public void TestFileEntry()
{
var memfs = GetCommonMemoryFileSystem();
var file = new FileEntry(memfs, "/a/a/a1.txt");
var file2 = new FileEntry(memfs, "/a/b.txt");
Assert.Equal("/a/a/a1.txt", file.ToString());
Assert.Equal("/a/a/a1.txt", file.FullName);
Assert.Equal("a1.txt", file.Name);
Assert.Equal("b", file2.NameWithoutExtension);
Assert.Equal(".txt", file2.ExtensionWithDot);
Assert.True(file.Length > 0);
Assert.False(file.IsReadOnly);
var dir = file.Directory;
Assert.NotNull(dir);
Assert.Equal("/a/a", dir.FullName);
Assert.Null(new DirectoryEntry(memfs, "/").Parent);
var yoyo = new FileEntry(memfs, "/a/yoyo.txt");
using (var file1 = yoyo.Create())
{
file1.WriteByte(1);
file1.WriteByte(2);
file1.WriteByte(3);
}
Assert.Equal(new byte[] { 1, 2, 3 }, memfs.ReadAllBytes("/a/yoyo.txt"));
Assert.Throws <FileNotFoundException>(() => memfs.GetFileSystemEntry("/wow.txt"));
var file3 = memfs.GetFileEntry("/a/b.txt");
Assert.True(file3.Exists);
Assert.Null(memfs.TryGetFileSystemEntry("/invalid_file"));
Assert.IsType <FileEntry>(memfs.TryGetFileSystemEntry("/a/b.txt"));
Assert.IsType <DirectoryEntry>(memfs.TryGetFileSystemEntry("/a"));
Assert.Throws <FileNotFoundException>(() => memfs.GetFileEntry("/invalid"));
Assert.Throws <DirectoryNotFoundException>(() => memfs.GetDirectoryEntry("/invalid"));
var mydir = new DirectoryEntry(memfs, "/yoyo");
Assert.Throws <ArgumentException>(() => mydir.CreateSubdirectory("/sub"));
var subFolder = mydir.CreateSubdirectory("sub");
Assert.True(subFolder.Exists);
Assert.Empty(mydir.EnumerateFiles());
var subDirs = mydir.EnumerateDirectories().ToList();
Assert.Single(subDirs);
Assert.Equal("/yoyo/sub", subDirs[0].FullName);
mydir.Delete();
Assert.False(mydir.Exists);
Assert.False(subFolder.Exists);
// Test ReadAllText/WriteAllText/AppendAllText/ReadAllBytes/WriteAllBytes
Assert.True(file.ReadAllText().Length > 0);
Assert.True(file.ReadAllText(Encoding.UTF8).Length > 0);
file.WriteAllText("abc");
Assert.Equal("abc", file.ReadAllText());
file.WriteAllText("abc", Encoding.UTF8);
Assert.Equal("abc", file.ReadAllText(Encoding.UTF8));
file.AppendAllText("def");
Assert.Equal("abcdef", file.ReadAllText());
file.AppendAllText("ghi", Encoding.UTF8);
Assert.Equal("abcdefghi", file.ReadAllText());
var lines = file.ReadAllLines();
Assert.Single(lines);
Assert.Equal("abcdefghi", lines[0]);
lines = file.ReadAllLines(Encoding.UTF8);
Assert.Single(lines);
Assert.Equal("abcdefghi", lines[0]);
Assert.Equal(new byte[] { 1, 2, 3 }, yoyo.ReadAllBytes());
yoyo.WriteAllBytes(new byte[] { 1, 2, 3, 4 });
Assert.Equal(new byte[] { 1, 2, 3, 4 }, yoyo.ReadAllBytes());
}