  EXPECT_EQ(SizeOfTiffType(kTiffTypeDouble), 8);
  EXPECT_EQ(SizeOfTiffType(0xFFFF), 1);  // Default case
}

TEST(ConstantsTest, ByteSizeOfImageFileDirectory) {
  // count (2) + next offset (4) = 6
  EXPECT_EQ(ByteSizeOfImageFileDirectory(0), 6);
  // 6 + 1 * 12 = 18
  EXPECT_EQ(ByteSizeOfImageFileDirectory(1), 18);
  // 6 + 10 * 12 = 126
  EXPECT_EQ(ByteSizeOfImageFileDirectory(10), 126);
}

}  // namespace
}  // namespace credentio