public void CleanupUnusedImageFiles_ThumbnailsAndPlaceholdersNotRemoved()
{
var storage =
GetInitialStorageWithCustomHtml(
"<html><body><div class='bloom-page'><div class='marginBox'>" +
"</div></div></body></html>");
var p1 = MakeSamplePngImage(Path.Combine(_folder.Path, "thumbnail.png"));
var p2 = MakeSamplePngImage(Path.Combine(_folder.Path, "thumbnail88.png"));
var p3 = MakeSamplePngImage(Path.Combine(_folder.Path, "placeholder.png"));
var dropmeTemp = MakeSamplePngImage(Path.Combine(_folder.Path, "dropme.png"));
storage.CleanupUnusedImageFiles();
Assert.IsTrue(File.Exists(p1.Path));
Assert.IsTrue(File.Exists(p2.Path));
Assert.IsTrue(File.Exists(p3.Path));
Assert.IsFalse(File.Exists(dropmeTemp.Path));
}