Reapply "Media Galleries API Metadata: Image metadata"

chrome/utility/media_galleries/image_metadata_extractor_unittest.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/bind.h"
+#include "base/files/file_path.h"
+#include "base/path_service.h"
+#include "base/run_loop.h"
+#include "chrome/common/chrome_paths.h"
+#include "chrome/utility/media_galleries/image_metadata_extractor.h"
+#include "media/filters/file_data_source.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace metadata {
+
+void QuitLoop(base::RunLoop* loop, bool* output, bool success) {
+  loop->Quit();
+  *output = success;
+}
+
+base::FilePath GetTestDataFilePath(const std::string& filename) {
+  base::FilePath path;
+  EXPECT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &path));
+  path = path.AppendASCII("extensions").AppendASCII("api_test")
+      .AppendASCII("wallpaper").AppendASCII(filename);
+  return path;
+}
+
+scoped_ptr<ImageMetadataExtractor> GetExtractor(
+    const std::string& filename,
+    bool expected_result) {
+  media::FileDataSource source;
+  base::FilePath test_path;
+
+  EXPECT_TRUE(source.Initialize(GetTestDataFilePath(filename)));
+
+  scoped_ptr<ImageMetadataExtractor> extractor(new ImageMetadataExtractor);
+
+  base::RunLoop loop;
+  bool extracted = false;
+  extractor->Extract(&source, base::Bind(&QuitLoop, &loop, &extracted));
+  EXPECT_EQ(expected_result, extracted);
+
+  return extractor.Pass();
+}
+
+TEST(ImageMetadataExtractorTest, JPGFile) {
+  scoped_ptr<ImageMetadataExtractor> extractor =
+      GetExtractor("test.jpg", true);
+
+  EXPECT_EQ(5616, extractor->width());
+  EXPECT_EQ(3744, extractor->height());
+  EXPECT_EQ(0, extractor->rotation());
+  EXPECT_EQ(300.0, extractor->x_resolution());
+  EXPECT_EQ(300.0, extractor->y_resolution());
+  EXPECT_EQ("2012:03:01 17:06:07", extractor->date());
+  EXPECT_EQ("Canon", extractor->camera_make());
+  EXPECT_EQ("Canon EOS 5D Mark II", extractor->camera_model());
+  EXPECT_EQ(0.01, extractor->exposure_time_sec());
+  EXPECT_FALSE(extractor->flash_fired());
+  EXPECT_EQ(3.2, extractor->f_number());
+  EXPECT_EQ(100, extractor->focal_length_mm());
+  EXPECT_EQ(1600, extractor->iso_equivalent());
+}
+
+}  // namespace metadata