public async Task When_AppendTextAsyncIgnoresEncoding()
{
StorageFile targetFile = null;
try
{
var originalContent = "First line3527535205šěššýétžščžíé";
var appendedContent = "New line33251164535205věšřěšřčžčšžž";
var fileName = GenerateRandomFileName();
var filePath = Path.Combine(ApplicationData.Current.LocalFolder.Path, fileName);
File.WriteAllText(filePath, originalContent, Encoding.Unicode);
targetFile = await ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
await PathIO.AppendTextAsync(targetFile.Path, appendedContent);
var realContents = File.ReadAllBytes(targetFile.Path).Skip(2).ToArray(); // Skip BOM at start
var expectedContent = Encoding.Unicode.GetBytes(originalContent).Concat(Encoding.Default.GetBytes(appendedContent)).ToArray();
CollectionAssert.AreEqual(expectedContent, realContents);
}
finally
{
DeleteFile(targetFile);
}
}
public async Task When_AppendTextAsyncWithEncoding()
{
StorageFile targetFile = null;
try
{
var originalContent = "First line3527535205šěššýétžščžíé";
var appendedContent = "New line33251164535205věšřěšřčžčšžž";
var fileName = GenerateRandomFileName();
var filePath = Path.Combine(ApplicationData.Current.LocalFolder.Path, fileName);
File.WriteAllText(filePath, originalContent, Encoding.BigEndianUnicode);
targetFile = await ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
await PathIO.AppendTextAsync(targetFile.Path, appendedContent, Windows.Storage.Streams.UnicodeEncoding.Utf16BE);
var realContents = File.ReadAllText(targetFile.Path, Encoding.BigEndianUnicode);
Assert.AreEqual(originalContent + appendedContent, realContents);
}
finally
{
DeleteFile(targetFile);
}
}