public void TestFallback()
{
// aggregate_fs (fs)
// => aggregate_fs (subFs)
// => memory_fs (subFsMemFs)
// => memory_fs (subMemFs)
// => memory_fs (root)
var root = new MemoryFileSystem();
var fs = new AggregateFileSystem(root);
var subFsMemFs = new MemoryFileSystem();
var subFs = new AggregateFileSystem(subFsMemFs);
fs.AddFileSystem(subFs);
var subMemFs = new MemoryFileSystem();
fs.AddFileSystem(subMemFs);
root.CreateDirectory("/a");
root.CreateDirectory("/b");
root.CreateDirectory("/c");
{
using var a = root.OpenFile("/a.txt", FileMode.Create, FileAccess.Write);
using var b = root.OpenFile("/b.txt", FileMode.Create, FileAccess.Write);
using var c = root.OpenFile("/c.txt", FileMode.Create, FileAccess.Write);
}
subFsMemFs.CreateDirectory("/b");
{
using var b = subFsMemFs.OpenFile("/b.txt", FileMode.Create, FileAccess.Write);
}
subMemFs.CreateDirectory("/a");
{
using var a = subMemFs.OpenFile("/a.txt", FileMode.Create, FileAccess.Write);
}
var findA = fs.FindFirstFileSystemEntry("/a");
Assert.Equal(subMemFs, findA?.FileSystem);
var findB = fs.FindFirstFileSystemEntry("/b");
Assert.Equal(subFsMemFs, findB?.FileSystem);
var findC = fs.FindFirstFileSystemEntry("/c");
Assert.Equal(root, findC?.FileSystem);
Assert.True(fs.DirectoryExists("/c"));
Assert.True(fs.DirectoryExists("/b"));
Assert.True(fs.DirectoryExists("/a"));
Assert.True(fs.FileExists("/c.txt"));
Assert.True(fs.FileExists("/b.txt"));
Assert.True(fs.FileExists("/a.txt"));
}
public void TestFindFileSystemEntries()
{
var fs = new AggregateFileSystem();
var memfs1 = new MemoryFileSystem();
memfs1.WriteAllText("/a.txt", "content1");
memfs1.WriteAllText("/b", "notused");
fs.AddFileSystem(memfs1);
var memfs2 = new MemoryFileSystem();
memfs2.WriteAllText("/a.txt", "content2");
memfs2.CreateDirectory("/b");
fs.AddFileSystem(memfs2);
{
var entries = fs.FindFileSystemEntries("/a.txt");
Assert.Equal(2, entries.Count);
Assert.IsType <FileEntry>(entries[0]);
Assert.IsType <FileEntry>(entries[1]);
Assert.Equal(memfs2, entries[0].FileSystem);
Assert.Equal(memfs1, entries[1].FileSystem);
Assert.Equal("/a.txt", entries[0].Path.FullName);
Assert.Equal("/a.txt", entries[1].Path.FullName);
}
{
var entries = fs.FindFileSystemEntries("/b");
Assert.Single(entries);
Assert.IsType <DirectoryEntry>(entries[0]);
Assert.Equal(memfs2, entries[0].FileSystem);
Assert.Equal("/b", entries[0].Path.FullName);
}
{
var entry = fs.FindFirstFileSystemEntry("/a.txt");
Assert.NotNull(entry);
Assert.IsType <FileEntry>(entry);
Assert.Equal(memfs2, entry.FileSystem);
Assert.Equal("/a.txt", entry.Path.FullName);
}
}